Underwater annealing and texturing for enhancing electrical characteristics of n-aSi/p-cSi using Nd 3 + : YAG laser beam-overlap technique with a wavelength of 532 nm

2016 ◽  
Vol 6 (1) ◽  
pp. 014001 ◽  
Author(s):  
Y. Esther Blesso Vidhya ◽  
Nilesh J. Vasa
Keyword(s):  
Laser Beam ◽  
Electrical Characteristics ◽  
Yag Laser ◽  
532 Nm

A Study of the Photoelectric Effect Caused by a Laser Beam Used in a Beam Bounce Technique in a C-AFM System

2008 ◽  
Author(s):  
Hung-Sung Lin ◽  
Mong-Sheng Wu
Keyword(s):  
Laser Beam ◽  
Failure Analysis ◽  
Atomic Force Microscope ◽  
Photoelectric Effect ◽  
Scanning Probe ◽  
Nanometer Scale ◽  
Electrical Characteristics ◽  
Atomic Force ◽  
Probe Microscope ◽  
Probe Head

Abstract The use of a scanning probe microscope (SPM), such as a conductive atomic force microscope (C-AFM) has been widely reported as a method of failure analysis in nanometer scale science and technology [1-6]. A beam bounce technique is usually used to enable the probe head to measure extremely small movements of the cantilever as it is moved across the surface of the sample. However, the laser beam used for a beam bounce also gives rise to the photoelectric effect while we are measuring the electrical characteristics of a device, such as a pn junction. In this paper, the photocurrent for a device caused by photon illumination was quantitatively evaluated. In addition, this paper also presents an example of an application of the C-AFM as a tool for the failure analysis of trap defects by taking advantage of the photoelectric effect.

Bactericidal properties of a defocused Nd-YAG-laser beam

1996 ◽  
Vol 121 (6) ◽  
pp. 590-592
Author(s):  
F. V. Semenov ◽  
P. A. Galenko-Yaroshevskii ◽  
S. A. Babichev
Keyword(s):  
Laser Beam ◽  
Yag Laser ◽  
Bactericidal Properties

Nd: YAG Laser Beam Welding of 6013 Aluminium Alloy Sheet Using Different Filler Powders

2002 ◽  
Vol 396-402 ◽  
pp. 1691-1696 ◽  
Author(s):  
Reinhold Braun ◽  
Günther Roth ◽  
Johannes Arnold
Keyword(s):  
Laser Beam ◽  
Aluminium Alloy ◽  
Laser Beam Welding ◽  
Alloy Sheet ◽  
Yag Laser

scholarly journals Study the effect of Iraqi weather parameter in FSO communication using different wavelength (650, 532) nm

2018 ◽  
Vol 16 (36) ◽  
pp. 104-112
Author(s):  
Abdullah A. Abdullah
Keyword(s):  
Laser Beam ◽  
Free Space ◽  
Beam Divergence ◽  
Atmospheric Conditions ◽  
Transmitted Power ◽  
Weather Factors ◽  
Long Distance ◽  
Great Idea ◽  
High Bandwidth ◽  
532 Nm

Light has already becomes a popular means of communication, and the high-bandwidth data into free space without the use of wires. A great idea took us to design a new system for transmitting sound through free space at (650, 532) nm wavelengths using reflective mirrors under different atmospheric conditions. The study showed us the effect of various weather factors (temperature, wind speed and humidity) on these wavelengths for different distances. As well as studying the attenuation caused by long-distance laser and beam divergence, A reflective dish was used to focus the spot of the laser beam on the photocell. Results were discussed under the effect of these factors and the attenuation resulting from the beam divergence. Thus, the system performance can be improved for range and the quantity transfer data by increasing transmitted power and reducing the divergence of the laser beam.

