Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138569
Title: Excitons in 2D perovskites for ultrafast terahertz photonic devices
Authors: Kumar, Abhishek
Solanki, Ankur
Manjappa, Manukumara
Ramesh, Sankaran
Srivastava, Yogesh Kumar
Agarwal, Piyush
Sum, Tze Chien
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2020
Source: Kumar, A., Solanki, A., Manjappa, M., Ramesh, S., Srivastava, Y. K., Agarwal, P., . . . Singh, R. (2020). Excitons in 2D perovskites for ultrafast terahertz photonic devices. Science Advances, 6(8), eaax8821-. doi:10.1126/sciadv.aax8821
Project: MOE2016-T3-1-006
MOE2017-T2-1-110
MOE2016-T2-1-034
NRF-NRFI-2018-04
Journal: Science Advances
Abstract: In recent years, two-dimensional (2D) Ruddlesden-Popper perovskites have emerged as promising candidates for environmentally stable solar cells, highly efficient light-emitting diodes, and resistive memory devices. The remarkable existence of self-assembled quantum well (QW) structures in solution-processed 2D perovskites offers a diverse range of optoelectronic properties, which remain largely unexplored. Here, we experimentally observe ultrafast relaxation of free carriers in 20 ps due to the quantum confinement of free carriers in a self-assembled QW structures that form excitons. Furthermore, hybridizing the 2D perovskites with metamaterials on a rigid and a flexible substrate enables modulation of terahertz fields at 50-GHz modulating speed, which is the fastest for a solution-processed semiconductor-based photonic device. Hence, an exciton-based ultrafast response of 2D perovskites opens up large avenues for a wide range of scalable dynamic photonic devices with potential applications in flexible photonics, ultrafast wavefront control, and short-range wireless terahertz communications.
URI: https://hdl.handle.net/10356/138569
ISSN: 2375-2548
DOI: 10.1126/sciadv.aax8821
DOI (Related Dataset): https://doi.org/10.21979/N9/CQMJGP
Rights: © 2020 The Author(s), some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
eaax8821.full.pdf1.6 MBAdobe PDFView/Open

SCOPUSTM   
Citations 5

79
Updated on Jan 25, 2023

Web of ScienceTM
Citations 5

80
Updated on Jan 23, 2023

Page view(s)

230
Updated on Jan 29, 2023

Download(s) 50

51
Updated on Jan 29, 2023

Google ScholarTM

Check

Altmetric


Plumx

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