Ultrafast all-optical switching of germanium-based flexible metaphotonic devices
Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based...
| Päätekijät: | , , , , , , |
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| Muut tekijät: | |
| Aineistotyyppi: | Journal Article |
| Kieli: | English |
| Julkaistu: |
2019
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| Aiheet: | |
| Linkit: | https://hdl.handle.net/10356/88839 http://hdl.handle.net/10220/48335 |
| _version_ | 1826129419013455872 |
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| author | Lim, Wen Xiang Manjappa, Manukumara Srivastava, Yogesh Kumar Cong, Longqing Kumar, Abhishek MacDonald, Kevin F. Singh, Ranjan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Lim, Wen Xiang Manjappa, Manukumara Srivastava, Yogesh Kumar Cong, Longqing Kumar, Abhishek MacDonald, Kevin F. Singh, Ranjan |
| author_sort | Lim, Wen Xiang |
| collection | NTU |
| description | Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based flexible metaphotonic device for ultrafast optical switching of terahertz radiation is experimentally demonstrated. A resonant transmission modulation depth of 90% is achieved, with an ultrafast full recovery time of 17 ps. An observed sub‐picosecond decay constant of 670 fs is attributed to the presence of trap‐assisted recombination sites in the thermally evaporated germanium film. |
| first_indexed | 2024-10-01T07:40:17Z |
| format | Journal Article |
| id | ntu-10356/88839 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:40:17Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/888392023-02-28T19:36:32Z Ultrafast all-optical switching of germanium-based flexible metaphotonic devices Lim, Wen Xiang Manjappa, Manukumara Srivastava, Yogesh Kumar Cong, Longqing Kumar, Abhishek MacDonald, Kevin F. Singh, Ranjan School of Physical and Mathematical Sciences Ultrafast Photoswitching, Flexible Metamaterial Device DRNTU::Science::Physics Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based flexible metaphotonic device for ultrafast optical switching of terahertz radiation is experimentally demonstrated. A resonant transmission modulation depth of 90% is achieved, with an ultrafast full recovery time of 17 ps. An observed sub‐picosecond decay constant of 670 fs is attributed to the presence of trap‐assisted recombination sites in the thermally evaporated germanium film. MOE (Min. of Education, S’pore) Accepted version 2019-05-23T03:37:43Z 2019-12-06T17:12:00Z 2019-05-23T03:37:43Z 2019-12-06T17:12:00Z 2018 Journal Article Lim, W. X., Manjappa, M., Srivastava, Y. K., Cong, L., Kumar, A., MacDonald, K. F., & Singh, R. (2018). Ultrafast All-Optical Switching of Germanium-Based Flexible Metaphotonic Devices. Advanced Materials, 30(9), 1705331-. doi:10.1002/adma.201705331 0935-9648 https://hdl.handle.net/10356/88839 http://hdl.handle.net/10220/48335 10.1002/adma.201705331 en Advanced Materials © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Lim, W. X., Manjappa, M., Srivastava, Y. K., Cong, L., Kumar, A., MacDonald, K. F., & Singh, R. (2018). Ultrafast All-Optical Switching of Germanium-Based Flexible Metaphotonic Devices. Advanced Materials, 30(9), 1705331-., which has been published in final form at http://dx.doi.org/10.1002/adma.201705331. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. 33 p. application/pdf |
| spellingShingle | Ultrafast Photoswitching, Flexible Metamaterial Device DRNTU::Science::Physics Lim, Wen Xiang Manjappa, Manukumara Srivastava, Yogesh Kumar Cong, Longqing Kumar, Abhishek MacDonald, Kevin F. Singh, Ranjan Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title | Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title_full | Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title_fullStr | Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title_full_unstemmed | Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title_short | Ultrafast all-optical switching of germanium-based flexible metaphotonic devices |
| title_sort | ultrafast all optical switching of germanium based flexible metaphotonic devices |
| topic | Ultrafast Photoswitching, Flexible Metamaterial Device DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/88839 http://hdl.handle.net/10220/48335 |
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