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Strain modulation in crumpled Si nanomembranes: Light detection beyond the Si absorption limit

Title
Strain modulation in crumpled Si nanomembranes: Light detection beyond the Si absorption limit
Author(s)
Katiyar, Ajit K.Kim, Beom JinLee, GwanjinKim, YoungjaeKim, Justin S.Kim, Jin MyungNam, SungWooLee, JaeDongKim, HyunminAhn, Jong-Hyun
Issued Date
2024-01
Citation
Science Advances, v.10, no.2
Type
Article
Keywords
SOLAR-CELLSSILICON
ISSN
2375-2548
Abstract
Although Si is extensively used in micro-nano electronics, its inherent optical absorption cutoff at 1100-nm limits its photonic and optoelectronic applications in visible to partly near infrared (NIR) spectral range. Recently, strain engineering has emerged as a promising approach for extending device functionality via tuning the material properties, including change in optical bandgap. In this study, the reduction in bandgap with applied strain was used for extending the absorption limit of crystalline Si up to 1310 nm beyond its intrinsic bandgap, which was achieved by creating the crumpled structures in Si nanomembranes (NMs). The concept was used to develop a prototype NIR image sensor by organizing metal-semiconductor-metal-configured crumpled Si NM photosensing pixels in 6 × 6 array. The geometry-controlled, self-sustained strain induction in Si NMs provided an exclusive photon management with shortening of optical bandgap and enhanced photoresponse beyond the conventional Si absorption limit. © 2024 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.
URI
http://hdl.handle.net/20.500.11750/47979
DOI
10.1126/sciadv.adg7200
Publisher
American Association for the Advancement of Science
Related Researcher
  • 이재동 Lee, JaeDong
  • Research Interests Theoretical Condensed Matter Physics; Ultrafast Dynamics and Optics; Nonequilibrium Phenomena
Files in This Item:
001142234100001.pdf

001142234100001.pdf

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Appears in Collections:
Department of Physics and Chemistry Light and Matter Theory Laboratory 1. Journal Articles
Division of Biomedical Technology 1. Journal Articles

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