Terahertz emission from vertically aligned InN nanorod arrays
Abstract
Terahertz emission from indium nitride (InN) nanorods and InN film grown by molecular-beam epitaxy on Si(111) substrates has been investigated. Terahertz emission from InN nanorods is at least three times more intense than that from InN film and depends strongly on the size distribution of the nanorods. Surface electron accumulation at the InN nanorods effectively screens out the photo-Dember field in the accumulation layer formed under the surface. The nanorods with considerably large diameter than the thickness of accumulation layer are found to be dominant in the emission of terahertz radiation from InN nanorod arrays.
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The photo-Dember effect arising from unequal electron-hole diffusion rates is a common source of charge currents in nanowires, often in addition to or in competition with junction fields, depending on doping type.
“The photo-Dember effect arising from unequal electron-hole diffusion rates is a common source of charge currents in nanowires31,222–224, often in addition to or in competition with junction fields221,222, depending on doping type.”
From Ultrafast terahertz emission from emerging symmetry-broken materials (2023) · cites this paper as [222]
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- Authors
- Ahn, H., Ku, Y.-P., Wang, Y.-C., Chuang, C.-H., Gwo, S., & Pan, C.-L.
- Affiliations
- National Yang Ming Chiao Tung University (TW)
- National Tsing Hua University (TW)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2007-09-24
- Volume
- 91
- Issue
- 13
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2026148495
- Cited by
- 57
- References
- 12
- Citations by year
- 2024: 1 · 2023: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2017: 3 · 2016: 4 · 2015: 8 · 2014: 3 · 2013: 5 · 2012: 6
- FWCI
- 4.41
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › GaN-based semiconductor devices and materials
- Physical Sciences › Engineering › Biomedical Engineering › Nanowire Synthesis and Applications
- Keywords
- terahertz emission, indium nitride, nanorod arrays, vertically aligned nanorods, Si(111) substrate, photo-Dember effect, surface electron accumulation, InN thin films, molecular beam epitaxy
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