Impact of dispersion, free carriers, and two-photon absorption on the generation of intense terahertz pulses in ZnTe crystals

2011 ◽  
Vol 98 (19) ◽  
pp. 191103 ◽  
Author(s):  
S. Vidal ◽  
J. Degert ◽  
M. Tondusson ◽  
J. Oberlé ◽  
E. Freysz
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Free Carriers ◽  
Two Photon ◽  
Terahertz Pulses

Optimization of Optical Wavelength Conversion in SOI Waveguide

2011 ◽  
Vol 110-116 ◽  
pp. 4498-4504
Author(s):  
Ashiq Hussain ◽  
Xin Zhu Sang ◽  
Chong Xiu Yu ◽  
Abid Muneer ◽  
Abdul Latif ◽  
...  
Keyword(s):  
Wavelength Conversion ◽  
Noise Figure ◽  
Life Time ◽  
Silicon On Insulator ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Free Carriers ◽  
Optical Wavelength ◽  
Two Photon ◽  
Optical Wavelength Conversion

In this paper the wavelength conversion in a 1cm long silicon-on-insulator (SOI) waveguide has been investigated numerically. The wavelength conversion efficiency is optimized by analyzing free carriers absorption (FCA) loss generated by two-photon-absorption (TPA). The free carriers life time is focused while other factors influencing noise figure are also considered.

Nonlinear Laser Melting Of Indium Antimonide And Silicon

1983 ◽  
Vol 13 ◽  
Author(s):  
Michael P. Hasselbeck ◽  
H. S. Kwok
Keyword(s):  
Indium Antimonide ◽  
Laser Light ◽  
Free Carrier ◽  
Photon Absorption ◽  
Free Carrier Absorption ◽  
Two Photon Absorption ◽  
Free Carriers ◽  
Two Photon ◽  
Avalanche Ionization ◽  
Carrier Absorption

ABSTRACTPulsed 10.6μm TEA CO2 laser light has been used to melt the semiconductors silicon and InSb. Measurements indicate that generation of free carriers necessary for melting may take place by nonlinear processes such as two-photon absorption or intraband avalanche ionization. If the semiconductor is sufficiently doped, melting may also result from linear free carrier absorption. In all cases, it appears that the molten depth exceeds several μm, which is much greater than obtained with lasers of shorter wavelength.

Second order interference in two photon absorption

1996 ◽  
Vol 43 (9) ◽  
pp. 1765-1771 ◽  
Author(s):  
M. W. HAMILTON and D. S. ELLIOTT
Keyword(s):  
Second Order ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon
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