(19)

(11)

EP 1 228 557 A2

(12)

(88) Date of publication A3: 25.10.2001 (43) Date of publication: 07.08.2002 Bulletin 2002/32 (21) Application number: 00991716.2 (22) Date of filing: 01.11.2000

(51) International Patent Classification (IPC)7: H01S 5/343 (86) International application number: PCT/US0041/775 (87) International publication number: WO 0133/677 (10.05.2001 Gazette 2001/19)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR (30) Priority: 01.11.1999 US 162813 P (71) Applicant: Arizona Board of Regents Tempe, AZ 85287-6006 (US)	(72) Inventors: JOHNSON, Shane Chandler, AZ 85225 (US) DOWD, Philip,School of Electrical Engineering Singapore 6397981 (SG) BRAUN, W.,Paul-Drude Inst. for Solid State Elect. D-10117 Berlin (DE) ZHANG, Yong-Hang Scottsdale, AZ 85260 (US) GUO, Chang-Zhi Beijing 100084 (CN) (74) Representative: Copsey, Timothy Graham et al Kilburn & Strode,20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)