- Optics Letters, Vol. 34, Issue 2, pp. 175-177 (January 2009)
- Tomomasa Ohkubo, Takashi Yabe, Kunio Yoshida, Shigeaki Uchida, Takayuki Funatsu, Behgol Bagheri, Takehiro Oishi, Kazuya Daito, Manabu Ishioka, Yuichirou Nakayama, Norihito Yasunaga, Kouichirou Kido, Yuji Sato, Choijil Baasandash, Kiyoshi Kato, Takagimi Yanagitani, Yoshiaki Okamoto