Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151670
Title: Phase-change-material-based low-loss visible-frequency hyperbolic metamaterials for ultrasensitive label-free biosensing
Authors: Sreekanth, Kandammathe Valiyaveedu
Ouyang, Qingling
Sreejith, Sivaramapanicker
Zeng, Shuwen
Wu, Lishu
Ilker, Efe
Dong, Weiling
Mohamed ElKabbash
Yu, Ting
Lim, Chwee Teck
Hinczewski, Michael
Strangi, Giuseppe
Yong, Ken-Tye
Simpson, Robert E.
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2019
Source: Sreekanth, K. V., Ouyang, Q., Sreejith, S., Zeng, S., Wu, L., Ilker, E., Dong, W., Mohamed ElKabbash, Yu, T., Lim, C. T., Hinczewski, M., Strangi, G., Yong, K., Simpson, R. E. & Singh, R. (2019). Phase-change-material-based low-loss visible-frequency hyperbolic metamaterials for ultrasensitive label-free biosensing. Advanced Optical Materials, 7(12), 1900081-. https://dx.doi.org/10.1002/adom.201900081
Project: MOE2015-T2-2-103
Journal: Advanced Optical Materials
Abstract: Hyperbolic metamaterials (HMMs) have emerged as a burgeoning field of research over the past few years as their dispersion can be easily engineered in different spectral regions using various material combinations. Even though HMMs have comparatively low optical loss due to a single resonance, the noble-metal-based HMMs are limited by their strong energy dissipation in metallic layers at visible frequencies. Here, the fabrication of noble-metal-free reconfigurable HMMs for visible photonic applications is experimentally demonstrated. The low-loss and active HMMs are realized by combining titanium nitride (TiN) and stibnite (Sb₂S₃) as the phase change material. A reconfigurable plasmonic biosensor platform based on active Sb₂S₃–TiN HMMs is proposed, and it is shown that significant improvement in sensitivity is possible for small molecule detection at low concentrations. In addition, a plasmonic apta-biosensor based on a hybrid platform of graphene and Sb₂S₃–TiN HMM is developed and the detection and real-time binding of thrombin concentration as low as 1 × 10⁻¹⁵ m are demonstrated. A biosensor operating in the visible range has several advantages including the availability of sources and detectors in this region, and ease of operation particularly for point-of-care applications.
URI: https://hdl.handle.net/10356/151670
ISSN: 2195-1071
DOI: 10.1002/adom.201900081
DOI (Related Dataset): 10.21979/N9/JPRKXS
Rights: This is the peer reviewed version of the following article: Sreekanth, K. V., Ouyang, Q., Sreejith, S., Zeng, S., Wu, L., Ilker, E., Dong, W., Mohamed ElKabbash, Yu, T., Lim, C. T., Hinczewski, M., Strangi, G., Yong, K., Simpson, R. E. & Singh, R. (2019). Phase-change-material-based low-loss visible-frequency hyperbolic metamaterials for ultrasensitive label-free biosensing. Advanced Optical Materials, 7(12), 1900081-, which has been published in final form at https://doi.org/10.1002/adom.201900081. 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
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