Bidirectional semiconductor laser

被引:53
作者
Gmachl, C [1 ]
Tredicucci, A [1 ]
Sivco, DL [1 ]
Hutchinson, AL [1 ]
Capasso, F [1 ]
Cho, AY [1 ]
机构
[1] AT&T Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
关键词
D O I
10.1126/science.286.5440.749
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A semiconductor laser capable of operating under both positive and negative bias voltage is reported. Its active region behaves functionally as two different laser materials, emitting different wavelengths. depending on the design, when biased with opposite polarities. This concept was used for the generation of two wavelengths (6.3 and 6.5 micrometers) in the midinfrared region of the spectrum from a single quantum cascade laser structure. The two wavelengths are excited independently of each other and separated in time. This may have considerable impact on various semiconductor laser applications including trace gas analysis in remote sensing applications with differential absorption spectroscopy.
引用
收藏
页码:749 / 752
页数:4
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