Effects of structural properties and electric field distribution on the laser-damage threshold of HfO2 thin films

2000 ◽  
Author(s):  
Maria L. Protopapa ◽  
Marco Alvisi ◽  
M. Di Giulio ◽  
Ferdinando De Tomasi ◽  
Maria R. Perrone ◽  
...  
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Structural Properties ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage

scholarly journals Reflective Meta-Films with Anti-Damage Property via Field Distribution Manipulation

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 640
Author(s):  
Haichao Yu ◽  
Feng Tang ◽  
Jun Chen ◽  
Zao Yi ◽  
Xin Ye ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Incident Angle ◽  
Single Layer ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Magnetic Dipoles ◽  
New Approach ◽  
Intense Light

The reflective optical multi-films with high damage thresholds are widely used in intense-light systems. Metasurfaces, which can manipulate light peculiarly, give a new approach to achieve highly reflective films by a single-layer configuration. In this study, reflective metasurfaces, composed of silicon nanoholes, are numerically investigated to achieve high damage thresholds. These nanoholes can confine the strongest electric field into the air zone, and, subsequently, the in-air electric field does not interact directly with silicon, attenuating the optothermal effect that causes damage. Firstly, the geometrical dependencies of silicon nanoholes’ reflectance and field distribution are investigated. Then, the excitation states of electric/magnetic dipoles in nanostructures are analyzed to explain the electromagnetic mechanism. Furthermore, the reflection dependences of the nanostructures on wavelength and incident angle are investigated. Finally, for a typical reflective meta-film, some optothermal simulations are conducted, in which a maximum laser density of 0.27 W/µm2 can be handled. The study provides an approach to improve the laser damage threshold of reflective nanofilms, which can be exploited in many intense-light applications.

Optical properties and laser damage threshold of HfO2–SiO2 mixed composite thin films

2014 ◽  
Vol 53 (5) ◽  
pp. 850 ◽  
Author(s):  
Shuvendu Jena ◽  
Raj Bahadur Tokas ◽  
Nitin M. Kamble ◽  
Sudhakar Thakur ◽  
Naba Kishore Sahoo
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
Composite Thin Films

Microstructure of thin films: correlation with laser damage threshold

2001 ◽  
Author(s):  
Jerzy Ciosek ◽  
Wojciech Paszkowicz ◽  
Piotr Pankowski ◽  
Jerzy B. Pelka ◽  
Lech T. Baczewski ◽  
...  
Keyword(s):  
Thin Films ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage
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