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Terahertz confocal microscopy with a quantum cascade laser source

R. U. Siciliani de Cumis, J.-H. Xu, L. Masini, R. Degl'Innocenti, P. Pingue, P.A. Benedetti, A. Tredicucci, M.S. Vitiello
2012 2012 37th International Conference on Infrared, Millimeter, and Terahertz Waves  
Terahertz confocal microscopy with a quantum cascade laser source Summary The recent advances in generation, manipulation and detection of Terahertz (THz) radiation have been accompanied by a growing  ...  The recent invention of quantum cascade lasers (QCL) emitting at THz frequencies is enabling a major step forward in THz imaging technologies thanks to the availability of a powerful, compact, solid-state  ... 
doi:10.1109/irmmw-thz.2012.6380355 fatcat:gvdhkx7pvfbfzlh26zspiinw74

Terahertz frequency quantum cascade lasers for use as waveguide-integrated local oscillators

E. H. Linfield, A. Valavanis, Y. J. Han, L. H. Li, J. X. Zhu, R. Dong, P. Dean, A. G. Davies, N. Brewster, L. Bushnell, M. Oldfield, B. N. Ellison
2016 2016 10th European Conference on Antennas and Propagation (EuCAP)  
Linfield, EH, Valavanis, A orcid.org/0000-0001-5565-0463, Han, YJ orcid.org/0000-0003-2141-3077 et al. (9 more authors) (2016) Terahertz frequency quantum cascade lasers for use as waveguide-integrated  ...  AbstractÑSince their first demonstration in 2002, the performance of terahertz frequency quantum cascade lasers has developed extremely rapidly.  ...  TERAHERTZ FREQUENCY QUANTUM CASCADE LASERS Since their first demonstration, progress in developing THz QCLs has been rapid.  ... 
doi:10.1109/eucap.2016.7481523 fatcat:5x33urzlhvbhtcrchmbirc4pf4

Terahertz confocal microscopy with a quantum cascade laser source

Ugo Siciliani de Cumis, Ji-Hua Xu, Luca Masini, Riccardo Degl'Innocenti, Pasqualantonio Pingue, Fabio Beltram, Alessandro Tredicucci, Miriam S. Vitiello, Pier Alberto Benedetti, Harvey E. Beere, David A. Ritchie
2012 Optics Express  
Terahertz confocal microscopy with a quantum cascade laser source Summary The recent advances in generation, manipulation and detection of Terahertz (THz) radiation have been accompanied by a growing  ...  The recent invention of quantum cascade lasers (QCL) emitting at THz frequencies is enabling a major step forward in THz imaging technologies thanks to the availability of a powerful, compact, solid-state  ... 
doi:10.1364/oe.20.021924 pmid:23037342 fatcat:omjbzn2ozbg7dhfoi6no6h6enq

Stabilizing a terahertz quantum-cascade laser using near-infrared optical excitation

Tasmim Alam, Martin Wienold, Xiang Lu, Lutz Schrottke, Holger T. Grahn, Heinz-Wilhelm Hubers
2019 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)  
We demonstrate a technique to simultaneously stabilize the frequency and output power of a terahertz quantumcascade laser.  ...  By locking the frequency to a molecular absorption line, we obtain a linewidth of about 260 kHz and root-mean-square power fluctuations as low as 0.03%.  ...  V., Hausvogteiplatz 5−7, 10117 Berlin, GermanyStabilizing a terahertz quantum-cascade laser using near-infrared optical excitation  ... 
doi:10.1109/irmmw-thz.2019.8873858 fatcat:brhhsa5htbft3cdnyzqsaqkziu

Terahertz quantum cascade lasers — The past, present, and potential future

Edmund H. Linfield, A. Giles Davies, Paul Dean
2015 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)  
AbstractÑSince their first demonstration in 2002, the development of terahertz frequency quantum cascade lasers has been extremely rapid.  ...  We overview some of the advances that have taken place and which have made the terahertz quantum cascade laser such a ubiquitous source.  ... 
doi:10.1109/irmmw-thz.2015.7327749 fatcat:giz5gqfanfgf5hg6bbd4cmige4

