Alignment of grain boundary in a Si film crystallized by a linearly polarized laser beam on a glass substrate

2001 ◽  
Vol 78 (15) ◽  
pp. 2250-2252 ◽  
Author(s):  
Susumu Horita ◽  
Y. Nakata ◽  
A. Shimoyama
Keyword(s):  
Grain Boundary ◽  
Laser Beam ◽  
Glass Substrate ◽  
Linearly Polarized

Small angle grain boundary Ge films on biaxial CaF2/glass substrate

2010 ◽  
Vol 312 (4) ◽  
pp. 607-610 ◽  
Author(s):  
C. Gaire ◽  
P.C. Clemmer ◽  
H.-F. Li ◽  
T.C. Parker ◽  
P. Snow ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Small Angle ◽  
Glass Substrate

Formation of periodic grain boundary in an Si thin film crystallized by a linearly polarized Nd:YAG pulse laser with an ultra sonic oscillator

2004 ◽  
Vol 808 ◽  
Author(s):  
Hirokazu Kaki ◽  
Takehiko Ootani ◽  
Susumu Horita
Keyword(s):  
Grain Boundary ◽  
Pulse Laser ◽  
Pulse Number ◽  
Novel Technique ◽  
Thermal Distribution ◽  
Irradiation Pulse ◽  
Linearly Polarized ◽  
Boundary Location ◽  
Amorphous Si ◽  
Si Thin Film

ABSTRACTIn order to obtain a large silicon (Si) grain and to control the location of its boundary in a Si film melting-crystallized by a pulse laser, we have proposed to use periodic thermal distribution spontaneously induced by irradiation of a linearly polarized laser beam. We estimated the suitable amorphous Si (a-Si) thickness taking account of multiple reflection theoretically and confirmed it experimentally. Also, we proposed a novel technique to reduce the irradiation pulse number to control the grain boundary location stably in the crystallized Si film, in which the elastic wave was generated on the surface of a-Si film prior to melting-crystallization by using an ultra sonic oscillator. Owing to this technique, we can control the grain boundary location periodically with only 1 pulse irradiation in the crystallized Si film.

Laser beam guiding in partially stripped magnetized quantum plasma

Laser Physics ◽  
2021 ◽  
Vol 32 (1) ◽  
pp. 016002
Author(s):  
Punit Kumar ◽  
Nisha Singh Rathore
Keyword(s):  
Laser Beam ◽  
Spot Size ◽  
Quantum Plasma ◽  
Beam Power ◽  
Linear Wave ◽  
Linear Wave Equation ◽  
Quantum Hydrodynamic Model ◽  
Bohm Potential ◽  
Expansion Technique ◽  
Linearly Polarized

Abstract Relativistic and ponderomotive nonlinearities arising by the passage of a linearly polarized laser beam through a partially stripped magnetized quantum plasma are analyzed. The interaction formalism has been developed using the recently developed quantum hydrodynamic model. The effects associated with the Fermi pressure, quantum Bohm potential and electron spin have been incorporated. A nonparaxial, non-linear wave equation has been obtained by the use of source dependent expansion technique and spot size has been evaluated. The nonlinear relativistic self-focusing tends to focus the beam while the ponderomotive nonlinearity tends to defocus. The effect of magnetization and quantum effects on the spot size and the beam power have been studied.

Generating Linearly Polarized TEM00Mode Laser Beam with Grating Mirror as the Back-Cavity Mirror

2014 ◽  
Vol 41 (3) ◽  
pp. 0302001
Author(s):  
方茗 Fang Ming ◽  
高健存 Gao Jiancun ◽  
唐新春 Tang Xinchun ◽  
唐淳 Tang Chun ◽  
裴正平 Pei Zhengping ◽  
...  
Keyword(s):  
Laser Beam ◽  
Linearly Polarized ◽  
Cavity Mirror

Determination of grain boundary barrier height and interface states by a focused laser beam

1983 ◽  
Vol 42 (3) ◽  
pp. 285-287 ◽  
Author(s):  
E. Poon ◽  
E. S. Yang ◽  
H. L. Evans ◽  
W. Hwang ◽  
R. M. Osgood
Keyword(s):  
Grain Boundary ◽  
Laser Beam ◽  
Barrier Height ◽  
Interface States ◽  
Grain Boundary Barrier

Measurement of Grain Boundary Parameters by Laser-Spot Photoconductivity

1982 ◽  
Vol 17 ◽  
Author(s):  
E. Poon ◽  
H.L. Evans ◽  
W. Hwang ◽  
R.M. Osgood ◽  
E.S. Yang
Keyword(s):  
Steady State ◽  
Electrical Properties ◽  
Grain Boundary ◽  
Laser Beam ◽  
Cross Section ◽  
Capture Cross Section ◽  
Capture Cross ◽  
Transient Signals ◽  
Trap Energy ◽  
Interface Charge

ABSTRACTAn experimental technique has been developed to study the electrical properties of semiconductor grain boundaries (GBs) by a focused laser beam. The laser beam is trained on a GB while the photoconductivity of the sample is measured. Both the steady-state and transient signals are recorded as functions of temperature. From these data, we obtain well-defined GB parameters, including the barrier height, interface charge density, trap energy and thermal capture cross-section. This technique allows us to examine localized regions of individual GBs in a semiconductor with multiple grains.

Influence of Magnetic Field on Level of Linearly Polarized Laser Beam Passing through Faraday Crystal

2021 ◽  
Vol 408 ◽  
pp. 129-140
Author(s):  
Samer H. Zyoud ◽  
Atef Abdelkader ◽  
Ahed H. Zyoud ◽  
Araa Mebdir Holi
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Laser Beam ◽  
Active Material ◽  
Polarized Light ◽  
Linearly Polarized ◽  
Physical Effects ◽  
Pass Through ◽  
Polarization Level ◽  
Optically Active Material

Many natural materials have the ability to rotate the polarization level of linearly polarized laser beam and pass through it. This phenomenon is called optical activity. In the event that a light beam (linearly polarized) passes through an optically active material, such as a quartz crystal, and projected vertically on the optical axis, the output beam will be polarized equatorially, and the vibration level will rotate at a certain angle [1], [2], [3]. A number of crystals, liquids, solutions, and vapors rotate the electric field of linearly polarized light that passes through them [4], [5], [6], [7]. Many different physical effects are applied to optical isotropic and transparent materials that cause them to behave as optical active materials, where they are able to rotate the polarization level of the polarized light linearly and pass through it [8], [9], [10]. These effects include mechanical strength, electric field, and magnetic field. By placing one of these effects on an optically transparent medium, it changes the behavior of the light travelling through it [11].

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