Femtosecond Laser Micro-structuring Of Transparent Materials And Its Ophthalmologic Applications

ABSTRACTIn a-Si:H solar cells, light trapping has been sought as a method to enhance absorption and improve the efficiencies of these devices. Here we present results for surface texturing of 2μm thick a-Si:H films by 800 nm wavelength femtosecond laser. The texture led to a significant enhancement in optical absorption (80%) in visible through near IR (60%). The textured surface was examined by a scanning electron microscope (SEM) and atomic force microscope (AFM). The results indicated the formation of dense spikes with height of 65–75 nm. The samples were completely black after femtosecond laser treatment.

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Femtosecond laser micro-structuring of alumina ceramic

Applied Surface Science ◽

10.1016/j.apsusc.2005.03.005 ◽

2005 ◽

Vol 248 (1-4) ◽

pp. 213-217 ◽

Cited By ~ 70

Author(s):

W. Perrie ◽

A. Rushton ◽

M. Gill ◽

P. Fox ◽

W. O’Neill

Keyword(s):

Femtosecond Laser ◽

Alumina Ceramic ◽

Micro Structuring

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Surface Modification Induced by Femtosecond Laser Pulses in Lithium Niobate

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.142.134 ◽

2011 ◽

Vol 142 ◽

pp. 134-137

Author(s):

Hong Yun Chen ◽

Zhen Zhu Wan ◽

Yan Ling Han

Keyword(s):

Surface Modification ◽

Lithium Niobate ◽

Femtosecond Laser ◽

Laser Energy ◽

Laser Pulses ◽

Sample Surface ◽

Femtosecond Laser Pulses ◽

Two Dimensional ◽

Damage Depth ◽

Transparent Materials

The interaction between femtoseocnd laser and transparent materials has been studied intensively in recent years. When the femtosecond laser was focused onto the surface of the transparent materials, if the laser fluence applied to the sample exceeds the material’s fluence threshold, ablation occurs. In this paper, we study the surface ablation of lithium niobate by femtosecond laser. We produced a two-dimensional array of voids in the sample surface by varying the number of shots and laser energy, and analyze of the damage depth with the relation to the pulse energy and the number of the pulse. It has important reference on the microfabrication in such materials by femtosecond laser.

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Welding of Transparent Materials Using Femtosecond Laser Pulses

Japanese Journal of Applied Physics ◽

10.1143/jjap.44.l687 ◽

2005 ◽

Vol 44 (No. 22) ◽

pp. L687-L689 ◽

Cited By ~ 115

Author(s):

Takayuki Tamaki ◽

Wataru Watanabe ◽

Junji Nishii ◽

Kazuyoshi Itoh

Keyword(s):

Femtosecond Laser ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Transparent Materials

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Femtosecond Laser Machining of Silica and Transparent Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.525.128 ◽

2014 ◽

Vol 525 ◽

pp. 128-132 ◽

Cited By ~ 2

Author(s):

M. Yu. Babiy ◽

S. S. Golik ◽

A. V. Kolesnikov ◽

F. G. Bystrov

Keyword(s):

Femtosecond Laser ◽

Focal Spot ◽

Optical Breakdown ◽

Laser Induced Breakdown Spectroscopy ◽

Laser Machining ◽

Practical Applications ◽

Breakdown Spectroscopy ◽

Laser Induced Breakdown ◽

Laser Spark ◽

Transparent Materials

Recently, interest in the study of processes occurring in the optical breakdown on the surface of solid targets associated with the increasing number of practical applications of the laser spark, such as laser induced breakdown spectroscopy and micro-and nanomaterials processing. One of the most important tasks - to reduce the diameter of the focal spot, because the size of the modifications directly related to it. However, it is not the only problem faced by the transition to sub-micron range modifications.

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