1. (1) NEDO pamphlet: The Light for the 21st Century, project, March (2000).
2. (2) JRCM home page, http://www.jrcm.or.jp/21ctlight/21ctlight.html.
3. (3) Annual Reports of: The Light for the 21st Century, National project in the fiscal year 2000, JRCM (2001) March.
4. (4) A. Bergh: Compound semiconductor, 6, p. 36(2000).
5. (5) T. Mukai et al., to be published, Photonics West (2003).