2023
Flexible terahertz gas sensing platform based on substrate-integrated hollow waveguides and an opto-electronic light source
D. Theiner, B. Limbacher, M. Jaidl, M. Ertl, M. Hlavatsch, K. Unterrainer, B. Mizaikoff, and J. Darmo
Ultrabroadband Heterogeneous THz Quantum Cascade Laser
M. Jaidl, M. Beiser, M. Giparakis, M. A. Kainz, D. Theiner, B. Limbacher, M. C. Ertl, A. M. Andrews, G. Strasser, J. Darmo and K. Unterrainer
2022
Silicon integrated terahertz quantum cascade ring laser frequency comb
M. Jaidl, N. Opačak, M. A. Kainz, D. Theiner, B. Limbacher, M. Beiser, M. Giparakis, A. M. Andrews, G. Strasser, B. Schwarz, J. Darmo and K. Unterrainer
2021
Flexible terahertz opto-electronic frequency comb light source tunable over 3.5 THz
D. Theiner, B. Limbacher, M. Jaidl, K. Unterrainer and J. Darmo
Deep learning control of THz QCLs
B. Limbacher, S. Schoenhuber, M. A. Kainz, N. Bachelard, A. M. Andrews, H. Detz, G. Strasser, J. Darmo and K. Unterainer
Comb operation in terahertz quantum cascade ring lasers
M. Jaidl, N. Opačak, M. A. Kainz, S. Schönhuber, D. Theiner, B. Limbacher, M. Beiser, M. Giparakis, A. M. Andrews, G. Strasser, B. Schwarz, J. Darmo, and K. Unterrainer
This article was featured on the cover of Optica (2021, Vol. 8, Issue 6).
2020
Terahertz optical machine learning for object recognition
B. Limbacher, S. Schönhuber, M. Wenclawiak, M. A. Kainz, A. M. Andrews, G. Strasser, J. Darmo and K. Unterrainer
APL Photonics 5(12):126103 (2020)
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Thermal-Dynamics Optimization of Terahertz Quantum Cascade Lasers with Different Barrier Compositions
M. A. Kainz, M. Wenclawiak, S. Schönhuber, M. Jaidl, B. Limbacher, A. M. Andrews, H. Detz, G. Strasser, and K. Unterrainer
All-optical adaptive control of quantum cascade random lasers
S. Schönhuber, N. Bachelard, B. Limbacher, M. A. Kainz, A. M. Andrews, H. Detz, G. Strasser, J. Darmo, S. Rotter and K. Unterrainer
Superradiant Ensembles of Terahertz Polaritonic Meta-Atoms
M. Wenclawiak, A. M. Andrews, G. Strasser, K. Unterrainer and J. Darmo
Resonant tunneling diodes strongly coupled to the cavity field
B. Limbacher, M. A. Kainz, S. Schoenhuber, M. Wenclawiak, C. Derntl, A. M. Andrews, H. Detz, G. Strasser, A. Schwaighofer, B. Lendl, J. Darmo, and K. Unterrainer
2019
Dielectric control of localized plasmons in terahertz metamaterials
M. Wenclawiak, M. A. Kainz, K. Unterrainer, J. Darmo
Photonics and Nanostructures-Fundamentals and Applications 37 (2019)
Slot-Waveguide Silicon Nitride Organic Hybrid Distributed Feedback Laser
F. Vogelbacher, M. Sagmeister, J. Kraft, X. Zhou, J. Huang, M. Li, K. Jiang, Y. Song, K. Unterrainer & R. Hainberger
Color switching of a terahertz quantum cascade laser
M. A. Kainz, S. Schönhuber, B. Limbacher A. M. Andrews, H. Detz, , G. Strasser, G. Bastard and K. Unterrainer
Thermoelectric-cooled terahertz quantum cascade lasers
M. A. Kainz, M. P. Semtsiv, G. Tsianos, S. Kurlov, W. T. Masselink, S. Schönhuber, H. Detz, W. Schrenk, K. Unterrainer, G. Strasser, and A. M. Andrews
Material gain concentration quenching in organic dye-doped polymer thin films
F. Vogelbacher, X. Zhou, J. Huang, M. Li, K. Jiang, Y. Song, K. Unterrainer, and R. Hainberger
Optical Materials Express Vol. 9, Issue 3, pp. 1208-1222 (2019)
Scattering strength dependence of terahertz random lasers
S. Schoenhuber, M. Wenclawiak, M. A. Kainz, B. Limbacher, A. M. Andrews, H. Detz, G. Strasser, J. Darmo, and K. Unterrainer
2018
Gain dynamics in a heterogeneous terahertz quantum cascade laser
C. G. Derntl, G. Scalari, D. Bachmann, M. Beck, J. Faist, K. Unterrainer and J. Darmo
Barrier Height Tuning of Terahertz Quantum Cascade Lasers for High-Temperature Operation
M. A. Kainz, S. Schönhuber, A. M. Andrews, H. Detz, B. Limbacher, G. Strasser, and K. Unterrainer
Broadband Terahertz Detection with Zero-Bias Field-Effect Transistors between 100 GHz and 11.8 THz with a Noise Equivalent Power of 250 pW/ at 0.6 THz
S. Regensburger, S. Schonhuber, M. A. Kainz, S. Winnerl, J. M. Klopf, H. Lu, A. C. Gossard, K. Unterrainer, S. Preu
IEEE Transactions on Terahertz Science and Technology (2018)
