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Gallium

Microsoft Word - Coherent Whitepaper - Laser Processing of µLED

Microsoft Word - Coherent Whitepaper - Laser Processing of µLED

…metallic gallium according to the
following chemical reaction:
2GaN(s) 2Ga(l) + N2
(g) (1)
The affected zone is minimized and controlled by the fluence of the laser beam; typically at that
interface, around 10 nm of GaN is ablated and changes to liquid gallium and nitrogen…

Photonik Feb2014.pdf

Photonik Feb2014.pdf

…To this depth the applied laser
energy converts the gallium nitride into
metallic gallium, which becomes liquid at
about 30°C. The sapphire wafer is thus
easily removed from the adjacent layer of
metallic gallium which was formed during
the laser lift-off process. The…

Photonics Spectra - July 2017

Photonics Spectra - July 2017

…around somewhat, but larger shifts require completely different materials. For example, blue and green lasers are gallium nitride based while red ones are built using aluminum gallium indium phosphide, Neukum said. The infrared is also an area of interest to semiconductor laser makers, primarily…

Laser Focus World - September 2015

Laser Focus World - September 2015

…pitches down
to 4.4 µm, consist of several different
imaging mediums such as silicon CCD,
phosphor-coated silicon, CMOS, indium gallium arsenide (InGaAs), and pyroelectric. As product specialist John
FIGURE 2. An Ophir-Spiricon Pyrocam IV
thermal camera is set up with a…

LLO WavelengthAdvantage.pdf

LLO WavelengthAdvantage.pdf

…decompose the GaN into metallic gallium. Due to these requirements, the excimer laser, especially the KrF excimer laser operating at 248 nm, is the first choice for LLO. 248nm line sapphire wafer separation The figure below is a white light interferometry image of a gallium nitride (GaN) epi-wafer…

CaseStudy Univ Regensburg final  Oct2015.pdf

CaseStudy Univ Regensburg final Oct2015.pdf

…work
outlined here is the first use of these CEP-stabilized
THz pulses to study charge transport in a
semiconductor, in this case gallium selenide (GaSe).
(Previous research studies by other groups had
examined the effects of intense non-CEP stabilized
THz pulses on…

Photonics Spectra - September 2017

Photonics Spectra - September 2017

…A key component in the
cost is the use of thick silicon. In contrast,
thin-film solar cells such as those based on
copper indium gallium selenide (CIGS),
have much lower fabrication and material
costs, but unfortunately they exhibit efficiency of just a few percent. However,…

Laser Focus World - May 2015

Laser Focus World - May 2015

…excitation of proteins, as well as the use of UV-excitable
fluorescence probes.
FIGURE 3. An electrical-current map of a
copper indium gallium selenide (CIGS) thinfilm photovoltaic (PV) cell features a grid
line, damage spot, and surface variations.
The map was created by…

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