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Tao Tao
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i am just being curious about some details about how laser can induce charges inside a glass bulk? Does anyone else have more knowledge on this?
pedro111 said:laser generating charges? I did not know that.
Bobbywhy said:Tao Tao, Welcome to Physics Forums!
Here are two papers that describe "charges" inside glasses. Note, please, that these are not electrical charges, and that the glass is highly specialized.
"Three-dimensional direct femtosecond laser writing of second-order nonlinearities in glass
In this Letter, we propose another approach to create inside a silver-containing zinc phosphate glass a laser induced frozen charge gradient, similar to the thermal poling process, but localized with three-dimensionality.
The glass used for this study is a photosensitive zinc and gallium phosphate glass (40P2O5 −
55ZnO − 4Ga2O3 − 1Ag2O) containing 1% (mol.%) of silver oxide."
http://www.creol.ucf.edu/Research/Publications/5555.pdf
and
"LASER-INDUCED PHOTOCONDUCTIVITY IN SILICATE GLASSES BY MULTIPHOTON EXCITATION, A PRECURSOR OF DIELECTRIC BREAKDOWN AND MECHANICAL DAMAGE
A Q-switched ruby laser is used to induce photoconductivity in soda glass, fused quartz, and quartz crystal. The number of charge carriers produced per laser pulse of 1027 photons cm−2 s−1 is accounted for by multiphoton ionization of nonbridging oxygens in the silicon oxygen network."
http://www.nrcresearchpress.com/doi/abs/10.1139/p67-317?journalCode=cjp#.UhK5gL7D_Dc
Laser induced charge in glass refers to the process of creating a charge in a glass material using a laser. This is achieved by focusing a high-intensity laser beam onto the surface of the glass, causing localized heating and resulting in the generation of an electric field.
The laser beam, which is made up of photons, interacts with the electrons in the glass material and transfers energy to them. This causes the electrons to become excited and move to higher energy levels, creating a charge separation and resulting in an electric field.
Laser induced charge in glass has numerous applications in the fields of optics, electronics, and materials science. It is commonly used to fabricate microstructures, create optical waveguides, and manipulate the properties of glass materials for various purposes.
One major advantage of laser induced charge in glass is its ability to create highly precise and localized charges, making it useful for creating intricate patterns and structures. Additionally, it is a non-contact and non-invasive technique, making it suitable for use on delicate materials.
One limitation of laser induced charge in glass is the need for specialized equipment and expertise to perform the process. Additionally, the process can only be performed on certain types of glass materials, and the resulting charges may dissipate over time, requiring frequent recharging.