Evaluation of Material Systems for THz Quantum Cascade Laser Active Regions
H. Detz, A. M. Andrews, M. A. Kainz, S. Schönhuber, T. Zederbauer, D. MacFarland, M. Krall, C. Deutsch, M. Brandstetter, P. Klang, W. Schrenk, K. Unterrainer, G. Strasser
2017
Heterogeneous terahertz quantum cascade lasers exceeding 1.9 THz spectral bandwidth and featuring dual comb operation
M. Rösch, M. Beck, M. J. Süess, D. Bachmann, K. Unterrainer, J. Faist, G. Scalari
Direct Measurements of Terahertz Meta-atoms with Near-Field Emission of Terahertz Waves
K. Serita, J. Darmo, I. Kawayama, H. Murakami, M. Tonouchi
Journal of Infrared, Millimeter, and Terahertz Waves, 38, 9; 1107 – 1119 (2017)
High-Power Growth-Robust InGaAs/InAlAs Terahertz Quantum Cascade Lasers
C. Deutsch, M.A. Kainz, M. Krall, M. Brandsetter, D. Bachmann, S. Schönhuber, H. Detz, T. Zederbauer, D. MacFarland, A.M. Andrews, W. Schrenk, M. Beck, K. Ohtani, J. Faist, G. Strasser, and K. Unterrainer
Cooperative effects in an ensemble of planar meta-atoms
M. Wenclawiak, K. Unterrainer, and J. Darmo
Disk patch resonators for cavity quantum electrodynamics at the terahertz frequency
C. G. Derntl, D. Bachmann, K. Unterrainer, and J. Darmo
2016
Dispersion in a broadband terahertz quantum cascade laser
D. Bachmann, M. Rösch, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo
Spectrally resolved far-fields of terahertz quantum cascade lasers
M. Brandstetter, S. Schönhuber, M. Krall, M. A. Kainz, H. Detz, T. Zederbauer, A. M. Andrews, G. Strasser, and K. Unterrainer
Short pulse generation and mode control of broadband terahertz quantum cascade lasers
D. Bachmann, M. Rösch, M. J. Süess, M. Beck, K. Unterrainer, J. Darmo, J. Faist, and G. Scalari
Random lasers for broadband directional emission
S. Schönhuber, M. Brandstetter, T. Hisch, C. Deutsch, M. Krall, H. Detz, A. Andrews, G. Strasser, S. Rotter, and K. Unterrainer
InAs based terahertz quantum cascade lasers
M. Brandstetter, M. A. Kainz, T. Zederbauer, M. Krall, S. Schönhuber, H. Detz, W. Schrenz, A. M. Andrews, G. Strasser and K. Unterrainer Appl. Phys. Lett. 108, 011109 (2016)
2015
Improving the quality factor of the localized surface plasmon resonance
G.Lilley, M. Messner, and K. Unterrainer
From Photonic Crystal to Subwavelength Micropillar Array Terahertz Lasers
M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer IEEE J. Sel. Top. Quantum Electron., Vol. 21, No. 6, 8500112 (2015)
Broadband terahertz amplification in a heterogeneous quantum cascade laser
D. Bachmann, N. Leder, M. Rösch, G. Scalari, M. Beck, H. Arthaber, J. Faist, K. Unterrainer, and J. Darmo Opt. Express 23, 3117 (2015)
Coupled cavity terahertz quantum cascade lasers with integrated emission monitoring
M. Krall, M. Martl, D. Bachmann, C. Deutsch, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer Opt. Express 23, 3581 (2015)
2015
Spectral gain profile of a multi-stack terahertz quantum cascade laser
D. Bachmann, M. Rösch, C. Deutsch, M. Krall, G. Scalari, M. Beck, J. Faist, K. Unterrainer, and J. Darmo
Importance of growth direction in mid-infrared quantum cascade lasers
Pierre M. Bouzi, YenTing Chiu, Christoph Deutsch, Yamac Dikmelik, Yu Song, Vadim Tokranov, Serge Oktyabrsky and Claire Gmachl
Reversing the pump dependence of a laser at an exceptional point
M. Brandstetter, M. Liertzer, C. Deutsch, P. Klang, J. Schöberl, H.E. Türeci, G. Strasser, K. Unterrainer and S. Rotter
All-Electrical Thermal Monitoring of Terahertz Quantum Cascade Lasers
M. Krall, D. Bachmann, C. Deutsch, M. Brandstetter, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
IEEE Photon. Technol. Lett., Vol. 26, No. 14, 1470-1473 (2014)
Resonant metamaterials detectors based on THz quantum-cascade structures
A. Benz, M. Krall, S. Schwarz, D. Dietze, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Subwavelength micropillar array terahertz lasers
M. Krall, M. Brandstetter, C. Deutsch, H. Detz, A. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Free carrier absorption and inter-subband transitions in imperfect heterostructures
C. Ndebeka-Bandou, F. Carosella, R. Ferreira, A. Wacker and G. Bastard
Semiconductor Science and Technology, 29 (2014), 023001; S. 1 – 22.
