Asymmetry of light absorption upon propagation of focused femtosecond laser pulses with spatiotemporal coupling through glass materials

2017 ◽  
Author(s):  
Vladimir P. Zhukov ◽  
Nadezhda M. Bulgakova
Keyword(s):  
Femtosecond Laser ◽  
Light Absorption ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Infrared Light Absorption and Emissivity of Silicon Microstructured by Femtosecond Laser in SF6

2011 ◽  
Vol 287-290 ◽  
pp. 364-368 ◽  
Author(s):  
Yuan Li ◽  
Guo Jin Feng ◽  
Li Zhao
Keyword(s):  
Femtosecond Laser ◽  
Wavelength Range ◽  
Light Absorption ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Infrared Light ◽  
Structure Defects ◽  
Wide Wavelength Range ◽  
Different Temperatures ◽  
Tentative Explanation

The surface microstructured silicon prepared by femtosecond laser pulses irradiation in SF6shows significantly enhanced light absorption over a wide wavelength range. Absorptance of microstructured silicon is measured from 2 to 16μm, and the absorptance can up to 0.8 in the measured wavelength range. The absorptance of microstructured silicon increases as the height of spikes increases. Emissivity of microstructured silicon at different temperatures(100°C-400°C) is measured from 2.5μm to 25μm. Greatly enhanced emissivity compared to that of flat silicon was observed. At a certain temperature, with increasing the height of the spikes, the emissivity increases. For a sample with 13–14μm high spikes, the emissivity at a temperature of 100°C is approximately 0.96. A tentative explanation for the high absorptance of microstructured silicon has been carried out from three aspects: impurity states, structure defects and multiple reflection of light between spikes. The excellent properties of microstructured silicon make it a promising candidate for applications of infrared detectors, silicon solar cells, flat blackbody source and so on.

scholarly journals 3-D aluminum nanostructure with microhole array synthesized by femtosecond laser radiation for enhanced light extinction

2021 ◽  
Author(s):  
Abdul Salam Mahmood ◽  
Krishnan Venkatakrishnan ◽  
Bo Tan
Keyword(s):  
Femtosecond Laser ◽  
Light Absorption ◽  
Target Surface ◽  
Laser Pulses ◽  
Pulse Frequency ◽  
Femtosecond Laser Pulses ◽  
Light Extinction ◽  
Ambient Conditions ◽  
Aluminum Target ◽  
Microhole Array

This article presents 3-D aluminum micro-nanostructures for enhanced light absorption. Periodic microhole arrays were created by firing a train of femtosecond laser pulses at megahertz pulse frequency onto the surface of an aluminum target at ambient conditions. The laser trains ablated the target surface and created microholes leading to the generation of deposited nanostructures inside and around the microholes. These micro-nanostructures showed enhanced light absorption, which is attributed to surface plasmonics induced by the generation of both nano- and microstructures. These micro-nanostructures may be promising for solar cell applications.

scholarly journals 3-D aluminum nanostructure with microhole array synthesized by femtosecond laser radiation for enhanced light extinction

2021 ◽  
Author(s):  
Abdul Salam Mahmood ◽  
Krishnan Venkatakrishnan ◽  
Bo Tan
Keyword(s):  
Femtosecond Laser ◽  
Light Absorption ◽  
Target Surface ◽  
Laser Pulses ◽  
Pulse Frequency ◽  
Femtosecond Laser Pulses ◽  
Light Extinction ◽  
Ambient Conditions ◽  
Aluminum Target ◽  
Microhole Array

This article presents 3-D aluminum micro-nanostructures for enhanced light absorption. Periodic microhole arrays were created by firing a train of femtosecond laser pulses at megahertz pulse frequency onto the surface of an aluminum target at ambient conditions. The laser trains ablated the target surface and created microholes leading to the generation of deposited nanostructures inside and around the microholes. These micro-nanostructures showed enhanced light absorption, which is attributed to surface plasmonics induced by the generation of both nano- and microstructures. These micro-nanostructures may be promising for solar cell applications.

Transient light absorption induced in glassby femtosecond laser pulses

2009 ◽  
Vol 39 (10) ◽  
pp. 933-937
Author(s):  
I V Blonskii ◽  
V N Kadan ◽  
O I Shpotyuk ◽  
I A Pavlov ◽  
N N Kryuchkov
Keyword(s):  
Femtosecond Laser ◽  
Light Absorption ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Great enhancement of infrared light absorption of silicon surface-structured by femtosecond laser pulses in N2 ambient

2006 ◽  
Vol 60 (17-18) ◽  
pp. 2187-2189 ◽  
Author(s):  
Jingtao Zhu ◽  
Li Zhao ◽  
Wen Li ◽  
Yu Wang ◽  
Guojin Feng ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Light Absorption ◽  
Silicon Surface ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Infrared Light

Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Houbertz ◽  
J. Schulz ◽  
L. Fröhlich ◽  
G. Domann ◽  
M. Popall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Sol Gel ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hybrid Polymer ◽  
Organic Hybrid ◽  
Two Photon ◽  
Applied Technology ◽  
Scale Structures ◽  
Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

Ablation of metals with femtosecond laser pulses

2001 ◽  
Author(s):  
K. H. Leong ◽  
T. Y. Plew ◽  
R. L. Maynard ◽  
A. A. Said ◽  
L. A. Walker
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses
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