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|Title:||Frequency-agile temporal terahertz metamaterials||Authors:||Pitchappa, Prakash
Bettiol, Andrew A.
|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)
|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||Schools:||School of Physical and Mathematical Sciences||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|
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