2013
Spectrally coded optical nanosectioning (SpecON) with biocompatible metal–dielectric-coated substrates
K. Elsayad, A. Urich, P.S. Tan, M. Nemethova, J.V. Small, K. Unterrainer and K.G. Heinze
Rotating polarization spectroscopy for single nano-antenna characterization
G. Lilley and K. Unterrainer
Ultrastrong coupling of intersubband plasmons and terahertz metamaterials
D. Dietze, A. M. Andrews, P. Klang, G. Strasser, K. Unterrainer, and J. Darmo
High power terahertz quantum cascade lasers with symmetric wafer bonded active regions
M. Brandstetter, C. Deutsch, M. Krall, H. Detz, D. C. MacFarland, T. Zederbauer, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Magnetic-field assisted performance of InGaAs/GaAsSb terahertz quantum cascade lasers
S. Maero, L.-A. de Vaulchier, Y. Guldner, C. Deutsch, M. Krall, T. Zederbauer, G. Strasser, and K. Unterrainer,
InGaAs/GaAsSb terahertz quantum cascade lasers
C. Deutsch, H. Detz, T. Zederbauer, M. Krall, M. Brandstetter, Aaron M. Andrews, P. Klang, W. Schrenk, G. Strasser, and K. Unterrainer
Influence of the facet type on the performance of terahertz quantum cascade lasers with double-metal waveguides
M. Brandstetter, M. Krall, C. Deutsch, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Efficient population transfer in modulation doped single quantum wells by intense few-cycle terahertz pulses
D. Dietze, J. Darmo, and K. Unterrainer
Dopant migration effects in terahertz quantum cascade lasers
C. Deutsch, H. Detz, M. Krall, M. Brandstetter, T. Zederbauer, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Simultaneous positive and negative photocurrent response in asymmetric quantum dot infrared photodetectors
D. Alvarenga, C. A. Parra-Murillo, G. M. Penello, R. Kawabata, W. N. Rodrigues, D. R. Miquita, W. Schmidt, P. S. S. Guimaraes, M. P. Pires, K. Unterrainer, and P. L. Souza
Towards nanowire-based terahertz quantum cascade lasers: prospects and technological challenges
M. Krall, M. Brandstetter, C. Deutsch, H. Detz, T. Zederbauer, A. M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Probing scattering mechanisms with symmetric quantum cascade lasers
C. Deutsch, H. Detz, T. Zederbauer, A. M. Andrews, P. Klang, T. Kubis, G. Klimeck, M. E. Schuster, W. Schrenk, G. Strasser, and K. Unterrainer
Role of geometry for strong coupling in active terahertz metamaterials
D. Dietze, K. Unterrainer, and J. Darmo
2012
Scanning laser terahertz near-field imaging system
K. Serita, S. Mizuno, H. Murakami, I. Kawayama, Y. Takahashi, M. Yoshimura, Y. Mori, J. Darmo, M. Tonouchi
Silver nanoisland enhanced Raman interaction in graphene
A. Urich, A. Pospischil, M. M. Furchi, D. Dietze, K. Unterrainer, and T. Müller
Exceptionally Narrow-Band Quantum Dot Infrared Photodetector
D. R. Alvarenga, C. A. Parra-Murillo, R. M. S. Kawabata, P. S. S. Guimarães, K. Unterrainer, M. P. Pires, G. S. Vieira, J.M. Villas-Boas, M. Maialle, M. H. Degani, P.F. Farinas, N. Studart, and P. L. Souza
Free-carrier absorption in quantum cascade structures
F. Carosella, C. Ndebeka-Bandou, R. Ferreira, E. Dupont, K. Unterrainer, G. Strasser, A. Wacker, and G. Bastard
High performance InGaAs/GaAsSb terahertz quantum cascade lasers operating up to 142 K
C. Deutsch, M. Krall, M. Brandstetter, H. Detz, A. M. Andrews, P. Klang, W. Schrenk, G. Strasser, and K. Unterrainer
THz quantum cascade lasers with wafer bonded active regions
M. Brandstetter, C. Deutsch, A. Benz, G.D. Cole, H. Detz, A.M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
Superconducting Microdisk Cavities for THz Quantum Cascade Lasers
