Room-temperature continuous-wave operation of InGaN multiple-quantum-well laser diodes with an asymmetric waveguide structure

被引:45
作者
Kneissl, M [1 ]
Bour, DP [1 ]
Van de Walle, CG [1 ]
Romano, LT [1 ]
Northrup, JE [1 ]
Wood, RM [1 ]
Teepe, M [1 ]
Johnson, NM [1 ]
机构
[1] Xerox Corp, Palo Alto Res Ctr, Palo Alto, CA 94304 USA
关键词
D O I
10.1063/1.124448
中图分类号
O59 [应用物理学];
学科分类号
摘要
Room-temperature continuous-wave (cw) operation is demonstrated with InGaN multiple-quantum-well laser diodes containing an asymmetric waveguide structure. Pulsed threshold current densities as low as 5.2 kA/cm(2) have been obtained for ridge-waveguide laser diodes grown on sapphire substrates by metal-organic chemical vapor deposition. For improved thermal management, the sapphire substrate was thinned and the devices were mounted p side up onto a copper heatsink. Under cw conditions at 20 degrees C, threshold current densities were 8.3 kA/cm(2) with threshold voltages of 6.3 V. The emission wavelength was 401 nm with output powers greater than 3 mW per facet. Under cw conditions, laser oscillation was observed up to 25 degrees C. The room-temperature cw operation lifetimes, for a constant current, exceeded one hour. (C) 1999 American Institute of Physics. [S0003-6951(99)03430-0].
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页码:581 / 583
页数:3
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