DataVXAdvanced Optical MaterialsPaper
journal article·2019-06

Phase‐Change‐Material‐Based Low‐Loss Visible‐Frequency Hyperbolic Metamaterials for Ultrasensitive Label‐Free Biosensing

Kandammathe Valiyaveedu Sreekanth, Qingling Ouyang, Sivaramapanicker Sreejith, Shuwen Zeng, Wu Lishu, Efe Ilker, Weiling Dong, Mohamed ElKabbash, Yu Ting, Chwee Teck Lim, Michael Hinczewski, Giuseppe Strangi, Ken‐Tye Yong, Robert E. Simpson, Ranjan Singh

Advanced Optical Materials· Volume 7· Issue 12
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Source abstract

Abstract

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.
Source: crossref · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Metamaterials and Metasurfaces Applications · Advanced Antenna and Metasurface Technologies · Polydiacetylene-based materials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Centre for Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University Singapore 637371 Singapore

School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore

CINTRA CNRS/NTU/THALES UMI 3288 Research Techno Plaza Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore

Biomedical Institute for Global Health Research and Technology National University of Singapore Singapore 117599 Singapore

Department of Physics Case Western Reserve University 10600 Euclid Avenue Cleveland OH 44106 USA

Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore

Department of Biomedical Engineering National University of Singapore Singapore 117583 Singapore

Department of Physics and CNR‐NANOTEC UOS of Cosenza Licryl Laboratory University of Calabria 87036 Rende Italy

Funding

Ministry of Education - Singapore

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