M. Brandstetter, A. Benz, C. Deutsch, H. Detz, P. Klang, A.M. Andrews, W. Schrenk, G. Strasser, and K. Unterrainer
THz-driven nonlinear intersubband dynamics in quantum wells
D. Dietze, J. Darmo, and K. Unterrainer
Microcavity-Integrated Graphene Photodetector
M. Furchi, A. Urich, A. Pospischil, G. Lilley, K. Unterrainer, H. Detz, P. Klang, A. M. Andrews, W. Schrenk, G. Strasser, and T. Mueller
Fluorescence enhancements and spectral modifications near the cut-off frequency of plasmonic structure
K. Elsayad, A. Urich, M. Nemethova, J.V. Small, K. Unterrainer, and K. G. Heinze
Dynamically phase-matched terahertz generation
D. Dietze, K. Unterrainer, and J. Darmo
Terahertz emission from a two-color plasma filament in a slot waveguide
D. Dietze, K. Unterrainer and J. Darmo
2011
Intrinsic response time of graphene photodetectors
A. Urich, K Unterrainer and T. Mueller
Terahertz Active Photonic Crystals for Condensed Gas Sensing
A. Benz, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, H. Detz, W. Schrenk, G. Strasser, K. Unterrainer
Terahertz meta-atoms coupled to a quantum well intersubband transition
D. Dietze, A. Benz, G. Strasser, K. Unterrainer and J. Darmo
Nonorthodox heterodyne electro-optic detection for terahertz optical systems
J. Darmo, D. Dietze, M. Martl, and K. Unterrainer
Time-domain spectroscopy of mid-infrared quantum cascade lasers
W. Parz, R. Haddad, T. Müller, L.R. Wilson, J. Cockburn, A. Krysa, J. Roberts and K. Unterrainer
Gain and losses in THz quantum cascade laser with metal-metal waveguide
M. Martl, J. Darmo, C. Deutsch, M. Brandstetter, A. M. Andrews, P. Klang, G. Strasser, and K. Unterrainer
2010
Fast near-field imaging of spectrally broad sources using layered metallic structures
K. Elsayad, A. Urich, K. Unterrainer, and K. G. Heinze
Terahertz quantum cascade lasers based on type II InGaAs/GaAsSb/InP
C. Deutsch, A. Benz, H. Detz, P. Klang, M. Nobile, A. M. Andrews, W. Schrenk, T. Kubis, P. Vogl, G. Strasser, and K. Unterrainer
Thermoelectric Effect in Quantum Cascade Lasers
M. Escarra, A. Benz, A. Bhatt, A. Hoffman, X. Wang, J. Fan, and C. Gmachl
Microdisk THz quantum-cascade lasers with super-conducting cavities
A. Benz, M. Brandstetter, C. Deutsch, G. Fasching, A. M. Andrews, P. Klang, W. Schrenk, G. Strasser, and K. Unterrainer
Surface-emitting terahertz quantum cascade ring lasers
C. Deutsch, E. Mujagic, A. Benz, A. M. Andrews, P. Klang, H. Detz, W. Schrenk, G. Strasser, and K. Unterrainer
Two-photon spectral hole burning spectroscopy of InAs/GaAs quantum dots
T. Moldaschl, W. Parz, T. Müller, S. Golka, G. Strasser and K. Unterrainer
Quasi phase-matched terahertz detector
J. Darmo, M. Martl and K. Unterrainer
Guided Modes in Layered Semiconductor Terahertz Structures
D. Dietze, J. Darmo, and K. Unterrainer
Dielectric properties of micaceous clays determined by terahertz time-domain spectrscopy
M. Janek, M. Matejdes, V. Szöcs, I. Bugár, A. Gaál, D. Velic, and J. Darmo
Graphene photodetectors for high-speed optical communications
T. Müller, F. Xia, and P. Avouris
Designer Laser Resonators based on Amplifying Photonic Crystals
A. Benz, C. Deutsch, G. Fasching, K. Unterrainer, A. M. Andrews, P. Klang, W. Schrenk, and G. Strasser
in: “Frontiers in Guided Wave Optics and Optoelectronics”, SCIYO, 2010, ISBN: 978-953-7619-82-4
Terahertz waveguide emitter with subwavelength confinement
M. Martl, J. Darmo, D. Dietze, K. Unterrainer, and E. Gornik
Ultrafast Spectroscopy As A Probe Of Light-Matter Interaction In A Midinfrared Quantum Cascade Laser
