International Quantum Cascade Lasers School & Workshop 2014, September 7th-12th 2014



  • Sunday September 7th

    16.30 – 18.30: Registration
    19.00 – 20.30: Welcome Cocktail
    20.30: Dinner at “Luna Restaurant” – Marinagri Resort

  • Monday September 8th

    08.45 – 09.00: Miriam S. Vitiello (Consiglio Nazionale delle Ricerche, Italy) Opening remarks
    School Session I
    Chair: Giacomo Scalari (ETHZ, Switzerland)
    09.00 – 09.50: Gottfried Strasser (Technical University of Vienna, Austria), “Growth and Processing of QCLs: from Material Aspects to Integrated Optics”
    09.50 – 10.40: Roland Teissier (University of Montpellier II, France), “Short wavelength Quantum Cascade Lasers: Materials, physics and applications”
    10.40 – 11.00: Coffee break

    School Session II
    Chair: Alessandro Tredicucci (University of Pisa, Italy)
    11.00 – 11.50: Jerry Meyer (Naval Research Laboratory, USA), “The Interband Cascade Laser – Competing or Complimentary to the QCL?”
    11.50 – 12.40: Frank Tittel (Rice University, USA), “Inter-band & Sub-band Quantum Cascade Laser based Trace Gas Sensor Technologies: Recent advances and Applications”
    12.50 – 15.00: Lunch break and beach time

    School Session III
    Chair: Jerome Faist (ETHZ, Switzerland)
    15.00 – 15.50: Carlo Sirtori (Université Paris-Diderot, France), “Microwave modulation of quantum cascade lasers”
    15.50 – 16.40: Karl Unterrainer (Vienna University of Technology, Austria), “Ultrafast phenomena and time domain spectroscopy in THz QCLs”
    16.40 – 17.00: Coffee break
    17.00 – 17.50: Masamichi Yamanishi (Hamamatsu Photonics, Japan), “Frequency-Noise and Linewidth of Quantum-Cascade Lasers”
    17.50 – 19.50: Poster session I
    Social event: 20.30 Special “Lucan Dinner” at Marinagri Resort

  • Tuesday September 9th

    School Session IV
    Chair: Jacob Khurgin (Johns Hopkins University, Baltimore USA)
    08.30 – 09.20: Jerome Faist (ETHZ, Switzerland), “Quantum cascade lasers frequency combs in the mid-infrared and terahertz”
    09.20 – 10.10: Alexey Belyanin (Texas A&M University, USA), “Optical Nonlinearities, Mode Locking, and Ultrashort Pulse Generation in Quantum Cascade Lasers”
    10.10 – 10.40: Coffee break

    School Session V
    Chair: Qing Hu (MIT, USA)
    10.40 – 11.30: Edmund Linfield (University of Leeds, UK), “MBE Growth of GaAs-AlGaAs Terahertz Frequency Quantum Cascade Lasers”
    11.30 – 12.20: Sushil Kumar (Lehigh University, USA), “Terahertz quantum cascade lasers: recent progress and future challenges”
    12.20 – 14.20: Lunch break and beach time

    Starting Session in honor of “H.C. Liu”
    Chair: Federico Capasso (Harvard University)
    Introduction: 14.20 – 14.35
    14.35 – 15.05: Qing Hu (MIT, USA) (Keynote), “THz QCL frequency combs, amplifiers, and antenna-coupled efficient emitters”
    15.05 – 15.25: Harald Schneider (Helmholtz-Zentrum Dresden-Rossendorf, Germany), “QWIP-Based “Ultrafast” Detectors for QCL Research”
    15.25 – 15.45: coffee break
    15.45 – 16.05: Jacob Khurgin (Johns Hopkins University, Baltimore USA), “How small can one make a semiconductor laser?”
    16.05 – 16.25: Manfred Helm (Helmholtz-Zentrum Dresden-Rossendorf, Germany), “Population Dynamics in Graphene Landau Levels”
    16.25 – 16.55: Dayan Ban (University of Waterloo, Canada), “Direct Observation of Electric Field Domain in the Active Region of Terahertz Quantum Cascade Laser”

    17.15 – 21.00:
    Social event
    – Visit to the “National Museum of Siritide”
    – Classical Music Concert in the Policoro Castle
    21.00: Dinner at “Luna Restaurant” – Marinagri Resort

