| Autor: |
Thirumalai Venkatesan, Mayank Mishra, Ranjan Singh, Abhishek Kumar, Nan Wang, Hariom Jani, Rajdeep Singh Rawat, Prakash Pitchappa, Rohit Medwal, Saurav Prakash |
| Přispěvatelé: |
School of Physical and Mathematical Sciences, National Institute of Education, Institute of Microelectronics, A*STAR, The Photonics Institute, Centre for Disruptive Photonic Technologies (CDPT) |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Popis: |
Phase change materials provide unique reconfigurable properties for photonic applications that mainly arise from their exotic characteristic to reversibly switch between the amorphous and crystalline nonvolatile phases. Optical pulse based reversible switching of nonvolatile phases is exploited in various nanophotonic devices. However, large area reversible switching is extremely challenging and has hindered its translation into a technologically significant terahertz spectral domain. Here, this limitation is circumvented by exploiting the semiconducting nature of germanium antimony telluride (GST) to achieve dynamic terahertz control at picosecond timescales. It is also shown that the ultrafast response can be actively altered by changing the crystallographic phase of GST. The ease of fabrication of phase change materials allows for the realization of a variable ultrafast terahertz modulator on a flexible platform. The rich properties of phase change materials combined with the diverse functionalities of metamaterials and all-optical ultrafast control enables an ideal platform for design of efficient terahertz communication devices, terahertz neuromorphic photonics, and smart sensor systems. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) The authors acknowledge research funding support from the Ministry of Education, Singapore (AcRF Tier 1, Grant RG191/17, MOE2017-T2-1-110, MOE2019-T2-1-058, and MOE2016-T3-1-006(S)), Advanced Manufacturing and Engineering (AME) Programmatic grant (A18A5b0056) from Agency for Science, Technology and Research (A*STAR) and NRF CRP on Oxide Electronics on silicon Beyond Moore (NRF-CRP15-2015-01). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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