Please use this identifier to cite or link to this item:
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-.
Project: MOE2016-T3-1-006 
NRF2017-ANR002 2DPS 
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.
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 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

Files in This Item:
File Description SizeFormat 
Electrically tunable singular phase _Manuscript file.pdfAccepted manuscript992.14 kBAdobe PDFThumbnail
Electrically tunable singular phase_Supplementary file.pdfAccepted supplementary file884.31 kBAdobe PDFThumbnail

Citations 20

Updated on Feb 24, 2024

Web of ScienceTM
Citations 20

Updated on Oct 28, 2023

Page view(s)

Updated on Feb 27, 2024

Download(s) 50

Updated on Feb 27, 2024

Google ScholarTM




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