Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers

The change of the phase of light under the evolution of a nanomaterial with time is a promising new research direction. A phenomenon directly related to the sudden phase change of light is the Goos-Hänchen (G-H) shift, which describes the lateral beam displacement of the reflected light from the int...

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Main Authors: Sreekanth, Kandammathe Valiyaveedu, Das, Chandreyee Manas, Medwal, Rohit, Mishra, Mayank, Ouyang, Qingling, Rawat, Rajdeep Singh, Yong, Ken-Tye, Singh, Ranjan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/153514
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spelling sg-ntu-dr.10356-1535142023-02-28T19:32:59Z Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers Sreekanth, Kandammathe Valiyaveedu Das, Chandreyee Manas Medwal, Rohit Mishra, Mayank Ouyang, Qingling Rawat, Rajdeep Singh Yong, Ken-Tye Singh, Ranjan School of Physical and Mathematical Sciences School of Electrical and Electronic Engineering Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute CNRS International NTU THALES Research Alliances Science::Physics Chalcogenide Phase-Change Materials Generalized Brewster Angle Goos–Hänchen Shift Microheaters Reconfigurable Optical Structures Thin-Film Optical Absorbers The change of the phase of light under the evolution of a nanomaterial with time is a promising new research direction. A phenomenon directly related to the sudden phase change of light is the Goos-Hänchen (G-H) shift, which describes the lateral beam displacement of the reflected light from the interface of two media when the angles of incidence are close to the total internal reflection angle or Brewster angle. Here, an innovative design of lithography-free nanophotonic cavities to realize electrically tunable G-H shifts at the singular phase of light in the visible wavelengths is reported. Reversible electrical tuning of phase and G-H shifts is experimentally demonstrated using a microheater integrated optical cavity consisting of a dielectric film on an absorbing substrate through a Joule heating mechanism. In particular, an enhanced G-H shift of 110 times of the operating wavelength at the Brewster angle of the thin-film cavity is reported. More importantly, electrically tunable G-H shifts are demonstrated by exploiting the significant tunable phase change that occurs at the Brewster angles, due to the small temperature-induced refractive index changes of the dielectric film. Realizing efficient electrically tunable G-H shifts with miniaturized heaters will extend the research scope of the G-H shift phenomenon and its applications. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) Accepted version K.V.S. and R.S. acknowledge the funding support from Singapore Ministry of Education (MOE) grant numbers AcRF MOE2016-T3-1-006 and MOE AcRF Tier 1 RG96/19 and Advanced Manufacturing and Engineering (AME) Programmatic grant (A18A5b0056) by Agency for Science, Technology and Research (A*STAR). R.M. and R.S.R. would like to acknowledge the Ministry of Education (MOE) through Tier 2 grants (2019-T2-1-058). In addition, C.M.D. and K.T.Y. acknowledge the funding support from Singapore National Research Foundation (NRF) and French National Research Agency (ANR), grant number (NRF2017-ANR002 2DPS). 2021-12-27T07:21:53Z 2021-12-27T07:21:53Z 2021 Journal Article Sreekanth, K. V., Das, C. M., Medwal, R., Mishra, M., Ouyang, Q., Rawat, R. S., Yong, K. & Singh, R. (2021). Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers. Advanced Materials, 33(15), 2006926-. https://dx.doi.org/10.1002/adma.202006926 0935-9648 https://hdl.handle.net/10356/153514 10.1002/adma.202006926 33690921 2-s2.0-85102345773 15 33 2006926 en MOE2016-T3-1-006 A18A5b0056 2019-T2-1-058 NRF2017-ANR002 2DPS RG96/19 Advanced Materials 10.21979/N9/V6NDY7 This is the peer reviewed version of the following article: "Sreekanth, K. V., Das, C. M., Medwal, R., Mishra, M., Ouyang, Q., Rawat, R. S., . . . Singh, R. (2021). Electrically Tunable Singular Phase and Goos–Hänchen Shifts in Phase-Change-Material-Based Thin-Film Coatings as Optical Absorbers. Advanced Materials, 33(15), 2006926-, which has been published in final form at https://doi.org/10.1002/adma.202006926. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Chalcogenide Phase-Change Materials
Generalized Brewster Angle
Goos–Hänchen Shift
Microheaters
Reconfigurable Optical Structures
Thin-Film Optical Absorbers
spellingShingle Science::Physics
Chalcogenide Phase-Change Materials
Generalized Brewster Angle
Goos–Hänchen Shift
Microheaters
Reconfigurable Optical Structures
Thin-Film Optical Absorbers
Sreekanth, Kandammathe Valiyaveedu
Das, Chandreyee Manas
Medwal, Rohit
Mishra, Mayank
Ouyang, Qingling
Rawat, Rajdeep Singh
Yong, Ken-Tye
Singh, Ranjan
Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
description The change of the phase of light under the evolution of a nanomaterial with time is a promising new research direction. A phenomenon directly related to the sudden phase change of light is the Goos-Hänchen (G-H) shift, which describes the lateral beam displacement of the reflected light from the interface of two media when the angles of incidence are close to the total internal reflection angle or Brewster angle. Here, an innovative design of lithography-free nanophotonic cavities to realize electrically tunable G-H shifts at the singular phase of light in the visible wavelengths is reported. Reversible electrical tuning of phase and G-H shifts is experimentally demonstrated using a microheater integrated optical cavity consisting of a dielectric film on an absorbing substrate through a Joule heating mechanism. In particular, an enhanced G-H shift of 110 times of the operating wavelength at the Brewster angle of the thin-film cavity is reported. More importantly, electrically tunable G-H shifts are demonstrated by exploiting the significant tunable phase change that occurs at the Brewster angles, due to the small temperature-induced refractive index changes of the dielectric film. Realizing efficient electrically tunable G-H shifts with miniaturized heaters will extend the research scope of the G-H shift phenomenon and its applications.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Sreekanth, Kandammathe Valiyaveedu
Das, Chandreyee Manas
Medwal, Rohit
Mishra, Mayank
Ouyang, Qingling
Rawat, Rajdeep Singh
Yong, Ken-Tye
Singh, Ranjan
format Article
author Sreekanth, Kandammathe Valiyaveedu
Das, Chandreyee Manas
Medwal, Rohit
Mishra, Mayank
Ouyang, Qingling
Rawat, Rajdeep Singh
Yong, Ken-Tye
Singh, Ranjan
author_sort Sreekanth, Kandammathe Valiyaveedu
title Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
title_short Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
title_full Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
title_fullStr Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
title_full_unstemmed Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
title_sort electrically tunable singular phase and goos–hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
publishDate 2021
url https://hdl.handle.net/10356/153514
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