A method for reducing surface electric field of graded-index reflective coating
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College of Opto—Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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Corresponding author:
JIANG Hou-man, jhm3395@sina.com
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Received Date:
2011-08-31
Accepted Date:
2011-09-27
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Abstract
Considering graded-index reflective coating with high surface electric field and low surface damage threshold,a compensation process of reflection-induced retardance is applied for reducing the surface electric field of graded-index reflective coating.To achieve this compensation,without generating another interface,a uniform thin layer should be added on the surface of graded-index reflectance coating.This method obviously reduces the surface electric field.But it makes the central wavelength of reflective coating appreciably drift.However,comparing to reflectance bandwidth,this drift is so little that it can be ignored.This study will play an important role in designing graded-index reflectance coating with high damage threshold.
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