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Volume 25 - ICOP & ICPET 2019
ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 717-720 |
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Goodarzi R, Razaghi D, Hajesmaeilbaigi F. Investigation of the chirp effect on the temperature rising due to the interaction of femtosecond laser pulses with silicon. ICOP & ICPET _ INPC _ ICOFS 2019; 25 :717-720
URL: http://opsi.ir/article-1-1704-en.html
URL: http://opsi.ir/article-1-1704-en.html
1- Photonics and Quantum Technologies Research School, Nuclear Science and Technologies Research Institute, Atomic Energy Organization of Iran
Abstract: (1877 Views)
Femtosecond laser pulses due to their wide frequency spectrum will be chirped when propagating into any environment and this phenomenon is unavoidable for femtosecond laser pulses. In this paper, the effect of laser chirping on the interaction is investigated. The temperature of the carriers increases by about twice while using a chirped pulse laser. Also, the number of free carriers for the chirped pulses has enhanced and the lattice temperature has increased about three times relative to the un-chirped pulse. Finally, it has been shown that using a chirped pulse laser can increase the absorption of laser energy and, consequently, increase the temperature of the silicon. Also, negatively chirped laser pulse, due to deeper penetration into the sample, leads to an increase in the number of hot carriers and sample temperature.
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