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Title: Aperiodic bragg reflectors for tunable high-purity structural color based on phase change material
Authors: Jana, Sambhu
Sreekanth, Kandammathe Valiyaveedu
Abdelraouf, Omar A. M.
Lin, Ronghui
Liu, Hong
Teng, Jinghua
Singh, Ranjan
Keywords: Physics
Issue Date: 2024
Source: Jana, S., Sreekanth, K. V., Abdelraouf, O. A. M., Lin, R., Liu, H., Teng, J. & Singh, R. (2024). Aperiodic bragg reflectors for tunable high-purity structural color based on phase change material. Nano Letters, 24(13), 3922-3929.
Project: NRF- CRP26-2021-0004 
Journal: Nano Letters 
Abstract: Tunable thin-film coating-based reflective color displays have versatile applications including image sensors, camouflage devices, spatial light modulators, and intelligent windows. However, generating high-purity colors using such coatings have posed a challenge. Here, we reveal high-purity color generation using an ultralow-loss phase change material (Sb2S3)-based tunable aperiodic distributed Bragg reflector (A-DBR). By strategically adjusting the periodicity of the adjacent layers of A-DBRs, we realize a narrow photonic bandgap with high reflectivity to generate high-purity orange and yellow colors. In particular, we demonstrate an A-DBR with a large photonic bandgap tunability by changing the structural phase of Sb2S3 layers from amorphous to crystalline. Moreover, we experimentally tailor multistate tunable colors through external optical stimuli. Unlike conventional nano thin-film coatings, our proposed approach offers an irradiance-free, narrowband, and highly reflective color band, achieving exceptional color purity by effectively suppressing reflections in off-color bands.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.4c00052
DOI (Related Dataset): 10.21979/N9/OZWMZ6
Schools: School of Physical and Mathematical Sciences 
Departments: Physics
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
The Photonics Institute 
Rights: © 2024 American Chemical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at
Fulltext Permission: embargo_20250410
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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