  • Wednesday September 10th

    Session I: Mid-IR and long-IR QCLs
    Chair: Carlo Sirtori (Université Paris-Diderot, France)
    08.30 – 09.00: Federico Capasso (Harvard University, USA) (Keynote) “Quantum Cascade Laser based Mid-IR Photonics: an enabling technology for the “Internet of Things”
    09.00 – 09.20: Mikhail Belkin (The University of Texas at Austin, USA) (Invited) “Nonlinear optics with quantum-engineered intersubband metamaterials”
    09.20 – 09.35: D. Chastanet (University of Paris Sud, France) “Room temperature distributed feedback long-infrared (=18 m) InAs-based quantum cascade lasers”
    09.35 – 09.50: G. Lollia (University of Montpellier II, France) “Far infrared ( ≈ 20 m) InAs/AlSb Quantum Cascade Lasers with dielectric waveguide”
    09.50 – 10.05: T. Edamura (Hamamatsu Photonics, Japan) “Wide Band Tune-Ability of Emission Wavelength in Mid-Infrared Quantum Cascade Lasers designed with Dual-Upper-State Concept”
    10.05 – 10.30: coffee break

    Session II: Terahertz QCLs I
    Chair: Benjamin Williams (University of California Los Angeles, USA)
    10.30 – 10.50: Raffaele Colombelli (University of Paris Sud, France)(Invited) “Phased arrays of surface-emitting THz QC lasers”
    10.50 – 11.05: C. Wu (Lehigh University, USA) “Single-mode THz quantum cascade lasers with ultra-narrow beam pattern”
    11.05 – 11.20: F. Castellano (NEST, CNR- NANO, Italy) “Tailoring the frequency and the emission angle of a THz QCL via aperiodic distributed feedback gratings”
    11.20 – 11.35: M. Brandstetter (Vienna University of Technology, Austria) “High Performance THz Quantum Cascade Lasers with Wafer Bonded Symmetric Active Regions”
    11.35 – 11.50: L. Li (University of Leeds, UK) “THz quantum cascade lasers with output power over 1 W”

    Session III: Theory
    Chair: Andreas Wacker (Lund University, Sweden)
    11.50 – 12.05: A. Vasanelli (Université Paris-Diderot, France) “Infrared Optical Properties of a Dense Electron Gas”
    12.05 – 12.20: C. Jirauschek (Technische Universität München, Germany) “Monte Carlo modeling of THz difference frequency generation in quantum cascade laser sources”
    12.20 – 12.35: M.Lindskog (Lund University, Sweden) “Impact of Interface Roughness Modeling on Simulated QCL Performance”
    12.35 – 12.50: G.Pegolotti (Université Paris-Diderot, France) “Quantum Model of Coupling between Intersubband Plasmons”

    Chair: Timothy Day (Daylight Solutions)
    “Industrial prospects preview”
    12.50 – 13.10: Federico Capasso, Christian Pfluegl (Eos Photonics, Inc., USA) “Monolithic QCL Solutions for Portable High Performance Spectroscopy”
    13.10 – 14.15: Lunch break
    14.30 – 23.30:
    Social event
    – Excursion to the Unesco world heritage site: “The Sassi and the Park of the Rupestrian Churches of Matera”
    – Dinner in the “Sassi“

  • Thursday September 11th

    Session IV: Terahertz QCLs II
    Chair: Miriam S. Vitiello (NEST, CNR-NANO, Italy)
    08.30 – 09.00: Manijeh Razeghi (Northwestern University, USA) (Keynote) “Taking the Beast by its Horns: How we tamed QCL to Do What Nobody Believed Possible”
    09.00 – 09.15: Alberto Ronzani (Scuola Normale Superiore, Italy)(Invited) “Quasi-crystal Quantum Cascade Terahertz Lasers”
    09.15 – 09.30: K.Fujita (Hamamatsu Photonics, Japan) “Room-temperature Terahertz Quantum Cascade Laser Sources Designed with Dual Upper State Concept”
    09.30 – 09.45: S.Jung (The University of Texas at Austin, USA) “Widely-Tunable Monolithic Terahertz Quantum Cascade Laser Sources Based on Difference-Frequency Generation”
    09.45 – 10.00: B.Paulillo (University of Paris Sud, Paris, France) “Circuit-Tunable Sub-Wavelength Resonators For THz Intersubband Photonics”
    10.00 – 10.15: I.Kundu (University of Leeds, UK) “Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities”
    10.15 – 10.30: M.V.Santacroce (University of Bari, Italy) “Thermal characteristics of THz quantum cascade emitters based on phonon-photon-phonon active regions”
    10.30 – 10.45: S. Birner (Nextnano GmbH, Germany) “Efficient Method for the Calculation of Dissipative Quantum Transport in Quantum Cascade Lasers”
    10.45 – 11.10: coffee break

