Short Wavelength Injection Lasers

9361646雷建议将开发一种注入激光器能够发射相干辐射的光谱范围从蓝色到紫外线。 宽带隙半导体将被提供有非对称势垒，其将允许少数载流子的注入，同时阻止多数载流子的提取，从而建立必要的粒子数反转。 为了使这种光发射器成为注入式激光器，该器件可以配备法布里-珀罗腔或形成分布式反馈光栅的超晶格。 将制作一个简单的结构来证明可以获得有效的少数载流子注入，并产生短波长的发射。 然后将设计最终的结构，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图案。 ***

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. ***