Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Chengao Wang"'
Autor:
David J. Benson, Neil F. Baril, Yopugqian Gao, Dmitri A. Tenne, Douglas V. Pete, Chengao Wang, Chih-Feng Wang, Gennady A. Smolyakov, Fei H. Chu, Alexander A. Ukhanov, Kevin J. Malloy, Jaime-Vasquez Marvin
Publikováno v:
Nanoimaging and Nanospectroscopy VI.
Actoprobe team had developed custom Tip Enhancement Raman Spectroscopy System (TERS) with specially developed Ultra High Aspect Ratio probes for AFM and TERS measurements for small pixel infrared FPA sidewall characterization. Using this system, we r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20f41550a440c6cac440e20eda1d2396
https://doi.org/10.1117/12.2504541
https://doi.org/10.1117/12.2504541
Publikováno v:
Journal of Applied Physics; May2011, Vol. 109 Issue 9, p093108, 10p, 3 Diagrams, 2 Charts, 13 Graphs
Autor:
Nathan Giannini, Alexander R. Albrecht, Mansoor Sheik-Bahae, Chengao Wang, Seth D. Melgaard, J.R. Silva
Publikováno v:
SPIE Proceedings.
Laser cooling in InGaP|GaAs double heterostructures (DHS) has been a sought after goal. Even though very high external quantum efficiency (EQE) has been achieved, background absorption has remained a bottleneck in achieving net cooling. The purpose o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfb9abeb75a725ceb7cdca664bda0eb4
https://doi.org/10.1117/12.2080087
https://doi.org/10.1117/12.2080087
Publikováno v:
SPIE Proceedings.
The state of current research in laser cooling of semiconductors is reviewed. Record external quantum efficiency (99.5%) is obtained for a GaAs/InGaP heterostructure bonded to a dome lens at 100 K by All-optical Scanning Laser Calorimetry (ASLC). Pul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb80c72473fad9f68a33c7e6143dc0dc
https://doi.org/10.1117/12.2007519
https://doi.org/10.1117/12.2007519
Publikováno v:
IEEE Photonics Technology Letters. 16:2248-2250
It is proposed that the switching power of symmetric one-coupling-length nonlinear directional couplers (NLDC) with variable coupling coefficient (VCC) can be calculated as the weighted average of the local critical power of the coupler. Further, it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::896cb9944c90de492023374a600bb780
https://doi.org/10.1109/lpt.2004.834496
https://doi.org/10.1109/lpt.2004.834496
Publikováno v:
IEEE Photonics Technology Letters. 16:1652-1654
Genetic algorithm is adopted to give an automatic design scheme for fiber-based optical parametric amplifiers (FOPAs). Main steps of the optimization process and discussion about this algorithm are presented. The results show that present FOPA has mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::573cf41e6e4bcb6cf9234364aa4b225a
https://doi.org/10.1109/lpt.2004.828541
https://doi.org/10.1109/lpt.2004.828541
Autor:
Chengao Wang, Mansoor Sheik-Bahae
Publikováno v:
Optical Engineering. 56:011106
External quantum efficiency (EQE) is a parameter widely used in various photonic devices. In laser refrigeration of solids, materials with high EQE are essential for achieving net cooling. Pulsed power-dependent photoluminescence measurement is devel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8808098894a3f5d1c8b73d67ea65c1d
https://doi.org/10.1117/1.oe.56.1.011106
https://doi.org/10.1117/1.oe.56.1.011106
Publikováno v:
Nanostructured Materials. 5:489-496
There were two sorts of black mirrors in ancient China: Heiqigu and common black mirrors (CBM). Their surface layers of about 100 μm thickness were studied by XRD, HREM, and Roman spectrometry. It was proved that the layers were mainly composed of n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2581e2bd2dea9694c071a8d8e24fb0f5
https://doi.org/10.1016/0965-9773(95)00258-g
https://doi.org/10.1016/0965-9773(95)00258-g
Autor:
Michael P. Hasselbeck, Mansoor Sheik-Bahae, Thomas J. Rotter, Chia-Yeh Li, Kevin J. Malloy, Jerry M. Olson, Chengao Wang
Publikováno v:
SPIE Proceedings.
External quantum efficiency of semiconductor photonic devices is directly measured by wavelength-dependent laser-induced temperature change (scanning laser calorimetry) with very high accuracy. Maximum efficiency is attained at an optimum photo-excit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e5a91af512007d6680343ec1a8b02f7
https://doi.org/10.1117/12.878979
https://doi.org/10.1117/12.878979
Publikováno v:
ResearcherID
We characterize high quantum efficiency double GaAs/InGaP heterostructures used in semiconductor laser cooling. To identify potential samples for laser cooling, measuring the nonradiative recombination rate coefficient is necessary. We describe a tec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77235877d64b5f7bec45d13d979ba5c7
https://doi.org/10.1117/12.845054
https://doi.org/10.1117/12.845054