Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/153514
Title: Electrically tunable singular phase and Goos–Hänchen shifts in phase-change-material-based thin-film coatings as optical absorbers
Authors: Sreekanth, Kandammathe Valiyaveedu
Das, Chandreyee Manas
Medwal, Rohit
Mishra, Mayank
Ouyang, Qingling
Rawat, Rajdeep Singh
Yong, Ken-Tye
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2021
Source: 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
Project: MOE2016-T3-1-006 
A18A5b0056 
2019-T2-1-058 
NRF2017-ANR002 2DPS 
RG96/19 
Journal: Advanced Materials 
Abstract: 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.
URI: https://hdl.handle.net/10356/153514
ISSN: 0935-9648
DOI: 10.1002/adma.202006926
DOI (Related Dataset): 10.21979/N9/V6NDY7
Schools: School of Physical and Mathematical Sciences 
School of Electrical and Electronic Engineering 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
The Photonics Institute 
CNRS International NTU THALES Research Alliances 
Rights: 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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