W. Parz, T. Müller, J. Darmo, M. Austerer, G. Strasser, L.R. Wilson, J. W. Cockburn, A. B. Krysa, J. S. Roberts, and K. Unterrainer
THz time domain spectroscopy of surface electromagnetic waves
M. Martl, J. Darmo, K. Unterrainer, E. Gornik
2009
Monolithic photonic crystal quantum-cascade laser
A. Benz, Ch. Deutsch, G. Fasching, K. Unterrainer, A.M. Andrews,P. Klang, W. Schrenk, and G. Strasser
Journal of Physics 193, 012061 (2009)
Intraband auger effect in quantum dot structures
T. Gebhard, K. Unterrainer, D. Alvarenga, P. S. S. Guimaraes, J. M. Villas-Boas, M. P. Pires, G. S. Vieira, and P. L. Souza
Journal of Physics 167, 012001 (2009)
Electrically controllable photonic molecule laser
G. Fasching, Ch. Deutsch, A. Benz, A. M. Andrews, P. Klang, R. Zobl, W. Schrenk, G. Strasser, P. Ragulis, V. Tamošiūnas, and K. Unterrainer
Opt. Express 17, 20321 (2009)
Optical study of InAs quantum dot stacks embedded in GaAs/AlAs superlattices
R. Nedzinskas, B. Cechavicius, J. Kavaliauskas, A. Cerskus, J. Kundrotas, V. Karpus, V. Tamosiunas, G. Valusis, G. Fasching, K. Unterrainer, and G. Strasser
Phys. Status Solidi C 6, 2710 (2009)
Atomic force microscopy based room temperature photocurrent-spectroscopy of single subsurface InAs quantum dots
W. Brezna, G. Fasching, K. Unterrainer, G. Strasser, and J. Smoliner
Phys. Status Solidi C 6, 793 (2009)
Superposition of negative contributions to the photocurrent spectrim of InAs/InAlGaAs/ InP quantum dot infrared photodetectors
T. Gebhard, D Alvarenga. M. P. Pires, K. Unterrainer, P. S. S. Guimarez and P. L. Souza
ECS Transactions 23, 521 (2009)
Intraband auger effect in quantum dot structures
T. Gebhard, K. Unterrainer, D. Alvarenga, P. S. S. Guimaraes, J. M. Villas-Boas, M. P. Pires, G. S. Vieira, and P. L. Souza,
Int. J. Mod. Phys. B 23, 2872 (2009)
Polarization of terahertz radiation from laser generated plasma filaments
D. Dietze, J. Darmo, S. Roither, A. Pugzlys, J. Heyman, and K. Unterrainer
J. Opt. Soc. Am. B 26, 2016 (2009)
Modulated reflectance study of InAs quantum dot stacks embedded in GaAs/AlAs superlattice
R. Nedzinskas, B. Čechavičius, J. Kavaliauskas, V. Karpus, D. Seliuta, V. Tamošiunas, G. Valušis, G. Fasching, K. Unterrainer, and G. Strasser
J. Appl. Phys. 106, 064308 (2009)
Vertically emitting terahertz quantum cascade ring lasers
E. Mujagić, C. Deutsch, H. Detz, P. Klang, M. Nobile, A.M. Andrews, W. Schrenk, K. Unterrainer, G. Strasser
Appl. Phys. Lett. 95, 011120 (2009)
Photonic crystal mode terahertz lasers
A. Benz, C. Deutsch, G. Fasching, K. Unterrainer, A.M. Andrews, P. Klang, L. K. Hoffmann, W. Schrenk, and G. Strasser
J. Appl. Phys. 105, 122404 (2009)
Theory of nonequilibrium quantum transport and energy dissipation in terahertz quantum cascade lasers
T. Kubis, C. Yeh, P. Vogl, A. Benz, G. Fasching, and C. Deutsch
Phys. Rev. B 79, 195323 (2009)
High-field splitting of the cyclotron resonance absorption in strained p-InGaAs/GaAs quantum wells
O. Drachenko, D. V. Kozlov, V. Ya. Aleshkin, V. I. Gavrilenko, K. V. Maremyanin, A. V. Ikonnikov, B. N. Zvonkov, M. Goiran, J. Leotin, G. Fasching, S. Winnerl, H. Schneider, J. Wosnitza, M. Helm
Phys. Rev. B 79, 073301 (2009)
Coherent control of ground state excitons in the nonlinear regime within an ensemble of InAs quantum dots
T. Moldaschl, T. Müller, S. Golka, W. Parz, G. Strasser, K. Unterrainer
Phys. Stat. Solidi C 6, 876 (2009)
Excitation of terahertz surface plasmon polaritons on etched groove gratings
M. Martl, J. Darmo, K. Unterrainer, and E. Gornik
J. Opt. Soc. Am. B 26, 554 (2009)
