Electric-field intensity enhancement of a series of artificial nodules in a broadband high-reflection coating

Hongping Ma; Xinbin Cheng; Jinlong Zhang; Bin Ma; Hongfei Jiao; Zhanshan Wang; Tongbao Li; Jin Yu; Zhijun Kang; Yongjian Tang

doi:10.1117/1.OE.56.1.011027

8 December 2016 Electric-field intensity enhancement of a series of artificial nodules in a broadband high-reflection coating

Hongping Ma, Xinbin Cheng, Jinlong Zhang, Bin Ma, Hongfei Jiao, Zhanshan Wang, Tongbao Li, Jin Yu, Zhijun Kang, Yongjian Tang

Author Affiliations +

Optical Engineering, Vol. 56, Issue 1, 011027 (December 2016). https://doi.org/10.1117/1.OE.56.1.011027

Abstract

A broadband high-reflection (HR) coating was used to suppress the electric-field intensity (EFI) enhancement in artificial nodules with five different sizes. However, the finitie-difference time-domain simulations reflected that the nodules initiating from 1.0-μmSiO₂ seeds showed abnormally stronger EFI enhancement, which is almost two times higher than the EFI enhancement of 1.0-μmSiO₂ seeds in a quarter-wave HR coating. This was also confirmed by the laser-induced damage threshold measurement. Our previous model combining light focusing and light penetrating effects was carefully examined to check whether the hotspots in a nodule initiating from the 1.0-μmSiO₂ seed were in the focal area or not. Although it was found that the focal length of the nodule decreased with reducing seed diameter, the hotspots in nodules initiating from a 1.0-μmSiO₂ seed were still much shallower than the focal area. In the broadband HR coating, the standing-wave EFI profiles at different working angles were given, which showed that the standing-wave EFI at the hotspots region was not negligible. Some complex interference or diffraction may cause the light to arrive at the hotspots region in phase and result in strong EFI enhancement. More work is necessary to gain a deeper understanding of this phenomenon.

Citation Download Citation

Hongping Ma, Xinbin Cheng, Jinlong Zhang, Bin Ma, Hongfei Jiao, Zhanshan Wang, Tongbao Li, Jin Yu, Zhijun Kang, and Yongjian Tang "Electric-field intensity enhancement of a series of artificial nodules in a broadband high-reflection coating," Optical Engineering 56(1), 011027 (8 December 2016). https://doi.org/10.1117/1.OE.56.1.011027

Published: 8 December 2016

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available