Short Wavelength Injection Lasers

[9361646]雷：我们将开发一种注入激光器，能够发射从蓝色到紫外线光谱范围内的相干辐射。宽带隙半导体将提供一个不对称屏障，允许注入少数载流子，同时阻止大多数载流子的提取，从而建立必要的人口反转。为了使该光发射器成为注入激光器，该装置可以提供一个法布里-珀罗腔或一个形成分布式反馈光栅的超晶格。一个简单的结构将证明，有效的少数载流子注入可以获得由此产生的短波长的发射。然后设计最终结构并计算性能极限；可获得的波长范围，预期的效率，功率处理能力和远场模式。＊＊＊

9361646 Lei The proposed will develop an injection laser capable of emitting coherent radiation in the spectral range from the blue to the ultraviolet. A wide bandgap semiconductor will be provided with an asymmetric barrier that will permit injection of minority carriers while blocking the extraction of majority carriers, thus establishing the necessary population inversion. To make this light emitter into an injection laser, the device can be provided with either a Fabry-perot cavity or a superlattice that forms a distributed feedback grating. A simple structure will be made to demonstrate that efficient minority carrier injection can be obtained with resultant emission of short wavelengths. Then the final structure will be designed and the limits of performance will be calculated; obtainable wavelength range, expected efficiency, power handling capability, and far-field pattern. ***