Short pulse generation and high power emission of Quantum Cascade lasers

D. Bachmann, M. Rosch, M. Kainz, S. Schonhuber, M. Brandstetter, G. Scalari, M. Beck, J. Faist, M.A. Andrews, G. Strasser, J. Darmo, K. Unterrainer
2017 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)  
A unique feature of Quantum Cascade lasers is the possibility to stack active regions.  ...  Using a three stack heterogeneous Quantum Cascade laser ultra broadband amplification and short pulse generation is demonstrated. High power output is achieved by two stacked symmetric active regions.  ...  The spectral gain of a multi-stack terahertz quantum cascade laser, composed of three individually designed active regions, is studied as a function of bias and temperature using terahertz time-domain  ... 
doi:10.1109/irmmw-thz.2017.8067124 fatcat:mvvrnfeu4zh7rcy2kdaay5llpm

2020 Index IEEE Transactions on Terahertz Science and Technology Vol. 10

2020 IEEE Transactions on Terahertz Science and Technology  
THz-Quantum Cascade Lasers.  ...  Hassona, A., +, TTHZ May 2020 321-330 Quantum Transmission Line Modeling and Experimental Investigation of the Output Characteristics of a Terahertz Quantum Cascade Laser.  ... 
doi:10.1109/tthz.2020.3037567 fatcat:gmfowpt735c7fizimkmhev3rpm

Toward Silicon-Based Lasers for Terahertz Sources

Stephen A. Lynch, Douglas J. Paul, Paul Townsend, Guy Matmon, Zhang Suet, Robert W. Kelsall, Zoran Ikonic, Paul Harrison, Jing Zhang, David J. Norris, Anthony G. Cullis, Carl R. Pidgeon (+6 others)
2006 IEEE Journal of Selected Topics in Quantum Electronics  
This paper reviews the recent advances in the search for a siliconbased terahertz laser.  ...  Producing an electrically pumped silicon-based laser at terahertz frequencies is gaining increased attention these days.  ...  MATERIAL GROWTH ISSUES While a III-V terahertz quantum cascade laser has already been demonstrated [1] , a silicon-based quantum cascade laser is yet to be realized.  ... 
doi:10.1109/jstqe.2006.884069 fatcat:z4hxqtntofe3rjnxj2ovhb3ps4

Front Matter: Volume 10103

2017 Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X  
A unique citation identifier (CID) number is assigned to each article at the time of publication.  ...  using a Base 36 numbering system employing both numerals and letters.  ...  Session 14 began with a talk waveguide development using wafer fused GaP/GaAs in THz quantum cascade lasers, followed by talks on printing sub-THz wire grid polarizers using a composite liquid metal ink  ... 
doi:10.1117/12.2276637 fatcat:eefedbn3mjge3hrqtk2o7qzpym

Beam patterns of terahertz quantum cascade lasers with subwavelength cavity dimensions

A. J. L. Adam, I. Kašalynas, J. N. Hovenier, T. O. Klaassen, J. R. Gao, E. E. Orlova, B. S. Williams, S. Kumar, Q. Hu, J. L. Reno
2006 Applied Physics Letters  
To assess the influence of such dimensions on the shape of the laser emission, we have measured the beam pattern of two metal-metal cavity quantum cascade lasers.  ...  The quest for terahertz sources has resulted recently in the development of the terahertz quantum cascade laser ͑QCL͒. 1 At present, continuous-wave ͑cw͒ QCLs in the terahertz range have been demonstrated  ...  Two of the authors ͑A. J. L. A. and I. K.͒ gratefully acknowledge support through the  ... 
doi:10.1063/1.2194889 fatcat:r5xv4ylsjzeilc46kb2yhevyfq

