Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Chun Wang Ivan Chan"'
Autor:
David Burghoff, Tsung-Yu Kao, Yang Yang, Xiaowei Cai, D. J. Hayton, Ningren Han, John L. Reno, Chun Wang Ivan Chan, Qing Hu, Jian-Rong Gao
Publikováno v:
Nature Photonics. 8:462-467
Frequency combs based on terahertz quantum cascade lasers, which combine the high power of lasers with the broadband capabilities of pulsed sources, are demonstrated. The frequency combs generate 5 mW of terahertz power covering a frequency range of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b5d1ca59cd64b700c5f7d6529091bdc
https://doi.org/10.1038/nphoton.2014.85
https://doi.org/10.1038/nphoton.2014.85
Publikováno v:
Nature Physics. 7:166-171
Quantum cascade lasers can operate at terahertz frequencies because they use intraband, rather than interband, transitions in semiconductor nanostructures. However, they seemed to have reached a ceiling in terms of maximum operating temperature. This
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6299c3f3eded6066d825949a4902f5dc
https://doi.org/10.1038/nphys1846
https://doi.org/10.1038/nphys1846
Autor:
Ningren Han, John L. Reno, David Burghoff, Chun Wang Ivan Chan, Alexander de Geofroy, Qing Hu, Alan Wei Min Lee
Publikováno v:
Optics letters. 39(12)
In this work, we demonstrate all-electronically tunable terahertz quantum cascade lasers (THz QCLs) with MEMS tuner structures. A two-stage MEMS tuner device is fabricated by a commercial open-foundry process performed by the company MEMSCAP. This pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39ad5d3c3b24624b28e59d419aa08b2b
https://pubmed.ncbi.nlm.nih.gov/24978516
https://pubmed.ncbi.nlm.nih.gov/24978516
Autor:
Ningren Han, Jian-Rong Gao, Chun Wang Ivan Chan, Qing Hu, D. J. Hayton, Tsung-Yu Kao, David Burghoff, John L. Reno
Publikováno v:
CLEO: 2014.
We demonstrate broadband terahertz laser frequency combs, compact semiconductor devices that combine the high power of lasers with the broad spectra of pulsed sources.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2992a724c690e0f038064633779da90f
https://doi.org/10.1364/cleo_si.2014.sth4g.6
https://doi.org/10.1364/cleo_si.2014.sth4g.6
Autor:
Andreas Wacker, Dayan Ban, S. G. Razavipour, Emmanuel Dupont, Qing Hu, H. C. Liu, Z. R. Wasilewski, Chun Wang Ivan Chan, M. Lindskog, G. C. Aers, S. R. Laframboise, Saeed Fathololoumi
Publikováno v:
Journal of Applied Physics; 113(20), no 203107 (2013)
We designed and demonstrated a terahertz quantum cascade laser based on indirect pump injection to the upper lasing state and phonon scattering extraction from the lower lasing state. By employing a rate equation formalism and a genetic algorithm, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::953feddba4551ff5a09a3300da7be394
https://doi.org/10.1063/1.4807580
https://doi.org/10.1063/1.4807580
Autor:
Shengxi Huang, S. G. Razavipour, Emmanuel Dupont, Z. R. Wasilewski, S. R. Laframboise, Qing Hu, Dayan Ban, H. C. Liu, Chun Wang Ivan Chan, Saeed Fathololoumi
We experimentally investigated the effect of oscillator strength (radiative transition diagonality) on the performance of resonant phonon-based terahertz quantum cascade lasers that have been optimized using a simplified density matrix formalism. Our
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcd7222d49d319e1915f517462cfdf59
https://nrc-publications.canada.ca/eng/view/object/?id=42a89c03-276e-440f-9310-9f2e21b6b756
https://nrc-publications.canada.ca/eng/view/object/?id=42a89c03-276e-440f-9310-9f2e21b6b756
Autor:
Saeed Fathololoumi, Dayan Ban, Alpár Mátyás, Chun Wang Ivan Chan, Christian Jirauschek, Emmanuel Dupont, Z. R. Wasilewski, H. C. Liu, S. R. Laframboise, Qing Hu
Publikováno v:
Optics express. 20(4)
A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is achieved by optimizing the lasing transition oscillator strength of the resonant phonon based three-well design. The optimum oscillator strength of 0.58 was found
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdbfd2147afee87f1df9836896558bd2
https://pubmed.ncbi.nlm.nih.gov/22418143
https://pubmed.ncbi.nlm.nih.gov/22418143
Publikováno v:
IndraStra Global.
A hybrid Monte Carlo-density matrix transport simulator is used to analyze the transport properties of resonant-phonon type terahertz quantum cascade lasers. By comparing calculated and experimental results, the importance of stimulated emission to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01fd5a38fd02e6986ab2488c6cf3ced0
http://dspace.library.iitb.ac.in/jspui/handle/100/15979
http://dspace.library.iitb.ac.in/jspui/handle/100/15979
Publikováno v:
Novel In-Plane Semiconductor Lasers X.
We demonstrate a terahertz quantum-cascade laser (QCL) operating significantly above the temperature of hv/kB, which had so-far been been an empirical limitation for the maximum operating temperature of these devices. With a design that employs a new
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0317c9d9b58c3c815b6665d4ce1964e9
https://doi.org/10.1117/12.875686
https://doi.org/10.1117/12.875686
Publikováno v:
Conference on Lasers and Electro-Optics 2010.
The maximum operating temperature of previously reported terahertz quantum-cascade lasers (QCLs) has empirically been limited to a value of ∼/kB. Here, we report a new design scheme for terahertz QCLs and achieve 163-K operation for a 1∶8-THz QCL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e125aa84331271a62ecffe2cac27d38
https://doi.org/10.1364/cleo.2010.cthu1
https://doi.org/10.1364/cleo.2010.cthu1