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Bjorn Manuel Hegelich
초강력 레이저과학 연구단
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Plasma emission characteristics in laser-induced breakdown spectroscopy of silicon with mid-infrared, multi-millijoule, nanosecond laser pulses from a Ho:YLF excitation source

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Title
Plasma emission characteristics in laser-induced breakdown spectroscopy of silicon with mid-infrared, multi-millijoule, nanosecond laser pulses from a Ho:YLF excitation source
Author(s)
ROTEM KUPFER; HERNAN J. QUEVEDO; HERBIE L. SMITH; THANH N. HA; ANDREW YANDOW; GANESH TIWARI; C. GRANT RICHMOND; LI FANG; B. MANUEL HEGELICH
Publication Date
2019-06
Journal
APPLIED OPTICS, v.58, no.17, pp.4592 - 4598
Publisher
OPTICAL SOC AMER
Abstract
We characterized the plasma emission produced by the interaction of multi-millijoule, 40 ns duration, mid-infrared laser pulses with a silicon surface. The laser pulses were produced by a Q-switched Ho:YLF master oscillator power amplifier system. Using spectral measurements and a framing camera, we observed a spatial separation of the plasma plume, increased emission signal with low white-light generation, and a drop in the time- and space-averaged apparent plasma density with increasing pump energy. Our results can be explained by continuous heating of the plasma by the pump pulse due to the more efficient inverse bremsstrahlung absorption at longer wavelengths. (C) 2019 Optical Society of America
URI
https://pr.ibs.re.kr/handle/8788114/6100
ISSN
0003-6935
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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