Active photonic crystal terahertz laser
A. Benz, C. Deutsch, G. Fasching, K. Unterrainer, A. M. Andrews, P. Klang, W. Schrenk, and G. Strasser
Opt. Express 17, 941 (2009)
Intersubband gain induced dispersion
W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts
Opt. Lett. 34, 208, (2009)
2008
Ultrafast phase-resolved pump-probe measurements on a quantum cascade laser
W. Kühn, W. Parz, P. Gaal, K. Reimann, M. Woerner, T. Elsaesser, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts
Appl. Phys. Lett. 93, 151106 (2008)
Dynamical frequency pulling of degenerated and nondegenerated modes in small mode volume whispering-gallery terahertz quantum-cascade lasers
G. Fasching, A. Benz, Ch. Deutsch, A. M. Andrewsa, R. Zobl, P. Klang, W. Schrenk, G. Strasser, V. Tamosiunas, and K. Unterrainer
Physica E 40, 1840 (2008)
Numerical sampling rules for paraxial regime pulse diffraction calculations
D. P. Kelly, B. M. Hennelly, A. Grün, and K. Unterrainer
J. Opt. Soc. Am. A 25, 2299 (2008)
Intraband Auger effect in InAs/InGaAlAs/InP Quantum Dot Structures
T. Gebhard, D. Alvarenga, P. L. Souza, P. S. S. Guimarães, K. Unterrainer, M. P. Pires, G. S. Vieira, and J. M. Villas-Boas
Appl. Phys. Lett. 93, 052103 (2008)
Acoustic phonon-assisted damping of Rabi oscillations in InAs quantum dots
T. Moldaschl, T. Müller, S. Golka, G. Strasser, K. Unterrainer
Phys. E 40, 2013 (2008)
Ultrafast probing of light-matter interaction in a mid-infrared quantum cascade laser
W. Parz, T. Müller, J. Darmo, K. Unterrainer, M. Austerer, G. Strasser, L. R. Wilson, J. W. Cockburn, A. B. Krysa, and J. S. Roberts
Appl. Phys. Lett. 93, 091105 (2008)
Doping depedence of LO-phonon depletion scheme THz quantum-cascade lasers
A. M. Andrews, A. Benz, C. Deutsch, G. Fasching, K. Unterrainer, P. Klang, W. Schrenk, G. Strasser
Mater. Sci. Eng., B 147, 152 (2008)
Terahertz quantum cascade devices: from intersubband transition to microcavity laser
K. Unterrainer, A. Benz, J. Darmo, C. Deutsch, G. Fasching, J. Kröll, D. P. Kelly, M. Martl, T. Müller, W. Parz, S. S. Dhillon, C. Sirtori, A. M. Andrews, W. Schrenk, G. Strasser, X. Marcadet, M. Calligaro, H. E. Beere, and D. A. Ritchie
IEEE J. Sel. Top. Quant. El. 14, 307 (2008)
Femtosecond Spectral Hole Burning
T. Moldaschl, W. Parz, S. Golka, G. Strasser and K. Unterrainer
Acta Physica Polonica A 113, 777 (2008)
Ultrafast resonant terahertz response of excitons in semiconductor quantum dots
T. Müller, W. Parz, K. Unterrainer, S. Sauvage, J. Houel, P. Boucaud, A. Miard, and A. Lemaître
Phys. Rev. B 77, 035314 (2008)
2007
Spread Space Spread Spectrum Technique for Secure Multiplexing
B. M. Hennelly, J. T. Sheridan, D. P. Kelly, G. Unnikrishnan, B. Javidi, T. J. Naughton, J. McDonald
Opt. Lett. 32, 1060 (2007)
Fundamental diffraction limitations in a paraxial 4-f imaging system with coherent and incoherent illumination
D P. Kelly, J. T. Sheridan, William T. Rhodes
J. Opt. Soc. A 24, 1911 (2007)
Controlling speckle using lenses and free space
D. P. Kelly, J. E. Ward, U. Gopinathan, and J. T. Sheridan
Opt. Lett. 32, 3394 (2007)
Two-electron states bound to interface defects in quantum cascade lasers subject to a strong magnetic field
R. Ferreira, G. Bastard, C. Sirtori, G. Strasser, and K. Unterrainer
Phys. Rev. B 76, 165322 (2007)
Spread Space Spread Spectrum Technique for Secure Multiplexing
B. M. Hennelly, J. T. Sheridan, D. P. Kelly, G. Unnikrishnan, B. Javidi, T. J. Naughton, J. McDonald
Opt. Lett. 32, 1060 (2007)
Phase-resolved measurement of stimulated emission in a laser
