Search Results - "KAN, Hirofumi"

Demonstration of an ultraviolet 336 nm AlGaN multiple-quantum-well laser diode by Yoshida, Harumasa, Yamashita, Yoji, Kuwabara, Masakazu, Kan, Hirofumi

“…We have demonstrated laser operation of an AlGaN multiple-quantum-well (MQW) laser diode (LD) with a peak wavelength of 336.0 nm under pulsed current mode at…”
Get full text

Whispering-gallery mode resonators for highly unidirectional laser action by Wang, Qi Jie, Yan, Changling, Yu, Nanfang, Unterhinninghofen, Julia, Wiersig, Jan, Pflügl, Christian, Diehl, Laurent, Edamura, Tadataka, Yamanishi, Masamichi, Kan, Hirofumi, Capasso, Federico

“…Optical microcavities can be designed to take advantage of total internal reflection, which results in resonators supporting whispering-gallery modes (WGMs)…”
Get full text

Blue-light emission at room temperature from Ar+-irradiated SrTiO3 by Kan, Daisuke, Terashima, Takahito, Kanda, Ryoko, Masuno, Atsunobu, Tanaka, Kazunori, Chu, Shucheng, Kan, Hirofumi, Ishizumi, Atsushi, Kanemitsu, Yoshihiko, Shimakawa, Yuichi, Takano, Mikio

“…Oxide-based electronic devices are expected to have fascinating properties, unlike those made from conventional semiconductors. SrTiO3 (STO) is a key material…”
Get full text

Radiative and nonradiative recombination in an ultraviolet GaN/AlGaN multiple-quantum-well laser diode by Yoshida, Harumasa, Kuwabara, Masakazu, Yamashita, Yoji, Uchiyama, Kazuya, Kan, Hirofumi

“…We have experimentally investigated the radiative and nonradiative recombination in a GaN/AlGaN multiple-quantum-well laser diode. The each carrier lifetime…”
Get full text

A 342-nm ultraviolet AlGaN multiple-quantum-well laser diode by YOSHIDA, Harumasa, YAMASHITA, Yoji, KUWABARA, Masakazu, KAN, Hirofumi

Get full text

Theory of the Intrinsic Linewidth of Quantum-Cascade Lasers: Hidden Reason for the Narrow Linewidth and Line-Broadening by Thermal Photons by Yamanishi, M., Edamura, T., Fujita, K., Akikusa, N., Kan, H.

“…We have developed a theory of the intrinsic linewidths of laser output of single-mode quantum-cascade (QC) lasers in mid-infrared and terahertz (THz) ranges…”
Get full text

Cryogenic temperature characteristics of Verdet constant on terbium gallium garnet ceramics by Yasuhara, Ryo, Tokita, Shigeki, Kawanaka, Junji, Kawashima, Toshiyuki, Kan, Hirofumi, Yagi, Hideki, Nozawa, Hoshiteru, Yanagitani, Takagimi, Fujimoto, Yasushi, Yoshida, Hidetsugu, Nakatsuka, Masahiro

“…As the first demonstration of Faraday effect in a TGG ceramics, its Verdet constant at 1053 nm is evaluated to be 36.4 rad/Tm at room temperature which is same…”
Get full text

The current status of ultraviolet laser diodes by Yoshida, Harumasa, Kuwabara, Masakazu, Yamashita, Yoji, Uchiyama, Kazuya, Kan, Hirofumi

“…We report on nitride laser diode lasing at short ultraviolet wavelengths. We first present room temperature operations of GaN/AlGaN multiple‐quantum‐well (MQW)…”
Get full text

Cesium vapor laser pumped by a volume-Bragg-grating coupled quasi-continuous-wave laser-diode array by Wang, You, Kasamatsu, Tadashi, Zheng, Yujin, Miyajima, Hirofumi, Fukuoka, Hirotake, Matsuoka, Shinichi, Niigaki, Minoru, Kubomura, Hiroyuki, Hiruma, Teruo, Kan, Hirofumi

“…The experimental demonstration of a broad-area Quasi-continuous-wave (QCW) laser-diode array pumped cesium vapor laser is reported in this letter according to…”
Get full text

Indirect pump scheme for quantum cascade lasers: dynamics of electron-transport and very high T0-values by Yamanishi, Masamichi, Fujita, Kazuue, Edamura, Tadataka, Kan, Hirofumi

Get full text

Integrated AlGaAs Quantum-Well Ridge-Structure Two-Wavelength Distributed Bragg Reflector Laser for Terahertz Wave Generation by Uemukai, Masahiro, Ishida, Hidenao, Ito, Akira, Suhara, Toshiaki, Kitajima, Hidenori, Watanabe, Akiyoshi, Kan, Hirofumi

