Red-shift of emission wavelength caused by reabsorption mechanism of europium activated Ca-α-SiAlON ceramic phosphorsSAKUMA, Ken; HIROSAKI, Naoto; XIE, Rong-Jun et al.Journal of luminescence. 2007, Vol 126, Num 2, pp 843-852, issn 0022-2313, 10 p.Article

Low-loss optical waveguides written by femtosecond laser pulses for three-dimensional photonic devicesFUKUDA, Takeshi; ISHIKAWA, Shimon; FUJII, Tomoko et al.SPIE proceedings series. 2004, pp 524-538, isbn 0-8194-5247-5, 15 p.Conference Paper

Warm-white light-emitting diode with yellowish orange SiAlON ceramic phosphorSAKUMA, Ken; OMICHI, Koji; KIMURA, Naoki et al.Optics letters. 2004, Vol 29, Num 17, pp 2001-2003, issn 0146-9592, 3 p.Article

White light-emitting diode lamps using oxynitride and nitride phosphor materials : Electronic DisplaysSAKUMA, Ken; HIROSAKI, Naoto; KIMURA, Naoki et al.IEICE transactions on electronics. 2005, Vol 88, Num 11, pp 2057-2064, issn 0916-8524, 8 p.Conference Paper

Improvement on asymmetry of low-loss waveguides written in pure silica glass by femtosecond laser pulsesFUKUDA, Takeshi; ISHIKAWA, Shimon; FUJII, Tomoko et al.SPIE proceedings series. 2004, pp 21-28, isbn 0-8194-5174-6, 8 p.Conference Paper