Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/143317
Title: Frequency-agile temporal terahertz metamaterials
Authors: Pitchappa, Prakash
Kumar, Abhishek
Liang, Haidong
Prakash, Saurav
Wang, Nan
Bettiol, Andrew A.
Venkatesan, Thirumalai
Lee, Chengkuo
Singh, Ranjan
Keywords: Physics and Applied Physics
Issue Date: 2020
Source: Pitchappa, P., Kumar, A., Liang, H., Prakash, S., Wang, N., Bettiol, A. A., ... Singh, Ranjan. (2020). Frequency-agile temporal terahertz metamaterials. Advanced Optical Materials, 8(12), 2000101-. doi:10.1002/adom.202000101
Project: NRF2016- ANR004 (M4197003)
NRF-CRP15-2015-01
A18A5b0056
Journal: Advanced Optical Materials
Abstract: Spatiotemporal manipulation of electromagnetic waves has recently enabled a plethora of exotic optical functionalities, such as non-reciprocity, dynamic wavefront control, unidirectional transmission, linear frequency conversion, and electromagnetic Doppler cloak. Here, an additional dimension is introduced for advanced manipulation of terahertz waves in the space-time, and frequency domains through integration of spatially reconfigurable microelectromechanical systems and photoresponsive material into metamaterials. A large and continuous frequency agility is achieved through movable microcantilevers. The ultrafast resonance modulation occurs upon photoexcitation of ion-irradiated silicon substrate that hosts the microcantilever metamaterial. The fabricated metamaterial switches in 400 ps and provides large spectral tunability of 250 GHz with 100% resonance modulation at each frequency. The integration of perfectly complementing technologies of microelectromechanical systems, femtosecond optical control and ion-irradiated silicon provides unprecedented concurrent control over space, time, and frequency response of metamaterial for designing frequency-agile spatiotemporal modulators, active beamforming, and low-power frequency converters for the next generation terahertz wireless communications.
URI: https://hdl.handle.net/10356/143317
ISSN: 21951071
DOI: 10.1002/adom.202000101
DOI (Related Dataset): 10.21979/N9/W62P3W
Rights: This is the accepted version of the following article: Pitchappa, P., Kumar, A., Liang, H., Prakash, S., Wang, N., Bettiol, A. A., ... Singh, Ranjan. Frequency-agile temporal terahertz metamaterials. Advanced Optical Materials, 8(12), 2000101-. doi:10.1002/adom.202000101, which has been published in final format at 10.1002/adom.202000101. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorsresources/Journal-Authors/licensing/self-archiving.html].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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