    Session V: Mid-IR QCLs
    Chair: Manijeh Razeghi (Northwestern University, USA)
    11.10 – 11.30: Marco Ravaro (CNR-INO, Florence, Italy) (Invited) “Mid-infrared digital holography with a quantum cascade laser”
    11.30 – 11.45: P.Reininger (Vienna University of Technology, Austria) “Room temperature quantum cascade detector”
    11.45 – 12.00: D.Bleh (Fraunhofer Institute for Applied Solid State Physics, Germany) “Miniaturization of a fast tunable external cavity QCL with customized gratings and MOEMS components”
    12.00 – 12.15: S.Riedi (ETHZ, Switzerland) “Broadband superluminescence, 5.9 m to 7.2 m, of a Quantum Cascade slab”
    12.15 – 12.30: P.Jouy (ETHZ, Switzerland) “1st and 2nd order DFB gratings based Surface Emission Quantum Cascade Lasers Array”
    12.30 – 12.45: T.Mansuripur (Harvard University, USA) “Multiple quasi-stable spectral outputs at constant current in a high-power quantum cascade laser”
    12.45 – 13.00: D.Botez (Univ. of Wisconsin-Madison, USA) “Resonant Leaky-Wave Coupled Phase-Locked Arrays of QCLs: 3.0 W Near-Diffraction-Limited Power at 8.36 m”
    13.00 – 15.00: Lunch break and beach time

    Session VI: Frequency Combs and Metrology
    Chair: Massimo Inguscio (National Institute of Metrology and LENS Italy)
    15.00 – 15.30: Theodor Hänsch (Max Planck Institute of Quantum Optics, Germany) (Keynote) “Spectroscopy with Laser Frequency Combs”
    15.30 – 15.50: David Burghoff (MIT, USA) (Invited) “Terahertz quantum cascade laser frequency combs”
    15.35 – 15.50: G.Villares (ETHZ, Switzerland) “Dual Comb Spectroscopy based on Quantum Cascade Laser Frequency Combs”
    15.50 – 16.15: coffee break
    Chair: Paolo De Natale (CNR-INO, Italy)
    16.15 – 16.30: S.Bartalini (CNR-INO, Florence Italy) “QCL-based Metrological THz Spectroscopy”
    16.30 – 16.45: F.Wang (Ecole Normale supérieure, Paris, France) “Injection seeding of metal-metal Terahertz quantum cascade lasers”
    16.45 – 17.00: M.Rosch (ETHZ, Switzerland) “Analysing the output of ultra-broadband THz quantum cascade lasers”
    17.00 – 17.15: A.Amy-Klein (Laboratoire de Physique des Lasers Université Paris 13, France) “Quantum Cascade Laser stabilization at the Hz-level”
    17.15 – 17.30: F.Cappelli (CNR-INO, Florence Italy) “Optical Control of Quantum Cascade Lasers”
    17.30 – 19.30: Poster session II
    20.30 Conference banquet Restaurant “Le Terrazze”

  • Friday September 12th

    Session VII: Applications I
    Chair: Erik Gornik (Vienna University of Technology, Austria)
    08.30 – 09.00: Claire Gmachl (Princeton University, USA) (Keynote) “Mid-InfraRed Technologies for Health and the Environment”
    09.00 – 09.20: Damien Weidmann (Rutherford Appleton Laboratory, Oxford UK) (Invited) “Application of Quantum Cascade Lasers for Coherent Remote Sensing of Chemicals”
    09.20 – 09.35: V.Spagnolo (University of Bari, Italy) “QCL-based terahertz quartz enhanced photo-acoustic sensor”
    09.35 – 09.50: G.Wysocki (Princeton University, USA) “Quantum cascade laser based mid-IR Faraday rotation spectrometers for environmental, medical and combustion diagnostics”
    09.50 – 10.05: B.Schwarz (Vienna University of Technology, Austria) “Monolithically integrated chemical sensor based on intersubband transitions and plasmonics”
    10.05 – 10.30: coffee break