ANNEALING OF Te-IMPLANTED GaAs LAYERS USING A Nd-YAG LASER BEAM OF LARGE DIMENSION

1980 ◽  
pp. 360-366 ◽  
Author(s):  
G.M. Martin ◽  
M. Steers ◽  
C. Venger ◽  
F. Simondet ◽  
S. Rigo
Keyword(s):  
Laser Beam ◽  
Large Dimension ◽  
Yag Laser

LASER TATTOO REMOVAL COMPARISON BETWEEN 1064 AND 532 NM OF A Q-SWITCHEd Nd:YAG LASER TREATMENT

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Nada Abusalah Almabrouk Imrigha ◽  
Lau Pik Suan ◽  
Shumaila Islam ◽  
Ganesan Krishnan ◽  
Noriah Bidin
Keyword(s):  
Skin Biopsy ◽  
Laser Treatment ◽  
Laser Fluence ◽  
Pulse Energy ◽  
Single Pulse ◽  
Skin Damage ◽  
Laser Method ◽  
Yag Laser ◽  
Tattoo Removal ◽  
532 Nm

Invention of the Q-switch advanced laser method is the most effective methods of tattoo removal compared to other methods of i.e. chemical, mechanical and surgical. In this study, we are reporting black pigment tattoo removal by comparing two wavelengths 532 nm and 1064 nm of Q-switched Nd-YAG laser. Using a single-pulse laser at 1064 nm wavelength, the maximum laser fluence for skin damage is 3.04 J/cm2 with pulse energy 0.55 J. While, at 532 nm wavelength, maximum laser fluence is 0.5 J/cm2 with pulse energy 0.42 J at 8-10 ns for tattooed skins. Moreover, after 1064 nm and 532 nm laser irradiations, skin biopsy of black tattooed rat’s skin demonstrates the ink granules local redistribution. Microscopic study indicates that black ink particles become smaller and vanished from the skins after 1064 nm laser treatment. The findings of this study indicate that 1064 nm wavelengths of Q-switched Nd-YAG laser treatment with 0.55 J pulse energy, is one of the significant methods of black tattoo removal with remarkable differences.

scholarly journals Effect of Liquid Transparency on Laser-Induced Motion of Drops

2009 ◽  
Vol 131 (8) ◽  
Author(s):  
R. Shukla ◽  
K. A. Sallam
Keyword(s):  
Laser Beam ◽  
Rhodamine 6G ◽  
Marangoni Effect ◽  
Video Camera ◽  
Solid Substrate ◽  
Liquid Drops ◽  
Induced Motion ◽  
532 Nm ◽  
Rhodamine 6G Dye

An experimental investigation of the role of liquid transparency in controlling laser-induced motion of liquid drops is carried out. The study was motivated by application to manipulation of liquid drops over a solid substrate. Droplets with diameters of 1–4 mm were propelled on a hydrophobic substrate using a pulsed-laser beam (532 nm, 10 Hz, 3–12 mJ/pulse) with a 0.9 mm diameter fired parallel to the substrate. The test liquid was distilled water whose transparency was varied by adding different concentrations of Rhodamine 6G dye. Motion of the drops was observed using a video camera. Measurements include direction of motion and the distance traveled before the drops come to rest. The present results show that the direction of the motion depends on the drop transparency; opaque drops moved away from the laser beam, whereas transparent drops moved at small angles toward the laser beam. The motion of both transparent and opaque drops was dominated by thermal Marangoni effect; the motion of opaque drops was due to direct heating by the laser beam, whereas in the case of transparent drops, the laser beam was focused near the rear face of the transparent drops to form a spark that pushed the drops in the opposite direction. Energies lower than 3 mJ were incapable of moving the drops, and energies higher than 12 mJ shattered the drops instead of moving them. A phenomenological model was developed for the drop motion to explain the physics behind the phenomenon.

Photoinduced transformations in a thin-film waveguide AgCl-Ag composition under a green (532 nm) laser beam

2013 ◽  
Vol 115 (6) ◽  
pp. 843-847
Author(s):  
L. A. Ageev ◽  
V. K. Miloslavskii ◽  
V. I. Lymar ◽  
V. M. Reznikova
Keyword(s):  
Thin Film ◽  
Laser Beam ◽  
532 Nm
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