Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Gaolei Chang"'
Publikováno v:
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
We report the realization of terahertz quantum cascade laser based on an antenna array, in which each unit contains two dipole antennas with slightly different widths. The device operates in single mode around 3.2THz, and the radiation efficiency can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c02820efe9485b3822f195e6c4f8a84
https://doi.org/10.1109/irmmw-thz50926.2021.9566857
https://doi.org/10.1109/irmmw-thz50926.2021.9566857
Autor:
Fangfang Wang, Li He, Chenren Yu, Huan Zhu, Gaolei Chang, Gangyi Xu, Jianxin Chen, Haiqing Zhu
Publikováno v:
Journal of Crystal Growth. 514:98-102
We report a method to measure the net loss and gain of a terahertz quantum cascade laser (THz-QCL), which is based on a master-oscillator power-amplifier (MOPA) configuration. In the measurement, the master-oscillator (MO) section and power-amplifier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a6d19f89213daf79c7a446aa45581f7
https://doi.org/10.1016/j.jcrysgro.2019.03.001
https://doi.org/10.1016/j.jcrysgro.2019.03.001
Autor:
Fangfang Wang, Haiqing Zhu, Zhou Tang, Edmund H. Linfield, Pingping Chen, Huan Zhu, Li He, Wei Lu, Chenren Yu, Gangyi Xu, Jianxin Chen, Gaolei Chang, Lianhe Li, A. Giles Davies
Publikováno v:
Optics express. 28(16)
A model based on carrier rate equations is proposed to evaluate the gain saturation and predict the dependence of the output power of a terahertz master-oscillator power-amplifier quantum cascade laser (THz-MOPA-QCL) on the material and structure par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9771c59ac0042b0949ed4fda53aebd07
https://pubmed.ncbi.nlm.nih.gov/32752323
https://pubmed.ncbi.nlm.nih.gov/32752323
Autor:
Li He, Marilena Giglio, Hongpeng Wu, Lianhe Li, Chenren Yu, Angelo Sampaolo, Gaolei Chang, Pietro Patimisco, Andrea Zifarelli, Fangfang Wang, Giles Davies, Lei Dong, Tingting Wei, Huan Zhu, Vincenzo Spagnolo, Frank K. Tittel, Gangyi Xu, Jianxin Chen, Haiqing Zhu, Edmund H. Linfield
Publikováno v:
Quantum Sensing and Nano Electronics and Photonics XVII.
Many applications such as toxic gas detection or H2S monitoring in natural gas require operation in the THz spectral region, where gas species show distinct spectral “fingerprints” that can be easily discriminated by the gas matrix background abs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a274890707c0e6bdf8a30bff9a3400b
https://doi.org/10.1117/12.2545707
https://doi.org/10.1117/12.2545707
Autor:
A. Giles Davies, Li He, Gaolei Chang, Chenren Yu, Fangfang Wang, Lianhe Li, Haiqing Zhu, Edmund H. Linfield, Gangyi Xu, Jianxin Chen, Huan Zhu
Publikováno v:
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
We demonstrate novel THz quantum cascade lasers with a gain endowed photonic crystal (PhC) and a grating coupler (GC) formed on each end of the ridge. The PhC acts as a reflection mirror with extremely narrow bandwidth, and the GC enables high radiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39c1d688197495be41df9418cac77b27
https://doi.org/10.1109/irmmw-thz.2019.8874227
https://doi.org/10.1109/irmmw-thz.2019.8874227
Publikováno v:
Smart Photonic and Optoelectronic Integrated Circuits XXI.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16748a2a472c77da4502f997d4e41722
https://doi.org/10.1117/12.2512224
https://doi.org/10.1117/12.2512224
Autor:
Huan Zhu, Gangyi Xu, Jianxin Chen, Fangfang Wang, Li He, Haiqing Zhu, Kai Wang, Edmund H. Linfield, Lianhe Li, Gaolei Chang, Chenren Yu, A. Giles Davies
Publikováno v:
Applied Physics Letters. 117:021103
We report the realization of controllable linear-to-circular polarization states in single-mode terahertz master-oscillator power-amplifier quantum cascade lasers (THz-MOPA-QCLs). The MOPA device contains a first-order distributed feedback (DFB) lase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4376d678e123a6af52d4381ed45ce281
https://doi.org/10.1063/5.0013505
https://doi.org/10.1063/5.0013505
Autor:
Pingping Chen, Gangyi Xu, Fangfang Wang, Jianxin Chen, Haiqing Zhu, Zhou Tang, Edmund H. Linfield, Quan Yan, Wei Lu, Huan Zhu, Chenren Yu, Li He, A. Giles Davies, Lianhe Li, Gaolei Chang
Publikováno v:
Optics express. 26(2)
A terahertz master-oscillation power-amplifier quantum cascade laser (THz-MOPA-QCL) is demonstrated where a grating coupler is employed to efficiently extract the THz radiation. By maximizing the group velocity and eliminating the scattering of THz w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b3be1695ebb33edad2938990e4a3036
https://pubmed.ncbi.nlm.nih.gov/29401915
https://pubmed.ncbi.nlm.nih.gov/29401915
Publikováno v:
Optics Express. 26:32675
The radio frequency (RF) modulation is a powerful tool, which is used for generating sidebands in semiconductor lasers for active mode-locking. The two-section coupled-cavity laser geometry shows advantages over traditional Fabry-Pérot cavities in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9509bbc4eec000fb0741c419aa9e7407
https://doi.org/10.1364/oe.26.032675
https://doi.org/10.1364/oe.26.032675
Autor:
Chenren Yu, Fangfang Wang, Shen Changle, Wu Weidong, Gaolei Chang, Wei Lu, Wang Xuemin, Gangyi Xu, Pingping Chen, Jianxin Chen, Li He, Haiqing Zhu, Zhou Tang, Huan Zhu, Jiang Tao
Publikováno v:
Applied Physics Letters. 113:121114
We demonstrate the highly efficient power extraction from terahertz quantum cascade laser (THz-QCL) via a grating coupler (GC). The GC, formed in the top metallization of a Fabry-Perot (FP) THz-QCL with a metal-metal (MM) waveguide, diffracts the THz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49b81001a79ced078f200a460d0a14b1
https://doi.org/10.1063/1.5041977
https://doi.org/10.1063/1.5041977