Laser physics: A phase it's going through

David S. Citrin
2007 Nature  
When we observe laser light, we typically measure its intensity, and so wave amplitude.  ...  The phase, which encodes further details of the laser's internal workings, was obscure -but fresh light is being shed on it.  ...  Kröll and colleagues' approach 2 involves injecting a separate pulsed terahertz wave into the gain medium of a quantum cascade laser operating at about 2.9 THz.  ... 
doi:10.1038/449669a pmid:17928849 fatcat:xclag7s2vbbvvkyo4zucbp7ymi

Repetition frequency locking of a terahertz quantum cascade laser emitting at 4.2 THz

Wen Guan, Ziping Li, Kang Zhou, Wenjian Wan, Xiaoyu Liao, Yiran Zhao, Sijia Yang, J. C. Cao, Hua Li
2020 Terahertz Science and Technology  
The electrically-pumped terahertz quantum cascade laser (QCL) is characterized by high power emission, compact, broad frequency coverage, and so on, which shows abilities for frequency comb operations.  ...  In this work, we have reported a repetition frequency locking of a terahertz QCL emitting around 4.2 THz.  ...  antennas [6] , vacuum tubes [7] , quantum cascade lasers (QCLs) [8] [9] , and so on.  ... 
doi:10.1051/tst/2020131032 fatcat:i37hhitrgfgqvophcgozezzbbm

High-temperature performance and broad continuous tunability of terahertz quantum-cascade lasers

Sushil Kumar, Qi Qin, Chun W. I. Chan, Qing Hu, John L. Reno, Alexey A. Belyanin, Peter M. Smowton
2011 Novel In-Plane Semiconductor Lasers X  
We demonstrate a terahertz quantum-cascade laser (QCL) operating significantly above the temperature of hν/k B , which had so-far been been an empirical limitation for the maximum operating temperature  ...  A unique concept of altering the lateral mode profile of the "wire laser" waveguide geometry was implemented to achieve tuning despite the strong mode confinement of metal-metal waveguides at terahertz  ...  The work was performed in part at the United States Department of Energy, Center for Integrated Nanotechnologies, and Sandia National Laboratories (Contract DE-AC04-94AL85000).  ... 
doi:10.1117/12.875686 fatcat:ig2sh6hzsnerplqqxkuoydgwj4

Introduction to Special Issue on Terahertz Metrology

Thomas Kleine-Ostmann
2014 Journal of Infrared, Millimeter and Terahertz Waves  
as a metrological tool and shows how it is used by the authors for high precision frequency measurements over a very large frequency range.  ...  Terahertz frequency combs: Theoretical aspects and applications by Heiko Füser and Mark Bieler from Physikalisch-Technische Bundesanstalt, the German NMI in Braunschweig, introduces the THz frequency comb  ...  Novel detector for traceable THz power measurements by Ralf Müller, Matthias Kehrt, Characterizing the beam properties of terahertz quantum-cascade lasers by Heiko Richter, Nick Rothbart, and Heinz-Wilhelm  ... 
doi:10.1007/s10762-014-0075-y fatcat:y7tn3ti4snffpjw3urodfju7mu

6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors

Hua Li, Wen-Jian Wan, Zhi-Yong Tan, Zhang-Long Fu, Hai-Xia Wang, Tao Zhou, Zi-Ping Li, Chang Wang, Xu-Guang Guo, Jun-Cheng Cao
2017 Scientific Reports  
As an example, the 6.2-GHz modulated terahertz light emitted from a Fabry-Pérot terahertz quantum cascade laser is successfully detected using the fast terahertz quantum well photodetector.  ...  In addition to the fast terahertz detection, the technique presented in this work can also facilitate the frequency stability or phase noise characterizations for terahertz quantum cascade lasers.  ...  Acknowledgements The authors thank Stefano Barbieri for discussions on fast terahertz detectors. This work was supported by the "Hundred- Talent  ... 
doi:10.1038/s41598-017-03787-6 pmid:28615654 pmcid:PMC5471194 fatcat:qzidks6cr5d2xdomk5ssqqcc7a
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