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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳永芳(Yang-Fang Chen) | |
| dc.contributor.author | Jiwei Chen | en |
| dc.contributor.author | 陳繼偉 | zh_TW |
| dc.date.accessioned | 2021-06-13T08:04:12Z | - |
| dc.date.available | 2005-07-26 | |
| dc.date.copyright | 2005-07-26 | |
| dc.date.issued | 2005 | |
| dc.date.submitted | 2005-07-21 | |
| dc.identifier.citation | Chapter 2
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/36526 | - |
| dc.description.abstract | In this thesis, we study InN epifilms using both conventional and cross-sectional Raman spectroscopy. Firstly, we found that the variation of the plasmon-longitudinal phonon coupling with carrier concentration agrees with what was previously reported.
In addition, we also found direct evidence for the existence of residual strain along the growth direction of the InN films. This result is very useful for the understanding of the depth dependence of the physical properties. We also showed that cross-sectional Raman spectroscopy can be used to study certain vibration modes that are normally not observable in the normal surface Raman configuration. On top of that, the A1(TO) mode was found to become increasingly prominent on approaching the interface between the InN and the GaN buffer layer, a fact we attributed to the high density of dislocations near the interface. Lastly, our study has shed more light on the mechanism for the formation of the A1(LO) mode in the Raman spectrum of InN. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T08:04:12Z (GMT). No. of bitstreams: 1 ntu-94-R92222062-1.pdf: 1160230 bytes, checksum: f82bf3ee695971475623a7d96cae4975 (MD5) Previous issue date: 2005 | en |
| dc.description.tableofcontents | I Abstract 7
1 Abstract 9 II Introduction and Theory 11 2 Introduction 13 Overviewof InN . . . . . . . . . . . . . . . . . . . . 13 Raman spectroscopy . . . . . . . . . . . . . . . . . . 14 Anti-Stokes shift&Stokes shift . . . . . . . . . 15 Conservation rules . . . . . . . . . . . . . . . . 16 Applications of Raman spectroscopy . . . . . . . . . 17 Raman intensity and geometry . . . . . . . . . . . . 18 Collection of the Raman spectra . . . . . . . . . . . . 18 Light source . . . . . . . . . . . . . . . . . . . . 19 Spectrometers . . . . . . . . . . . . . . . . . . . 19 Detector . . . . . . . . . . . . . . . . . . . . . . 20 Experimental setup . . . . . . . . . . . . . . . . . . . 20 Biography of Raman . . . . . . . . . . . . . . . . . . 21 3 Theory 29 Geometry and selection rules . . . . . . . . . . . . . 29 Selection rules . . . . . . . . . . . . . . . . . . . 29 Lattice vibrations of wurtzite InN . . . . . . . . . . . 29 Theoretical calculations . . . . . . . . . . . . . 29 Ramanmeasurements . . . . . . . . . . . . . . 30 Plasmon and LOphonon couplingmode . . . . . . . 33 Disorder activatedmode . . . . . . . . . . . . . . . . 34 Spatial correlationmodel . . . . . . . . . . . . . 34 Correlation length. . . . . . . . . . . . . . . . . 35 CONTENTS 3 III Data and Analysis 39 4 Normal Incidence Raman Spectroscopy of InN 41 InNsamples . . . . . . . . . . . . . . . . . . . . . . . 41 Plasmon longitudinal optical phonon coupling . . . . 43 Formation of the A1(LO) phonon structure in InN films 43 5 Cross-sectional Raman Spectroscopy of InN 51 Cross-sectional Raman spectra . . . . . . . . . . . . . 51 Determination of the spot size . . . . . . . . . . . . . 51 Relative intensities of the E2(High) and A1(LO) modes 53 Redshift of the E2(High)mode . . . . . . . . . . . . 60 Relaxation of strain by dislocations . . . . . . . 61 Thermal expansion . . . . . . . . . . . . . . . . 61 Residual thermal strain . . . . . . . . . . . . . . 64 Emergence of the forbidden B1 modes . . . . . . . . . 64 Estimate of the percentage residual thermal strain . . 66 Emergence of the forbidden A1(TO) mode towards the interface . . . . . . . . . . . . . . . . . . . . 67 Asymmetry of the A1(LO)mode . . . . . . . . . . . 67 IV Conclusion 73 6 Conclusion 75 V Acknowledgement 77 7 Acknowledgement 79 VI List of Publications 81 8 List of Publications 83 | |
| dc.language.iso | en | |
| dc.subject | 拉曼光譜 | zh_TW |
| dc.subject | 氮化銦 | zh_TW |
| dc.subject | InN | en |
| dc.subject | Raman | en |
| dc.title | 氮化銦之拉曼光譜分析 | zh_TW |
| dc.title | Studies on the Raman Spectra of InN Epifilms | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 93-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 沈志霖,林泰源(Tai-Yuan Lin) | |
| dc.subject.keyword | 氮化銦,拉曼光譜, | zh_TW |
| dc.subject.keyword | Raman,InN, | en |
| dc.relation.page | 83 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2005-07-21 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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