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

The Optical Properties of DLC Films Processed by Laser Radiation

2011 ◽  
Vol 337 ◽  
pp. 120-124
Author(s):  
Yin Feng Chen ◽  
Jun Qi Xu ◽  
Jun Hong Su ◽  
Ling Xia Han
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Laser Radiation ◽  
Extinction Coefficient ◽  
Laser Energy ◽  
Damage Threshold ◽  
Laser Damage Threshold ◽  
Laser Damage ◽  
The Real ◽  
Before And After

Diamond-like carbon (DLC) films have being widely applied in various domains owing to their excellent optical and mechanical properties, chemical inertness and bio-compatibility[1,2]. But it generally exhibits low a laser induced damage threshold (LIDT).As to infrared protective films, DLC films were asked to be a high laser damage threshold. So far, the real reason of laser damage is unclear. In order to understand the real reason of the laser damage, it is necessary to deeply research the relationship between optical properties and laser radiation. In this paper, optical properties post irraditing by various laser energy were inverstigated. Hydrogen-free amorphous carbon films were deposited by unbalanced magnetron sputtering with a graphite target on Si substrate in this paper. The DLC films were radiated with raster scans methods by a 1064nm and 8–10 ns laser in this work. The transmittance, refractive index, extinction coefficient and surface morphology of DLC before and after radiation were examined by fourier transform infrared spectrometer, ellipsometer and talysurf respectively. The influences were considered as function of laser energy density.The optical properties before and after laser radiation were compared. It is found that as laser fluences rise from 0 to 0.5 J/cm2, the transmittance peak reduce from 67.06% to 58.27%, the refractive index decrease from 1.88 to 1.67(λ=1200), the extinction coefficient increase from 0.07 to 0.32(λ=1200), and the surface roughness become 149.28nm in this procedλure. Especially, the reasons of change were expounded in this paper.

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
Sign in / Sign up

Export Citation Format

Share Document