    Session VIII: Applications II
    Chair: Sukhdeep Dhillon (Ecole Normale supérieure, Paris, France)
    10.30 – 10.50: Bela Tuzson (EMPA, Switzerland) (Invited) “Frontiers of mid-IR Direct Absorption Laser Spectroscopy: Applications, Advances and Outlook”
    10.50 – 11.05: M.Allen (Physical Sciences Inc., USA) “QCL-Coupled Silicon-on-Sapphire Ring Resonators as Gas Sensors”
    11.05 – 11.20: W.Ritter (QuantaRed Technologies, Austria) “Liquid spectroscopy with MIR QCLs for industrial application – from single-wavelength to multi-wavelength”
    11.20 – 11.35: H.W.Huebers (German Aerospace Center (DLR), Berlin, Germany) “4.7-THz Quantum-Cascade Laser as Local Oscillator for the Stratospheric Observatory for Infrared Astronomy”
    11.35 – 11.50: J.R.Gao (Delft University of Technology,The Netherlands) “4.7 THz QCL as Local Oscillator for NASA Stratospheric Terahertz Observatory (STO)”
    11.50 – 12.05: F.Mezzapesa (University of Bari, Italy) “Free carrier imaging by optical feedback in terahertz quantum cascade lasers”
    12.05 – 12.20: J.Keeley (University of Leeds, UK) “Electrical Modulation Schemes for Imaging by Self-Mixing in Terahertz Quantum Cascade Lasers”
    12.20 – 12.35: L.Masini (Scuola Normale Superiore, Italy) “Terahertz probe of individual sub-wavelength objects in a water environment”
    12.35 – 12.50: C.Bonzon (ETHZ, Switzerland) “Integrated antenna arrays on benzocyclobutene for quantum cascade lasers at terahertz frequencies”
    12.50 – 14.30 Lunch break

    Session VIII: Industrial session: application and commercial prospects
    Chair: Gaetano Scamarcio (University of Bari, Italy)
    14.30 – 14.45: Opening
    Dr. Raffaele Liberali (Commissioner for Research and Development, Regione Basilicata), Dr. Andrea Trevisi (Basilicata Innovazione, Italy)
    14.45 – 15.05: Timothy Day (Daylight Solutions, USA) “Twenty Years On: Current State of the Art in Commercialization and Applications of Quantum Cascade Lasers and Instruments”
    15.05 – 15.25: Ronald Holzwarth (Menlo Systems GmbH, Germany) “Mid IR frequency combs for characterization and locking of QCLs”
    15.25 – 15.45: Stéphane Blaser (Alpes Lasers, Switzerland) “High performance, low dissipation QCL across the mid-IR range”
    15.45 – 16.05: Barry McManus (Aerodyne Research Inc. USA) “Application of QCLs to High Precision Atmospheric Trace Gas Instruments: Performance, Laser Personality and Noise Analysis”
    16.05 – 16.25: Mathieu Carras (MirSense, France) “Monolithic integrated tunable QCL sources for Spectroscopy”
    16.25 – 17.00: Wrap up session and closing remarks
    18.45 – 20.30: Basilicata Wine Tasting