J. Kröll, J. Darmo, S.S. Dhillon, X. Marcadet, M. Calligaro, C. Sirtori and K. Unterrainer
Nature 449, 698 (2007)
Subwavelength Microdisk and Microring Terahertz Quantum-Cascade Lasers
G. Fasching, V. Tamosiunas, A. Benz, A. M. Andrews, K. Unterrainer, R. Zobl, T. Roch, W. Schrenk, and G. Strasser
IEEE J. Quant. El. 43, 687 (2007)
Terahertz photonic crystal resonators in double-metal waveguides
A. Benz, C. Deutsch, G. Fasching, A.M. Andrews, K. Unterrainer, P. Klang, W. Schrenk, and G. Strasser
Opt. Express 15, 12418 (2007)
Longitudinal spatial hole burning in terahertz quantum cascade lasers
J. Kröll, J. Darmo, K. Unterrainer, S. S. Dhillon, C. Sirtori, X. Marcadet and M. Calligaro
Appl. Phys. Lett. 91, 161108 (2007)
Metallic wave-impedance matching layers for broad-band optical systems
J. Kröll, J. Darmo and K. Unterrainer
Opt. Express 15, 67552 (2007)
Terahertz optical activity of sucrose single crystals
J. Kröll, J. Darmo and K. Unterrainer
Vibrational Spectroscopy 43, 324 (2007)
Quantum dot structures grown on Al containing quaternary material for infrared photodetection beyond 10 µm
P. L. Souza, A. J. Lopes, T. Gebhard, K. Unterrainer, M. P. Pires, J. M. Villas-Boas, G. S. Vieira, P. S. S. Guimarães, and N. Studart
Appl. Phys. Lett. 90, 173510 (2007)
Influence of doping on the performance of terahertz quantum-cascade lasers
A. Benz, G. Fasching, A. M. Andrews, M. Martl, K. Unterrainer, T. Roch, W. Schrenk, S. Golka, and G. Strasser
Appl. Phys. Lett. 90, 101107 (2007)
Polarization dependence of intraband transitions in QDIPs
T. Gebhard, P.L. Souza, F.F. Schrey, G. Strasser, K. Unterrainer, M.P. Pires, S.M. Landi, J.M. Villas-Boas, N. Studart
Phys. Stat. Sol. C 4, 304 (2007)
2006
Single InAs/GaAs quantum dots: Photocurrent and cross-sectional AFM analysis
G. Fasching, F.F. Schrey, T. Roch, A.M. Andrews, W. Brezna, J. Smoliner, G. Strasser and K. Unterrainer
Physica E 32, 183 (2006)
Microcavity THz quantum cascade laser
G. Fasching, A. Benz, R. Zobl, A.M. Andrews, T. Roch, W. Schrenk, G. Strasser, V. Tamosiunas, and K. Unterrainer
Physica E 32, 316 (2006)
Ultrafast spectral hole burning spectroscopy of exciton spin flip processes in InAs/GaAs quantum dots
T. Müller, G. Strasser, and K. Unterrainer
Appl. Phys. Lett. 88, 192105 (2006)
2005
Microcavity terahertz quantum-cascade laser
G. Fasching, A. Benz, R. Zobl, A. M. Andrews, T. Roch, W. Schrenk, G. Strasser, and K. Unterrainer
Proc. SPIE Int. Soc. Opt. Eng. 6010, 601006 (2005)
Terahertz Microcavity Quantum Cascade Lasers
G. Fasching, A. Benz, K. Unterrainer, R. Zobl, A. M. Andrews, T. Roch, W. Schrenk, and G. Strasser
Appl. Phys. Lett. 87, 21112(2005)
Photocurrent spectroscopy of single InAs/GaAs quantum dots
G. Fasching, F. F. Schrey, W. Brezna, J. Smoliner, G. Strasser, and K. Unterrainer
Phys. Stat. Sol. C 8, 3114 (2005)
Intersublevel dynamics in semiconductor quantum dots
F. F. Schrey, T. Müller, G. Fasching, S. Anders, C. Pflügl, W. Schrenk, G. Strasser, and K. Unterrainer
Physica E, 25, 271 (2004)
Intraband transitions in quantum dot superlattice heterostructures
F. F. Schrey, L. Rebohle, T. Müller, G. Strasser, K. Unterrainer, D. P. Nguyen, N. Regnault, R. Ferreira, and G. Bastard
Phys. Rev. B 72, 155310 (2005)
THz collective oscillations of ballistic electrons in wide potential wells: Bridging classical transport with quantum dynamics
M. Eckardt, M. Betz, A. Schwanhäußer, S. Trumm, F. Sotier, L. Robledo, S. Malzer, T. Müller, K. Unterrainer, A. Leitenstorfer, and G. H. Döhler
Europhys. Lett. 70, 534 (2005)
Tracing deeply buried InAs/GaAs quantum dots using AFM and wet chemical etching
