Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88839
Title: Ultrafast all-optical switching of germanium-based flexible metaphotonic devices
Authors: Lim, Wen Xiang
Manjappa, Manukumara
Srivastava, Yogesh Kumar
Cong, Longqing
Kumar, Abhishek
MacDonald, Kevin F.
Singh, Ranjan
Keywords: Ultrafast Photoswitching,
Flexible Metamaterial Device
DRNTU::Science::Physics
Issue Date: 2018
Source: 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
Series/Report no.: Advanced Materials
Abstract: 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.
URI: https://hdl.handle.net/10356/88839
http://hdl.handle.net/10220/48335
ISSN: 0935-9648
DOI: http://dx.doi.org/10.1002/adma.201705331
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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