Short Wavelength Injection Lasers

9361646 Lei 提议将开发一种能够发射从蓝色到紫外光谱范围内的相干辐射的注入激光器。 宽带隙半导体将具有不对称势垒，该势垒将允许少数载流子注入，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激光器，该设备可以配备法布里-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通过短波长的发射来获得有效的少数载流子注入。 然后设计最终结构并计算性能极限；可获得的波长范围、预期效率、功率处理能力和远场方向图。 ***

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. ***