Effect of optical breakdown on second harmonic generation from Si(111)7 × 7 with Nd: YAG laser

Ken Nakamura; Shingo Ichimura; Hazime Shimizu

doi:10.1143/JJAP.33.L1035

Effect of optical breakdown on second harmonic generation from Si(111)7 × 7 with Nd: YAG laser

Ken Nakamura, Shingo Ichimura, Hazime Shimizu

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

Effect of optical breakdown on second harmonic generation (SHG) from Si(111)7 × 7 was investigated. After the irradiation of a laser beam with a threshold energy for the optical breakdown, the intensity of second harmonics (SH) polarized along the [01(formula presented)] axis measured as a function of pump-polarization showed deviation from 90° periodicity which is expected from the surface C_3v symmetry, although low energy electron diffraction (LEED) still exhibited the 7×7 structure. The irradiation of a more intense laser beam led to structural disorder, resulting in complete disappearance of SH periodicity, and no pattern of LEED was exhibited.

Original language	English
Pages (from-to)	L1035-L1037
Journal	Japanese Journal of Applied Physics
Volume	33
Issue number	7
DOIs	https://doi.org/10.1143/JJAP.33.L1035
Publication status	Published - 1994 Jan 1
Externally published	Yes

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Keywords

Optical breakdown
Polarization
Second harmonic generation
SHG
Si(111)7 × 7

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Cite this

Nakamura, K., Ichimura, S., & Shimizu, H. (1994). Effect of optical breakdown on second harmonic generation from Si(111)7 × 7 with Nd: YAG laser. Japanese Journal of Applied Physics, 33(7), L1035-L1037. https://doi.org/10.1143/JJAP.33.L1035

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AB - Effect of optical breakdown on second harmonic generation (SHG) from Si(111)7 × 7 was investigated. After the irradiation of a laser beam with a threshold energy for the optical breakdown, the intensity of second harmonics (SH) polarized along the [01(formula presented)] axis measured as a function of pump-polarization showed deviation from 90° periodicity which is expected from the surface C3v symmetry, although low energy electron diffraction (LEED) still exhibited the 7×7 structure. The irradiation of a more intense laser beam led to structural disorder, resulting in complete disappearance of SH periodicity, and no pattern of LEED was exhibited.

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10.1143/JJAP.33.L1035