G. Fasching, W. Brezna, J. Smoliner, G. Strasser, and K. Unterrainer
Appl. Phys. Lett. 86, 063111 (2005)
Time and frequency resolved THz spectroscopy of micro- and nano-systems
J. Kröll, J. Darmo, and K. Unterrainer
Acta Physica Polonica A 107, 92 (2005)
Finite-Difference Time-Domain Simulation of Mid- and Far- Infrared Quantum Cascade Lasers
V. Tamosiunas, Z. Kancleris, M. Dagys, R. Simniskis, M. Tamosiuniene, G. Valuris, G. Strasser, and K. Unterrainer
Acta Physica Polonica A 107, 179 (2005)
Influence of carrier-carrier interaction on the time-dependent intersubband absorption in a semiconductor quantum well
T. Müller, W. Parz, G. Strasser, and K. Unterrainer
Phys. Rev B 70, 155324 (2004)
2004
Optically induced intraband electron transfer in self-assembled InAs quantum dots
F. F.Schrey, G. Fasching, T. Müller, G. Strasser, and K. Unterrainer
Phys. Stat. Sol. C 1, 434 (2004)
High performance of terahertz electro-optic detector
J. Kröll, J. Darmo, and K, Unterrainer
Electron. Lett. 40, 763 (2004)
New generation of photoconductive few-cycle Terahertz emitters
J. Darmo, G. Strasser, T. Roch, T. Müller, K. Unterrainer, G. Tempea, T. Le, and A. Stingl
Ultrafast Optics IV, Springer Series in Optical Sciences, Vol. 95, Krausz, F.; Korn, G.; Corkum, P.; Walmsley, I.A. (Eds.), (Springer, Berlin 2004) pp. 407-412.
Imaging with a Terahertz quantum cascade laser
J. Darmo, V. Tamosiunas, G. Fasching, J. Kröll, and K. Unterrainer
Opt. Express 12, 1879 (2004)
Intraband relaxation of photoexcited electrons in GaAs/AlGaAs quantum wells and InAs/GaAs self-assembled quantum dots
T. Müller, W. Parz, F. Schrey, G. Strasser, and K. Unterrainer
Semicond. Sci. Technol. 19, 287 (2004)
Exotic transport regime in GaAs: absence of intervalley scattering leading to quasi-ballistic, reals-space THz oscillations
M. Eckardt, A. Schwanhäußer, L. Robledo, S. Malzer, G. H. Döhler, M. Betz, S. Trumm, A. Leitenstorfer, T. Müller, and K. Unterrainer
Semicond. Sci. Technol., 19, 195 (2004)
Magnetic field effects in Terahertz Quantum Cascade Lasers
V. Tamosiunas, R. Zobl, G. Fasching, J. Ulrich, G. Strasser, K. Unterrainer, R. Colombelli, C. Gmachl, K. West, L. Pfeiffer, and F. Capasso
Semicond. Sci. Technol. 19, 348 (2004)
Few-cycle THz generation and spectroscopy of nanostructures
J. Darmo, T. Müller, W. Parz, J. Kröll, G. Strasser, K. Unterrainer
Phil. Trans. R. Soc. Lond. A 362, 1 (2004)
Pulse-Induced Quantum Interference of Intersubband Transitions in Coupled Quantum Wells
T. Müller, W. Parz, G. Strasser, and K. Unterrainer
Appl. Phys. Lett. 84, 64 (2004)
2003
Terahertz Quantum Cascade Lasers in a Magnetic Field
V. Tamosiunas, R. Zobl, J. Ulrich, K. Unterrainer, R. Colombelli, C. Gmachl, F. Capasso, K. West, and L. Pfeiffer
Appl. Phys. Lett. 83, 3873 (2003)
Ultrafast intraband spectroscopy of electron capture and relaxation in InAs/GaAs quantum dots
T. Müller, F. F. Schrey, G. Strasser, and K. Unterrainer
Appl. Phys. Lett. 83, 3572 (2003)
Terahertz emitter with an integrated semiconductor Bragg mirror
J. Darmo, T. Müller, G. Strasser, K. Unterrainer, and G. Tempea
Electron. Lett. 39, 640 (2003)
Electroluminescence of a quantum dot cascade structure
S. Anders, L. Rebohle, F. F. Schrey, W. Schrenk, K. Unterrainer, and G. Strasser
Appl. Phys. Lett. 82, 3862 (2003)
Energy level engineering in InAs quantum dot stacks embedded in AlAs/GaAs superlattices
L. Rebohle, F. F. Schrey, S. Hofer, G. Strasser, and K. Unterrainer
Physica E 17, 42 (2003)
Unterrainer Group 
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