Multi Fano Resonance-based Plasmonic MIM Nanosensor for Label-Free Virus Detection

Abstract

Plasmonics-based sensors have grown more popular in the biosensing sector because of their label-free detection feature, which not only makes the sensor easier to use but also eliminates the need for numerous antibodies, which is a requirement for enzyme-linked immunosorbent assays. In this paper, a plasmonic-based refractive index sensor is proposed consisting of a linear rectangular waveguide coupled with a semi-ring arc and a microring resonator on both sides separated by a coupling distance. The Finite Difference Time Domain method is used to study the transmittance characteristics of the sensor. The transmittance curve displays Quintuple Fano resonances, which show sensitivity of 1000, 1184, 1290, 1914, and 2372.1 nm/RIU at 1.037, 1.211, 1.323, 2.051, and 2.383 μm, respectively. Further investigation is carried out by varying structural and geometrical parameters, such as the microring resonator’s radius and the coupling distance between the semi-ring arc and the microring resonator, which may arise due to fabrication intricacies. The performance of the sensor is investigated using the Figure of Merit, Q factor, and Detection limit producing a value of 30.41 RIU−1, 30.2, and 0.0328, respectively. The proposed sensor is further examined for its potential use in the detection of HSV, influenza A, HIV, and M13 Bacteriophage viruses.

Keywords:

• FDTD
• Metal-insulator-metal
• Plasmonic waveguide
• Quintuple Fano resonance
• Sensitivity

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Gaurav K. Yadav

Gaurav K Yadav received the BTech degree in electronics and communication engineering from the National Institute of Technology Arunachal Pradesh in 2015, and the MTech degree from the National Institute of Technology Arunachal Pradesh in 2017, where he is currently pursuing the PhD degree. His research interests include all-optical systems and plasmonics sensors. Corresponding author. Email: [email protected]

Sanjeev K. Metya

Sanjeev K Metya received the BTech degree in electronics and communication engineering from the Haldia Institute of Technology, Haldia, in 2005, the MTech degree in electronics and communication engineering from the Kalinga Institute of Industrial Technology - Deemed University, Bhubaneswar, in 2007, and the PhD degree from the malaviya national Institute of Technology Jaipur, in 2014. He is currently an assistant professor at the Department of Electronics and Communication Engineering, National Institute of Technology Arunachal Pradesh. His current research interests include all-optical systems, plasmonics, photonic crystals, nonlinear optoelectronics, reversible optical computing, and numerical modelling. He has published and reported over 42 research papers/review articles in peerreviewed International journals/conferences. He is a senior member of IEEE and a member of OPTICA and SPIE. He is also a life member of OSI. Email: [email protected]