Electron-hole plasma induced band gap renormalization in ZnO microlaser cavities
We report electron-hole plasma (EHP) lasing in hexagonal ZnO microrods and thin nanobelts. Under the excitation of 325 nm line femtosecond pulsed laser, ultraviolet whispering-gallery mode (WGM) lasing was observed from hexagonal ZnO microrods. When EHP was formed at high excitation energy density, the center wavelength of the WGM lasing band presented a redshift from 387.5 nm to 397.5 nm, and the full width of half maximum (FWHM) of the WGM lasing band increased from 2.5 nm to 7 nm. Each lasing mode showed obvious blueshift and broadening. Such lasing characteristics were attributed to the band gap renormalization (BGR) due to the high carrier concentration at the EHP condition. In addition, EHP Fabry-Perot (F-P) mode lasing from thin ZnO nanobelt was also observed and discussed. According to the phenomenological BGR calculation with including the carrier density dependent screening effect, the values of the band gap of ZnO at different excitation energy densities were obtained, which agree well with the experimental results.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:22 |
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| Enthalten in: |
Optics express - 22(2014), 23 vom: 17. Nov., Seite 28831-7 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Dai, Jun [VerfasserIn] |
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| Links: |
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| Themen: |
Journal Article |
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| Anmerkungen: |
Date Completed 09.11.2015 Date Revised 23.10.2018 published: Print Citation Status MEDLINE |
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| doi: |
10.1364/OE.22.028831 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM243586655 |
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| 245 | 1 | 0 | |a Electron-hole plasma induced band gap renormalization in ZnO microlaser cavities |
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| 500 | |a Date Completed 09.11.2015 | ||
| 500 | |a Date Revised 23.10.2018 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a We report electron-hole plasma (EHP) lasing in hexagonal ZnO microrods and thin nanobelts. Under the excitation of 325 nm line femtosecond pulsed laser, ultraviolet whispering-gallery mode (WGM) lasing was observed from hexagonal ZnO microrods. When EHP was formed at high excitation energy density, the center wavelength of the WGM lasing band presented a redshift from 387.5 nm to 397.5 nm, and the full width of half maximum (FWHM) of the WGM lasing band increased from 2.5 nm to 7 nm. Each lasing mode showed obvious blueshift and broadening. Such lasing characteristics were attributed to the band gap renormalization (BGR) due to the high carrier concentration at the EHP condition. In addition, EHP Fabry-Perot (F-P) mode lasing from thin ZnO nanobelt was also observed and discussed. According to the phenomenological BGR calculation with including the carrier density dependent screening effect, the values of the band gap of ZnO at different excitation energy densities were obtained, which agree well with the experimental results | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Plasma Gases |2 NLM | |
| 650 | 7 | |a Zinc Oxide |2 NLM | |
| 650 | 7 | |a SOI2LOH54Z |2 NLM | |
| 700 | 1 | |a Xu, Chunxiang |e verfasserin |4 aut | |
| 700 | 1 | |a Nakamura, Toshihiro |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Yueyue |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Jitao |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Yi |e verfasserin |4 aut | |
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