Ken Sakuma

Improvement on asymmetry of low-loss waveguides written in pure silica glass by femtosecond laser pulses

Takeshi Fukuda, Shimon Ishikawa, Tomoko Fujii, 2004, SPIE/OSA/IEEE Asia Communications and Photonics.

Low-loss optical waveguides written by femtosecond laser pulses for three-dimensional photonic devices

Takeshi Fukuda, Shimon Ishikawa, Tomoko Fujii, 2004, SPIE LASE.

White Light-Emitting Diode Lamps Using Oxynitride and Nitride Phosphor Materials

Naoki Kimura, Yoshinobu Yamamoto, Masakazu Ohashi, 2005, IEICE Trans. Electron..

Highly efficient white-light-emitting diodes fabricated with short-wavelength yellow oxynitride phosphors

Mamoru Mitomo, Naoto Hirosaki, Ken Sakuma, 2006 .

C-9-1 High Luminous Efficiency Warm White Light-emitting Diode using α-SiAlON phosphor

Daiichiro Tanaka, Naoto Hirosaki, Ken Sakuma, 2005 .

Wavelength-tunable and thermally stable Li-α-sialon:Eu2+ oxynitride phosphors for white light-emitting diodes

Mamoru Mitomo, Naoto Hirosaki, Ken Sakuma, 2006 .

Extrahigh color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode

Naoto Hirosaki, Ken Sakuma, Rong-Jun Xie, 2007 .

2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors

Mamoru Mitomo, Naoto Hirosaki, Ken Sakuma, 2007 .