  • Poster session I

    Poster session I
    Chair: Noriaki Horiuchi, (Nature Photonics)
    01 – F. Cappelli (CNR-INO, Florence Italy) “High-Coherence Mid-Infrared Frequency Comb Generation and Applications”
    02 – F. Castellano (NEST, CNR-NANO, Pisa Italy) “Coupling THz quantum-cascade lasers to polymeric optical fibers”
    03 – B. Darquié (Université Paris 13, Paris France) “A Widely Tunable 10-m QCL Locked to a Metrological Mid-IR Reference for Precision Molecular Spectroscopy”
    04 – F. Demmerle (Walter Schottky Institut, Garching, Germany) “Modulated Distributed Feedback Gratings for Dual Wavelength Emission in Mid-Infrared Quantum Cascade Lasers”
    05 – M. Dyksik (Wroclaw University of Technology, Poland) “Optical characterization of active regions in interband cascade laser with plasmon waveguiding enhancement”
    06 – S. Ferre (III-V Lab, Paris, France) “Modeling the gain spectrum in Quantum Cascade Lasers”
    07 – K. Fujita (Hamamatsu Photonics, Japan) “High Photoresponse in Quantum Cascade Detector based on Coupled-Well Design”
    08 – C. Gilles (III-V Lab, Paris, France) “Monolithic multiplexed DFB-QCL array on InP”
    09 – A. Harrer (Vienna University of Technology, Austria) “Mid-infrared detectors with on-chip light collection”
    10 – B. Hinkov – (ETHZ, Switzerland) “13.5-GHz modulation of room-temperature mid-infrared quantum cascade lasers”
    11 – T. Hirohata – (Hamamatsu Photonics, Japan) “Manipulation of Electrical Flicker-Noise by Dopant Positioning in Injectors of Quantum-Cascade Lasers”
    12 – S. Houver (Ecole Normale supérieure, Paris, France) “Optical sideband generation with Mid-infrared quantum cascade lasers up to room temperature”
    13 – F. Janiak – (Wroclaw University of Technology, Poland) “Optical properties of GaSb-based type II InAs/GaInAsSb/InAs quantum wells for the active region of mid-IR interband cascade lasers”
    14 – E.P.Karbownik (Institute of Electron Technology, Warsaw Poland) “Quantum Cascade Laser Beam Stability Measurements by Using a Goniometric Profilometer”
    15 – T. Laurent (Université Paris-Diderot, France) “Evidence of Strong Radiative Multisubband Plasmon Decay”
    16 – X. Lü (Paul-Drude-Institut, Berlin, Germany) “Efficient Simulation of the Impact of Interface Grading on the Properties of Quantum-Cascade Lasers”
    17 – E. Maciejewska (Institute of Electron Technology, Warsaw Poland) “Fabrication Technology for Mid-IR Quantum Cascade Lasers Using Inductively Coupled Plasma Reactive Ion Etching (ICP RIE)”
    18 – J.M. Manceau (Université Paris Sud, Paris, France) “Mid-IR room-temperature intersubband polaritons in dispersive metal-insulator-metal resonators”
    19 – F. Mezzapesa (University of Bari, Italy) “Linewidth measurement by optical feedback in quantum cascade lasers”
    20 – M. Moradinasab (Institute for Microelectronics, Wien, Austria) “Improved Active Region Designs for Mode Locking in Quantum Cascade Lasers”
    21 – C. Ndebeka-Bandou (Ecole Normale supérieure, Paris, France) “Free carrier absorption in quasi-two dimensional heterostructures: the effect of light polarization”
    22 – G. Paravicini Bagliani (ETHZ, Switzerland) “Resonance effects in magneto-transport through Quantum Dash Cascade Laser Structure”
    23 – A. Sampaolo (University of Bari, Italy) “Single-mode hollow core fiber coupled with a quantum cascade laser emitting at 5 m”
    24 – V. Trinite (III-V Lab, Paris, France) “Experimental and theoretical study of the gain saturation in MIR QCL”
    25 – D. Urbanczyk (Institute of Electron Technology, Warsaw, Poland) “Investigation of heat transport in periodic photonic nanostructures by means of spatially-resolved photoluminescence measurements”
    26 – A. Wójcik-Jedlinska (Institute of Electron Technology, Warsaw Poland) “Examination of quantum cascade laser performance by -probe photoluminescence measurements”
    27 – Q.Yang (Fraunhofer Institute for Applied Solid State Physics, Germany) “Limitation of Power Efficiency of Mid-Infrared Quantum Cascade Lasers and Ways to Improve”
    28 – M.C. Zheng (Princeton University, USA) “Optimized Low Power Ring Cavity Quantum Cascade Laser”
    29 – Y. Song (Princeton University, USA) “Intersubband Electroluminescence in GaN/AlxGa1-xN Quantum Cascade Emitter Structure”
    30 – L. T. Le (Princeton University, USA) “Ultra-Broad Quantum Cascade Gain Medium”

