dc.citation.number |
8 |
- |
dc.citation.title |
APPLIED PHYSICS LETTERS |
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dc.citation.volume |
116 |
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dc.contributor.author |
Sarwar, Tuba |
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dc.contributor.author |
Cheekati, Srinivasa |
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dc.contributor.author |
Chung, Kunook |
- |
dc.contributor.author |
Ku, Pei-Cheng |
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dc.date.accessioned |
2023-12-21T18:06:29Z |
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dc.date.available |
2023-12-21T18:06:29Z |
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dc.date.created |
2022-02-07 |
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dc.date.issued |
2020-02 |
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dc.description.abstract |
A spectrometer concept based on wavelength-selective semiconductor photodiodes is proposed and demonstrated. The absorption properties of individual photodiodes were tuned via local strain engineering in nanostructured InGaN/GaN. By varying the diameters of individual nanopillars, the cutoff wavelengths of absorption were varied across the chip. The intrinsic wavelength selectivity is insensitive to the incident angle of light. The top-down fabrication process shown in this work is also compatible with scalable manufacturing. A proof-of-concept spectrometer was demonstrated based on 14 photodiodes, without any external optics or spectral filtering components, in the wavelength range of 450-590nm. Using a non-negative least squares algorithm enhanced by orthogonal matching pursuit, the spectrum of a test light source was reconstructed. |
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dc.identifier.bibliographicCitation |
APPLIED PHYSICS LETTERS, v.116, no.8 |
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dc.identifier.doi |
10.1063/1.5143114 |
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dc.identifier.issn |
0003-6951 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/57190 |
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dc.identifier.url |
https://aip.scitation.org/doi/10.1063/1.5143114 |
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dc.identifier.wosid |
000519606700003 |
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dc.language |
영어 |
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dc.publisher |
American Institute of Physics |
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dc.title |
On-chip optical spectrometer based on GaN wavelength-selective nanostructural absorbers |
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dc.type |
Article |
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dc.description.isOpenAccess |
FALSE |
- |
dc.type.docType |
Article |
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dc.description.journalRegisteredClass |
scie |
- |
dc.description.journalRegisteredClass |
scopus |
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