Transverse-mode control in VCSELs by electrically tunable liquid crystal mode filters
Source abstract
Abstract
A distinctive method is used to achieve transverse-mode control by building and integrating a tunable liquid crystal (LC) mode filter on top of traditional vertical-cavity surface-emitting lasers (VCSELs). An LC cell is fabricated by injecting a type of nematic LC material (E7) in an annular groove patterned by SiO2. By electrically tuning the refractive index of the LC, a spatially dependent reflectivity profile can be achieved and optimized, which directly influences the threshold modal gain of each transverse mode provided by oxide-confined VCSELs. The flexible and accurate control performance of the LC mode filter structure have been demonstrated by the simulation results and our analysis. This design is a completely novel method to realize VCSELs with an accurate and real-time controllable transverse-mode, and it will probably play a significant role in the future.
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Research context
OpenAlex topics: Semiconductor Lasers and Optical Devices · Photonic and Optical Devices · Liquid Crystal Research Advancements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Semiconductor Material Sciences, Institute of Semiconductors, Chinese Academy of Sciences 1 , Beijing 100083, China
College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences 2 , Beijing 100049, China
Key Laboratory of Opto-electronic Technology, Ministry of Education, Beijing University of Technology 3 , Beijing 100124, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Beijing
References (34)
Show source-provided references
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