Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Kei Kosaka"'
Autor:
Kei Kosaka, Mitsuhiro Tanaka, Shigeaki Sumiya, Makoto Miyoshi, Jicai Zhang, Tomohiko Shibata, Takashi Egawa, Youhua Zhu
Publikováno v:
Japanese Journal of Applied Physics. 47:43-46
AlGaN films and deep ultraviolet light-emitting diode (UV-LED) structures with AlGaN multi-quantum wells (MQWs) were grown directly on 2-in.-diameter epitaxial AlN/sapphire template (AlN template) by metalorganic chemical vapor deposition (MOCVD). It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6a7663fcc9dfbe64bc929698b8a5548
https://doi.org/10.1143/jjap.47.43
https://doi.org/10.1143/jjap.47.43
Publikováno v:
Physical Review B. 82
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4d1fc4ef2fcec78dfcf6241ec8f0b14
https://doi.org/10.1103/physrevb.82.219901
https://doi.org/10.1103/physrevb.82.219901
Publikováno v:
Physical Review B. 81
We have investigated the NMR properties of dilute $^{3}\text{H}\text{e}$ impurities in solid $^{4}\text{H}\text{e}$ contained in a torsional oscillator (TO) by the simultaneous measurement of the NMR and the torsional oscillator response of the so-ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ed8e763d53cfb8d2e8d802044a78223
https://doi.org/10.1103/physrevb.81.214515
https://doi.org/10.1103/physrevb.81.214515
Autor:
T. Sota, Kei Kosaka, Tomohiko Shibata, Akira Uedono, Mitsuhiro Tanaka, Takeyoshi Onuma, Koyu Asai, Shigefusa F. Chichibu, Shigeaki Sumiya
Publikováno v:
Journal of Applied Physics. 105(2):023529-023529-7
Exciton fine structures were observed in partially polarized optical reflectance and cathodoluminescence (CL) spectra of AlN epilayers grown by low-pressure metalorganic vapor phase epitaxy on (0001) Al2O3 substrates. A few free and four bound excito
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9fd887fc7b2810d2c20cb1658454c15
http://hdl.handle.net/10097/47623
http://hdl.handle.net/10097/47623
Autor:
Rajat Sharma, Umesh K. Mishra, Kei Kosaka, John F. Kaeding, Keiichiro Asai, Takeyoshi Onuma, Hirokatsu Ikeda, Tomohiko Shibata, Mitsuhiro Tanaka, Takayuki Sota, James S. Speck, Takuya Hoshi, T. Koyama, Stacia Keller, Kodai Matsukawa, Steven P. DenBaars, P. Cantu, Shuji Nakamura, Mariko Sugawara, Shigefusa F. Chichibu, Takahiro Okamura, Shigeaki Sumiya
Publikováno v:
Journal of Applied Physics. 103:089901
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea7fe1c6d21cb6311ebdfa709bc3c18d
https://doi.org/10.1063/1.2903974
https://doi.org/10.1063/1.2903974
Autor:
Shigeaki Sumiya, Kei Kosaka, Tomohiko Shibata, Youhua Zhu, M. Tanaka, Makoto Miyoshi, Jicai Zhang, T. Egawa
Publikováno v:
Electronics Letters. 44:493
AlGaN-based multiple-quantum-well light-emitting diodes (LEDs) with peak emission at UV-C region of 264 nm were successfully gown on AlN template using metal organic chemical vapour deposition. It was found that a subband emission around 320 nm can b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abbd04164714281572812fbb936500f9
https://doi.org/10.1049/el:20082753
https://doi.org/10.1049/el:20082753
Autor:
Rajat Sharma, Umesh K. Mishra, Kei Kosaka, John F. Kaeding, Keiichiro Asai, Takeyoshi Onuma, Hirokatsu Ikeda, Tomohiko Shibata, Mitsuhiro Tanaka, Takayuki Sota, James S. Speck, Takuya Hoshi, T. Koyama, Stacia Keller, Kodai Matsukawa, Steven P. DenBaars, P. Cantu, Shuji Nakamura, Mariko Sugawara, Shigefusa F. Chichibu, Takahiro Okamura, Shigeaki Sumiya
Publikováno v:
Journal of Applied Physics. 102:123707
The strain dependence of the free-exciton resonance energies in AlN epilayers is presented and the values are analyzed using an appropriate Hamiltonian assuming equibiaxial stress for the wurtzite crystal structure in order to obtain valence band par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5841449165c093b45617416ea14e4ec
https://doi.org/10.1063/1.2825577
https://doi.org/10.1063/1.2825577
Autor:
Ikeda, Hirokatsu, Okamura, Takahiro, Matsukawa, Kodai, Sota, Takayuki, Sugawara, Mariko, Hoshi, Takuya, Cantu, Pablo, Sharma, Rajat, Kaeding, John F., Keller, Stacia, Mishra, Umesh K., Kosaka, Kei, Asai, Keiichiro, Sumiya, Shigeaki, Shibata, Tomohiko, Tanaka, Mitsuhiro, Speck, James S., DenBaars, Steven P., Nakamura, Shuji, Koyama, Takahiro
Publikováno v:
Journal of Applied Physics; Dec2007, Vol. 102 Issue 12, p123707, 5p, 3 Charts, 3 Graphs
Publikováno v:
Journal of Chemical Physics; Feb1968, Vol. 48 Issue 3, p1145-1157, 13p
Publikováno v:
Journal of Chemical Physics; May1967, Vol. 46 Issue 9, p3489-3492, 4p