Please use this identifier to cite or link to this item:
Title: Chalcogenide phase change material for active terahertz photonics
Authors: Pitchappa, Prakash
Kumar, Abhishek
Prakash, Saurav
Jani, Hariom
Venkatesan, Thirumalai
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2019
Source: Pitchappa, P., Kumar, A., Prakash, S., Jani, H., Venkatesan, T., & Singh, R. (2019). Chalcogenide phase change material for active terahertz photonics. Advanced Materials, 31(12), 1808157-. doi:10.1002/adma.201808157
Project: NRF2016- ANR004 (M4197003)
Journal: Advanced Materials
Abstract: The strikingly contrasting optical properties of various phases of chalcogenide phase change materials (PCM) has recently led to the development of novel photonic devices such as all‐optical non‐von Neumann memory, nanopixel displays, color rendering, and reconfigurable nanoplasmonics. However, the exploration of chalcogenide photonics is currently limited to optical and infrared frequencies. Here, a phase change material integrated terahertz metamaterial for multilevel nonvolatile resonance switching with spatial and temporal selectivity is demonstrated. By controlling the crystalline proportion of the PCM film, multilevel, non‐volatile, terahertz resonance switching states with long retention time at zero hold power are realized. Spatially selective reconfiguration at sub‐metamaterial scale is shown by delivering electrical stimulus locally through designer interconnect architecture. The PCM metamaterial also features ultrafast optical modulation of terahertz resonances with tunable switching speed based on the crystalline order of the PCM film. The multilevel nonvolatile, spatially selective, and temporally tunable PCM metamaterial will provide a pathway toward development of novel and disruptive terahertz technologies including spatio‐temporal terahertz modulators for high speed wireless communication, neuromorphic photonics, and machine‐learning metamaterials.
ISSN: 0935-9648
DOI: 10.1002/adma.201808157
DOI (Related Dataset): 10.21979/N9/FANBBO
Schools: School of Physical and Mathematical Sciences 
Organisations: Centre for Disruptive Photonic Technologies
The Photonics Institute
Rights: © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
ADMA_Supplementary_PP_Final.pdf2.06 MBAdobe PDFThumbnail
ADMA_THz GST MM_PP_Final.pdf1.52 MBAdobe PDFThumbnail

Citations 5

Updated on Feb 22, 2024

Web of ScienceTM
Citations 5

Updated on Oct 24, 2023

Page view(s)

Updated on Feb 24, 2024

Download(s) 5

Updated on Feb 24, 2024

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.