Effect of Electric Field Regulation on Laser Damage of Composite Low-Dispersion Mirrors
Source abstract
Abstract
Low dispersion mirrors are important because of their potential use in petawatt (PW) laser systems. The following two methods are known to increase the laser-induced damage threshold of low dispersion optical components: use of a wide-bandgap-material protective layer and control of electric field distribution. By controlling the electric field distribution of composite low-dispersion mirrors (CLDM), we shift the electric field peaks from the material interface into the wide-bandgap material. However, the damage threshold of modified-electric-field composite low dispersion mirror (E-CLDM) does not increase. Damage morphology shows that the initial damaged layer is Ta2O5. An immediate cause is the enhancement of the electric field in internal layers caused by surface electric field regulation. Theoretical calculations show that the damage threshold of CLDM or E-CLDM is determined by the competition results of bandgap and the electric field of layer materials. The CLDM with different materials or different protective layer periods can be optimally designed according to the electric field competition effect in the future.
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Research context
OpenAlex topics: Laser Material Processing Techniques · Solid State Laser Technologies · Optical Systems and Laser Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Material for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China
CAS Center for Excellence in Ultra-Intense Laser Science, Shanghai 201800, China
Hangzhou Institute for Advanced Study, Hangzhou 310024, China
Funding
National Natural Science Foundation of China · China-Italy Intergovernmental Cooperation Project under the National Key R&D program of China · NSAF Fund Jointly set up by the National Natural Science Foundation of China and the 279 Chinese Academy of Engineering Physics · the Youth Innovation Promotion Association, Chinese 280 Academy of Sciences (CAS) · the Strategic Priority Research Program of CAS
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