“…An integrated two-wavelength distributed Bragg reflector (DBR) laser consisting of two DBR lasers and a Y-branch waveguide amplifier was designed and…”
Get full text

Gain competition in dual wavelength quantum cascade lasers by Geiser, Markus, Pflügl, Christian, Belyanin, Alexey, Wang, Qi Jie, Yu, Nanfang, Edamura, Tadanaka, Yamanishi, Masamichi, Kan, Hirofumi, Fischer, Milan, Wittmann, Andreas, Faist, Jérôme, Capasso, Federico

“…We investigated dual wavelength mid-infrared quantum cascade lasers based on heterogeneous cascades. We found that due to gain competition laser action tends…”
Get full text

High-performance UV emitter grown on high-crystalline-quality AlGaN underlying layer by Tsuzuki, Hirotoshi, Mori, Fumiaki, Takeda, Kenichiro, Ichikawa, Tomoki, Iwaya, Motoaki, Kamiyama, Satoshi, Amano, Hiroshi, Akasaki, Isamu, Yoshida, Harumasa, Kuwabara, Masakazu, Yamashita, Yoji, Kan, Hirofumi

“…Al0.25Ga0.75N films were grown on a grooved‐Al0.25Ga0.75N/ AlN/sapphire template by MOVPE. The dislocation density on the grooved areas was as low as 1 × 108…”
Get full text

High efficiency 125 J second-harmonic generation from CsLiB_6O_10 nonlinear crystal by diode-pumped Nd:glass laser by Sekine, Takashi, Sakai, Hiroshi, Takeuchi, Yasuki, Hatano, Yuma, Kawashima, Toshiyuki, Kan, Hirofumi, Kawanaka, Junji, Miyanaga, Noriaki, Norimatsu, Takayoshi

Get full text

Approaches of output improvement for a cesium vapor laser pumped by a volume-Bragg-grating coupled laser-diode-array by Wang, You, Niigaki, Minoru, Fukuoka, Hirotake, Zheng, Yujin, Miyajima, Hirofumi, Matsuoka, Shinichi, Kubomura, Hiroyuki, Hiruma, Teruo, Kan, Hirofumi

“…We report the approaches of output improvement for a cesium vapor laser, which was pumped by a volume-Bragg-grating (VBG) coupled broad-area laser-diode-array…”
Get full text

Effects of a Fixed Combination of Losartan With Hydrochlorothiazide on Glucose Tolerance in Hypertensive Patients Uncontrolled with Angiotensin II Receptor Blockers Alone by Yamamuro, Megumi, Yamamoto, Koichiro, Kan, Hirofumi, Takashio, Seiji, Tayama, Shinji, Kaikita, Koichi, Hokimoto, Seiji, Sumida, Hitoshi, Sugiyama, Seigo, Ogawa, Hisao

“…Aim: The concomitant use of angiotensin II receptor blocker (ARB) with low doses of hydrochlorothiazide (HCTZ) may provide additional antihypertensive…”
Get full text

Fast-Response and Low-Afterglow Cerium-Doped Lithium 6 Fluoro-Oxide Glass Scintillator for Laser Fusion-Originated Down-Scattered Neutron Detection by Murata, T., Arikawa, Y., Watanabe, K., Yamanoi, K., Cadatal-Raduban, M., Nagai, T., Kouno, M., Sakai, K., Nakazato, T., Shimizu, T., Sarukura, N., Nakai, M., Norimatsu, T., Nishimura, H., Azechi, H., Yoshikawa, A., Fujino, S., Yoshida, H., Izumi, N., Sato, N., Kan, H.

“…Scintillation properties of Ce 3+ -doped 20Al(PO 3 ) 3 -80LiF glasses were investigated in order to seek a candidate for down-scattered neutron scintillator in…”
Get full text

Efficient Silicon Light-Emitting-Diodes with a p-Si/Ultrathin SiO2/n-Si Structure by Chu, Shucheng, Kan, Hirofumi

“…We report the efficient enhancement of light emission from silicon crystal by covering the silicon surface with an ultrathin (several nm) SiO2 layer. The…”
Get full text

Efficient Silicon Light-Emitting-Diodes with a p-Si/Ultrathin SiO 2 /n-Si Structure by Chu, Shucheng, Kan, Hirofumi

“…We report the efficient enhancement of light emission from silicon crystal by covering the silicon surface with an ultrathin (several nm) SiO 2 layer. The…”
Get full text

Integrated AlGaAs Quantum-Well Ridge-Structure Two-Wavelength Distributed Bragg Reflector Laser for Terahertz Wave Generation by Uemukai, Masahiro, Ishida, Hidenao, Ito, Akira, Suhara, Toshiaki, Kitajima, Hidenori, Watanabe, Akiyoshi, Kan, Hirofumi

Get full text