  • Poster session II

    Poster session II
    Chair: Noriaki Horiuchi, (Nature Photonics)
    01 – D. Bachmann (Vienna University of Technology, Austria) “Towards a broadband metal-metal terahertz quantum cascade laser amplifier”
    02 – A. Campa (CNR-INO, Florence Italy) “Evidences of saturation effects in CH3OH molecule by means of THz QCL based spectroscopy”
    03 – R. Casini (Università di Napoli “Federico II”, Italy) “Spectral signature system based on Quantum Cascade Laser’s linear array”
    04 – F. Castellano (NEST, CNR-NANO, Pisa Italy) “Influence of contact layers thickness on the performance of ambipolar, wide bandwidth THz quantum cascade lasers”
    05 – L. Columbo (University of Bari, Italy) “Quantum Cascade Lasers with Optical Feedback: Coherent Multimode Dynamics”
    06 – M. Dyksik – (Wroclaw University of Technology, Poland) “Optical properties of AlGaAs/GaAs active regions for quantum cascade lasers on mid infrared and terahertz range”
    07 – A. Grier (University of Leeds, UK) “Influence of barrier height on interface roughness scattering and coherent transport in AlGaAs quantum cascade lasers”
    08 – Y.J. Han (University of Leeds, UK) “Silver-based surface plasmon waveguide for terahertz quantum cascade lasers”
    09 – A. Hangauer (Princeton University, USA) “Nonlinear effects due to lateral spatial hole burning in QCLs”
    10 – M. Krall (Vienna University of Technology, Vienna, Austria) “From Photonic Crystal to Sub-wavelength Micropillar Array Terahertz Quantum Cascade Lasers”
    11 – K. Krivas (Lund University, Sweden) “Impact of the Location for Roughness and Doping on the Operation of Quantum Cascade Lasers”
    12 – H. Li (Université Paris-Diderot, France) “Single mode operation of coupled-cavity terahertz quantum cascade lasers”
    13 – T.T. Lin (RIKEN, Japan) “AlGaAs/GaAs quantum cascade lasers with variable Al composition barriers lasing at 3.7 THz”
    14 – F. Mezzapesa (University of Bari, Italy) “Intrinsic Stability of Terahertz Quantum Cascade Lasers Subjected to Strong Optical Feedback”
    15 – H. Moser (Inst. of Chemical Technologies and Analytics, Vienna, Austria) “Hydrogen Sulfide sensing using ring cavity surface emitting QCLs around 8μm”
    16 – P. Patimisco (University of Bari, Italy) “Quartz-enhanced photoacoustic sensor coupled with high-finesse optical cavity”
    17 – M. Rosch (ETHZ, Switzerland) “Broadband monolithic extractor for THz quantum cascade lasers”
    18 – M. Sasaki (RIKEN, Japan) “Design for realizing stable lasing of low frequency (< 2 THz) 4-levels indirect injection scheme THz-QCL”
    19 – A. Sampaolo (University of Bari, Italy) “Quartz-Enhanced Photoacoustic Spectroscopy of H2S”
    20 – S. Schönhuber (Vienna University of Technology, Vienna, Austria) “Novel Photonic Concepts for THz QCLs: Coupled Microdisk Cavities and Random Lasers”
    21 – W. Terashima (RIKEN, Japan) “THz Emission from GaN-based Quantum Cascade Structure with Pure 3 Levels Laser System”
    22 – F. Valmorra (ETHZ, Switzerland) “InGaAs/AlInGaAs THz Quantum Cascade Lasers operating up to 195K in strong magnetic field”
    23 – N. Vukovic (University of Belgrade, Serbia) “Effects of Conduction-band Nonparabolicity on Electronic Structure and Gain of THz Quantum Cascade Laser in Magnetic field”
    24 – Y. Wang (Texas A&M University, USA) “Modeling of actively mode locked quantum cascade lasers: the effect of the gain recovery time”
    25 – M. Wienold (Paul-Drude-Institut, Berlin, Germany) “A Continuously Tunable Multimode Terahertz Quantum-Cascade Laser”
    26 – D. O. Winge (Lund University, Sweden) “Microscopic Modeling of Second Harmonic Generation in Quantum Cascade Lasers”
    27 – H. Yasuda (National Institute of Information and Communications Technology, Japan) “GaInP/AlGaInP material system for high-temperature THz-QCL operation”
    28 – J. P. Waclawek (Inst. of Chemical Technologies and Analytics, Vienna, Austria) “Quartz-Enhanced Photoacoustic Spectroscopy Based Carbon Disulfide Detection Using a CW DFB-QCL”
    29 – T. Zederbauer (Vienna University of Technology, Vienna, Austria) “Various Barrier Materials for Terahertz Quantum Cascade Lasers”
    30 – P. Dean (University of Leeds, UK) “Electrical feedback control of a THz QCL under optical feedback”