Work

Numerical and experimental analysis of optical response of sub-wavelength period structure in carbonaceous film for refractive index sensing

Year: 2014

Type: article

Abstract: The resonance structure coupling the light into the leaky guided modes, which are visible in the reflection spectra as sharp peaks (Wood's anomalies), is analyzed experimentally and numerically. The guided mode resonance structure of 428 nm period patterned in a carbonaceous film demonstrated sensitivity of 70 nm/RIU. The calculated mode diagram explained the nature and positions of the peaks registered experimentally. The reflection spectra, near/far field distributions and field penetration depth for the analyzed structure were simulated employing three numerical solvers. The set of weak Rayleigh's anomalies was indentified from the simulations and the experimental data.

Source: Optics Express

DOI: 10.1364/oe.22.027462

Authors: Tomas Tamulevičius, Ieva Gražulevičiūtė, Darius Urbonas, Martynas Gabalis, Raimondas Petruškevičius, Sigitas Tamulevičius

Institutions: Kaunas University of Technology, Center for Physical Sciences and Technology

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: European Cooperation in Science and Technology