Ultrafast Graphene Light Emitters
Ultrafast electrically driven nanoscale light sources are critical components in nanophotonics. Compound semiconductor-based light sources for the nanophotonic platforms have been extensively investigated over the past decades. However, monolithic ultrafast light sources with a small footprint remai...
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| Format: | Article |
| Language: | English |
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American Chemical Society
2019
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| Online Access: | https://hdl.handle.net/1721.1/122921 |
| _version_ | 1826198047121473536 |
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| author | Kim, Young Duck Gao, Yuanda Shiue, Ren-Jye Wang, Lei Aslan, Ozgur Bae, Myung-Ho Kim, Hyungsik Seo, Dongjea Choi, Heon-Jin Kim, Suk Hyun Nemilentsau, Andrei Low, Tony Tan, Cheng Hock Efetov, Dmitri Taniguchi, Takashi Watanabe, Kenji Shepard, Kenneth L. Heinz, Tony F. Englund, Dirk R. Hone, James |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Kim, Young Duck Gao, Yuanda Shiue, Ren-Jye Wang, Lei Aslan, Ozgur Bae, Myung-Ho Kim, Hyungsik Seo, Dongjea Choi, Heon-Jin Kim, Suk Hyun Nemilentsau, Andrei Low, Tony Tan, Cheng Hock Efetov, Dmitri Taniguchi, Takashi Watanabe, Kenji Shepard, Kenneth L. Heinz, Tony F. Englund, Dirk R. Hone, James |
| author_sort | Kim, Young Duck |
| collection | MIT |
| description | Ultrafast electrically driven nanoscale light sources are critical components in nanophotonics. Compound semiconductor-based light sources for the nanophotonic platforms have been extensively investigated over the past decades. However, monolithic ultrafast light sources with a small footprint remain a challenge. Here, we demonstrate electrically driven ultrafast graphene light emitters that achieve light pulse generation with up to 10 GHz bandwidth across a broad spectral range from the visible to the near-infrared. The fast response results from ultrafast charge-carrier dynamics in graphene and weak electron-acoustic phonon-mediated coupling between the electronic and lattice degrees of freedom. We also find that encapsulating graphene with hexagonal boron nitride (hBN) layers strongly modifies the emission spectrum by changing the local optical density of states, thus providing up to 460% enhancement compared to the gray-body thermal radiation for a broad peak centered at 720 nm. Furthermore, the hBN encapsulation layers permit stable and bright visible thermal radiation with electronic temperatures up to 2000 K under ambient conditions as well as efficient ultrafast electronic cooling via near-field coupling to hybrid polaritonic modes under electrical excitation. These high-speed graphene light emitters provide a promising path for on-chip light sources for optical communications and other optoelectronic applications. Keywords: graphene; ultrafast light emitter; thermal radiation; van der Waals heterostructure; optoelectronics |
| first_indexed | 2024-09-23T10:58:01Z |
| format | Article |
| id | mit-1721.1/122921 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:58:01Z |
| publishDate | 2019 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | mit-1721.1/1229212022-09-27T16:15:13Z Ultrafast Graphene Light Emitters Kim, Young Duck Gao, Yuanda Shiue, Ren-Jye Wang, Lei Aslan, Ozgur Bae, Myung-Ho Kim, Hyungsik Seo, Dongjea Choi, Heon-Jin Kim, Suk Hyun Nemilentsau, Andrei Low, Tony Tan, Cheng Hock Efetov, Dmitri Taniguchi, Takashi Watanabe, Kenji Shepard, Kenneth L. Heinz, Tony F. Englund, Dirk R. Hone, James Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Mechanical Engineering General Materials Science Bioengineering General Chemistry Condensed Matter Physics Ultrafast electrically driven nanoscale light sources are critical components in nanophotonics. Compound semiconductor-based light sources for the nanophotonic platforms have been extensively investigated over the past decades. However, monolithic ultrafast light sources with a small footprint remain a challenge. Here, we demonstrate electrically driven ultrafast graphene light emitters that achieve light pulse generation with up to 10 GHz bandwidth across a broad spectral range from the visible to the near-infrared. The fast response results from ultrafast charge-carrier dynamics in graphene and weak electron-acoustic phonon-mediated coupling between the electronic and lattice degrees of freedom. We also find that encapsulating graphene with hexagonal boron nitride (hBN) layers strongly modifies the emission spectrum by changing the local optical density of states, thus providing up to 460% enhancement compared to the gray-body thermal radiation for a broad peak centered at 720 nm. Furthermore, the hBN encapsulation layers permit stable and bright visible thermal radiation with electronic temperatures up to 2000 K under ambient conditions as well as efficient ultrafast electronic cooling via near-field coupling to hybrid polaritonic modes under electrical excitation. These high-speed graphene light emitters provide a promising path for on-chip light sources for optical communications and other optoelectronic applications. Keywords: graphene; ultrafast light emitter; thermal radiation; van der Waals heterostructure; optoelectronics United States. Department of Energy. Office of Basic Energy Sciences (award DE-SC0001088) 2019-11-12T19:54:46Z 2019-11-12T19:54:46Z 2018-01-22 2017-10 2019-06-14T15:40:26Z Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 https://hdl.handle.net/1721.1/122921 Young Duck Kim et al. "Ultrafast Graphene Light Emitters." Nano Letters 18, 2 (January 2018): 934-940 © 2018 American Chemical Society en https://doi.org/10.1021/acs.nanolett.7b04324 Nano Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society arXiv |
| spellingShingle | Mechanical Engineering General Materials Science Bioengineering General Chemistry Condensed Matter Physics Kim, Young Duck Gao, Yuanda Shiue, Ren-Jye Wang, Lei Aslan, Ozgur Bae, Myung-Ho Kim, Hyungsik Seo, Dongjea Choi, Heon-Jin Kim, Suk Hyun Nemilentsau, Andrei Low, Tony Tan, Cheng Hock Efetov, Dmitri Taniguchi, Takashi Watanabe, Kenji Shepard, Kenneth L. Heinz, Tony F. Englund, Dirk R. Hone, James Ultrafast Graphene Light Emitters |
| title | Ultrafast Graphene Light Emitters |
| title_full | Ultrafast Graphene Light Emitters |
| title_fullStr | Ultrafast Graphene Light Emitters |
| title_full_unstemmed | Ultrafast Graphene Light Emitters |
| title_short | Ultrafast Graphene Light Emitters |
| title_sort | ultrafast graphene light emitters |
| topic | Mechanical Engineering General Materials Science Bioengineering General Chemistry Condensed Matter Physics |
| url | https://hdl.handle.net/1721.1/122921 |
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