Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan
博士 === 國立清華大學 === 電子工程研究所 === 92 === In this dissertation, two topics are discussed. The first part is concerning the rotational anisotropy SHG studies of the group-III nitride compound films on Si(111) substrates. The symmetry behavior of AlN/Si(111) and GaN/AlN/Si(111) structures grown by molecula...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | en_US |
Published: |
2004
|
Online Access: | http://ndltd.ncl.edu.tw/handle/63223613475193151919 |
id |
ndltd-TW-092NTHU5428041 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-092NTHU54280412015-10-13T13:08:03Z http://ndltd.ncl.edu.tw/handle/63223613475193151919 Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan 由表面徑向角不對稱分佈探討三五族氮化物、銀薄膜及銀奈米微顆粒鍍於矽(111)表面內留存應力對二次諧波之影響 Chau Shiu Chen 陳照勗 博士 國立清華大學 電子工程研究所 92 In this dissertation, two topics are discussed. The first part is concerning the rotational anisotropy SHG studies of the group-III nitride compound films on Si(111) substrates. The symmetry behavior of AlN/Si(111) and GaN/AlN/Si(111) structures grown by molecular beam epitaxy (MBE) have been analyzed by measuring the rotational dependence of the polarized second harmonic generation intensity for different polarized fundamental beams. The crystalline structure has also been checked by reflection high-energy electron diffraction (RHEED), X-ray diffraction and photoluminescence (PL) spectroscopy. Considering various contributions of the nonlinear response from the bulk and interfaces, the interface strain implies an nonuniform inhomogeneous intensity variation of second harmonic generation as functions of the surface azimuthal rotation angle ψ.Therefore, the observation of nonlinear optical effect provides a valuable illustration of the epitaxy quality and growth parameter characterization by a nondestructive method. The second part is about the rotational anisotropy SHG studies of Ag thin films and nanoparticles on Si(111) substrates. The asymmetric distributions of the surface optical second harmonic generation (SHG) through azimuthally angular scans for thin silver films deposited on Si(111) wafers have been detected with different polarizations of output beams. On account of the inversion symmetry of silicon crystals, the SHG for the Ag/Si system is mainly contributed from silver film and silicon surface. In this work, we found that the interface strain implies an asymmetric intensity variation of SHG with respect to the surface azimuthal angle as an ultra thin Ag film is deposited on silicon wafers. This asymmetric behavior is prominent as the deposited silver layer is heated to change from a continuous film to granular nanoparticles. Similar change of the surface asymmetric SHG is observed for a bare Si wafer imposed with an external force or adsorbed with a drop of epoxy glue. Juh-Tzeng Lue 呂助增 2004 學位論文 ; thesis 95 en_US |
collection |
NDLTD |
language |
en_US |
format |
Others
|
sources |
NDLTD |
description |
博士 === 國立清華大學 === 電子工程研究所 === 92 === In this dissertation, two topics are discussed. The first part is concerning the rotational anisotropy SHG studies of the group-III nitride compound films on Si(111) substrates. The symmetry behavior of AlN/Si(111) and GaN/AlN/Si(111) structures grown by molecular beam epitaxy (MBE) have been analyzed by measuring the rotational dependence of the polarized second harmonic generation intensity for different polarized fundamental beams. The crystalline structure has also been checked by reflection high-energy electron diffraction (RHEED), X-ray diffraction and photoluminescence (PL) spectroscopy. Considering various contributions of the nonlinear response from the bulk and interfaces, the interface strain implies an nonuniform inhomogeneous intensity variation of second harmonic generation as functions of the surface azimuthal rotation angle ψ.Therefore, the observation of nonlinear optical effect provides a valuable illustration of the epitaxy quality and growth parameter characterization by a nondestructive method.
The second part is about the rotational anisotropy SHG studies of Ag thin films and nanoparticles on Si(111) substrates. The asymmetric distributions of the surface optical second harmonic generation (SHG) through azimuthally angular scans for thin silver films deposited on Si(111) wafers have been detected with different polarizations of output beams. On account of the inversion symmetry of silicon crystals, the SHG for the Ag/Si system is mainly contributed from silver film and silicon surface. In this work, we found that the interface strain implies an asymmetric intensity variation of SHG with respect to the surface azimuthal angle as an ultra thin Ag film is deposited on silicon wafers. This asymmetric behavior is prominent as the deposited silver layer is heated to change from a continuous film to granular nanoparticles. Similar change of the surface asymmetric SHG is observed for a bare Si wafer imposed with an external force or adsorbed with a drop of epoxy glue.
|
author2 |
Juh-Tzeng Lue |
author_facet |
Juh-Tzeng Lue Chau Shiu Chen 陳照勗 |
author |
Chau Shiu Chen 陳照勗 |
spellingShingle |
Chau Shiu Chen 陳照勗 Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
author_sort |
Chau Shiu Chen |
title |
Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
title_short |
Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
title_full |
Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
title_fullStr |
Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
title_full_unstemmed |
Strain Induced Asymmetric Nonlinear Optical Distribution of Group-III Nitrides, Ag Films and Ag Nanoparticles on Si(111) by the Study of Surface Angular Azimuthal Scan |
title_sort |
strain induced asymmetric nonlinear optical distribution of group-iii nitrides, ag films and ag nanoparticles on si(111) by the study of surface angular azimuthal scan |
publishDate |
2004 |
url |
http://ndltd.ncl.edu.tw/handle/63223613475193151919 |
work_keys_str_mv |
AT chaushiuchen straininducedasymmetricnonlinearopticaldistributionofgroupiiinitridesagfilmsandagnanoparticlesonsi111bythestudyofsurfaceangularazimuthalscan AT chénzhàoxù straininducedasymmetricnonlinearopticaldistributionofgroupiiinitridesagfilmsandagnanoparticlesonsi111bythestudyofsurfaceangularazimuthalscan AT chaushiuchen yóubiǎomiànjìngxiàngjiǎobùduìchēngfēnbùtàntǎosānwǔzúdànhuàwùyínbáomójíyínnàimǐwēikēlìdùyúxì111biǎomiànnèiliúcúnyīnglìduìèrcìxiébōzhīyǐngxiǎng AT chénzhàoxù yóubiǎomiànjìngxiàngjiǎobùduìchēngfēnbùtàntǎosānwǔzúdànhuàwùyínbáomójíyínnàimǐwēikēlìdùyúxì111biǎomiànnèiliúcúnyīnglìduìèrcìxiébōzhīyǐngxiǎng |
_version_ |
1717732155464876032 |