Supersymmetric nitride-based semiconductor lasers

超对称氮化物半导体激光器

• 批准号: 524962704
• 负责人: Professor Dr. Ulrich Theodor Schwarz
• 金额: --
• 依托单位: Instytut Fizyki
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/524962704?language=en
• 关键词: Supersymmetric; nitride; based; semiconductor; lasers

Fundamental lateral mode operation of edge-emitting lasers (EELs) can typically be achieved by using a sufficiently narrow or shallowly etched laser ridge. This in turn leads to small width of active area resulting in moderate emitted power. In addition, small width of active areas contributes to local generation of high thermal power density being problematic to dissipate. In this project we propose to adopt supersymmetry (SUSY) theory in a context of nitride-based lasers to boost their fundamental mode emission. SUSY enables widening the laser ridge and sustaining fundamental mode emission simultaneously, that will contribute to enhancement of optical power with high quality of the laser beam emitted by electrically driven devices. The project consists of three main objectives. First two are related to designing and realisation the SUSY-lasers operating under the pulse regime and at continuous-wave CW operation. Both aims require different designs of SUSY-lasers that will be investigated in the project. Third aim is related to experimental characterisation of the SUSY-lasers unveiling reach physics responsible for stable single mode operation. This new electrically driven laser configuration, that has never been studied experimentally nor theoretically, is a fascinating example of non-Hermitian physics that brings great promise for the enhancement of lasing properties not only of the configuration considered in the project, but also other in-plane lasers fabricated in all semiconductor material configurations including interband-cascade and quantum-cascade lasers, as well as vertical-cavity surface emitting lasers (VCSELs), fiber lasers etc. Therefore in this project we focus not only on improvement of nitride-based edge-emitting lasers properties but also on a thorough understanding of the fundamental physical phenomena occurring in SUSY-lasers concerning the role of the exceptional points and parity-time symmetry breaking, that are expected to play a key role in understanding the operational principles of SUSY-lasers.

边缘发射激光器（EEL）的基横模操作通常可以通过使用足够窄或浅蚀刻的激光器脊来实现。这又导致有源区的小宽度，从而导致中等的发射功率。此外，有源区的小宽度有助于高热功率密度的局部产生，这对于耗散是有问题的。在这个项目中，我们建议采用超对称性（SUSY）理论在氮化物基激光器的背景下，以提高其基模发射。超对称性使得能够同时加宽激光脊和维持基模发射，这将有助于提高光功率，同时由电驱动器件发射的激光束具有高质量。该项目包括三个主要目标。前两个是与设计和实现超对称激光器的脉冲制度下，并在连续波CW操作。这两个目标需要不同的超对称性激光器的设计，将在该项目中进行研究。第三个目标是与超对称激光器的实验特性有关，揭示了稳定单模操作的物理学。这种新的电驱动激光器配置从未在实验上或理论上进行过研究，是非厄米特物理学的一个迷人的例子，不仅为项目中考虑的配置，而且还为所有半导体材料配置中制造的其他面内激光器（包括带间级联和量子级联激光器）的激光特性的增强带来了巨大的希望，以及垂直腔面发射激光器（VCSEL），光纤激光器等。因此，在本项目中，我们不仅关注氮化物基边发射激光器性能的改善，而且还关注对超对称激光器中发生的基本物理现象的透彻理解，这些基本物理现象涉及例外点和宇称时间对称性破缺的作用，这有望在理解超对称激光器的工作原理方面发挥关键作用。