Publications (1)3.84 Total impact
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Article: High-performance quantum cascade lasers with wide electroluminescence ( ~600 cm－1), operating in continuous-wave above 100 °C
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ABSTRACT: The authors report high temperature continuous-wave �cw� operations of broad-gain quantum cascade lasers based on the anticrossed dual-upper-state to multiple-lower-state design. The devices exhibit extremely wide electroluminescence ��600 cm−1� and subthreshold amplified spontaneous emission ��570 cm−1� spectra at room temperature. Despite showing such broad electroluminescence spectra, the high-reflection coated, buried heterostructure lasers operating at 6.8 u�m demonstrate a low threshold current density of �1.5 kA/cm2 and a high power of �500 mW with a high slope efficiency of �1.6 W/A in cw mode at 300 K. The maximum cw operating temperature of above 100 °C is achieved.Applied Physics Letters 06/2011; 98(23):231102. · 3.84 Impact Factor
