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Title: Hybrid lead halide perovskites for ultrasensitive photoactive switching in terahertz metamaterial devices
Authors: Manjappa, Manukumara
Srivastava, Yogesh Kumar
Solanki, Ankur
Kumar, Abhishek
Sum, Tze Chien
Singh, Ranjan
Keywords: Science::Physics::Optics and light
Engineering::Materials::Functional materials
Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2017
Source: Manjappa, M., Srivastava, Y. K., Solanki, K., Kumar, A., Sum, T. C., & Singh, R. (2017). Hybrid lead halide perovskites for ultrasensitive photoactive switching in terahertz metamaterial devices. Advanced materials, 29(32), 1605881-. doi:10.1002/adma.201605881
Project: M4081282
Journal: Advanced materials
Abstract: The recent meteoric rise in the field of photovoltaics with the discovery of highly efficient solar-cell devices is inspired by solution-processed organic-inorganic lead halide perovskites that exhibit unprecedented light-to-electricity conversion efficiencies. The stunning performance of perovskites is attributed to their strong photoresponsive properties that are thoroughly utilized in designing excellent perovskite solar cells, light-emitting diodes, infrared lasers, and ultrafast photodetectors. However, optoelectronic application of halide perovskites in realizing highly efficient subwavelength photonic devices has remained a challenge. Here, the remarkable photoconductivity of organic-inorganic lead halide perovskites is exploited to demonstrate a hybrid perovskite-metamaterial device that shows extremely low power photoswitching of the metamaterial resonances in the terahertz part of the electromagnetic spectrum. Furthermore, a signature of a coupled phonon-metamaterial resonance is observed at higher pump powers, where the Fano resonance amplitude is extremely weak. In addition, a low threshold, dynamic control of the highly confined electric field intensity is also observed in the system, which could tremendously benefit the new generation of subwavelength photonic devices as active sensors, low threshold optically controlled lasers, and active nonlinear devices with enhanced functionalities in the infrared, optical, and the terahertz parts of the electromagnetic spectrum.
ISSN: 0935-9648
DOI: 10.1002/adma.201605881
DOI (Related Dataset):
Schools: School of Physical and Mathematical Sciences 
Organisations: Centre for Disruptive Photonic Technologies
The Photonics Institute
Rights: © 2017 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

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