Special Section on Laser Damage III

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

[+] Author Affiliations
Hongping Ma, Xinbin Cheng, Jinlong Zhang, Bin Ma, Hongfei Jiao, Zhanshan Wang, Tongbao Li

Key Laboratory of Advanced Micro-Structure Materials, Ministry of Education, Shanghai 200092, China

Tongji University, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Shanghai 200092, China

Jin Yu, Zhijun Kang

Academy of Opto-Electronics Chinese Academy of Science, Beijing 100094, China

Yongjian Tang

Research Center of Laser Fusion, Mianyang, Sichuan 621900, China

Opt. Eng. 56(1), 011027 (Dec 08, 2016). doi:10.1117/1.OE.56.1.011027
History: Received May 29, 2016; Accepted November 15, 2016
Text Size: A A A

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.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Hongping Ma ; Xinbin Cheng ; Jinlong Zhang ; Bin Ma ; Hongfei Jiao, et al.
"Electric-field intensity enhancement of a series of artificial nodules in a broadband high-reflection coating", Opt. Eng. 56(1), 011027 (Dec 08, 2016). ; http://dx.doi.org/10.1117/1.OE.56.1.011027


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement


 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.