Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

Sensitivity enhancement through overlapping simultaneously excited Fano resonance modes of metallic-photonic-crystal sensors

Jian Zhang, Xinping Zhang, Xueqiong Su, Yi Lu, Shengfei Feng, and Li Wang

Open Access Open Access

Abstract

We investigated enhancement of sensitivity of sensors based on metallic photonic crystals through tuning the thickness of the waveguide layer by pulsed laser deposition. Thicker waveguides made of InGaZnO allow double resonance of Fano coupling modes due to plasmonic-photonic interactions. Tuning the angle of incidence enables overlap between these doubly resonant modes, which induces much enlarged and spectrally narrowed sensor signals, leading to significantly enhanced sensitivity of the sensor device. The thickness of the waveguide layer is found to be a crucial structural parameter to improve sensitivity of the MPC sensors.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Wide tunability of magnetoplasmonic crystals due to excitation of multiple waveguide and plasmon modes

A. L. Chekhov, V. L. Krutyanskiy, A. N. Shaimanov, A. I. Stognij, and T. V. Murzina
Opt. Express 22(15) 17762-17768 (2014)

Metallic photonic crystal-based sensor for cryogenic environments

Timothy J. Palinski, Gary W. Hunter, Amogha Tadimety, and John X. J. Zhang
Opt. Express 27(11) 16344-16359 (2019)

Independently tunable double Fano resonances in asymmetric MIM waveguide structure

Jiwei Qi, Zongqiang Chen, Jing Chen, Yudong Li, Wu Qiang, Jingjun Xu, and Qian Sun
Opt. Express 22(12) 14688-14695 (2014)

View More...

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (9)
Fig. 1
Fig. 1 (a) AFM image of the InGaZnO film fabricated by PLD. (b) Transmission spectra of InGaZnO films with different composition ratios.

Download Full Size | PDF

Fig. 2
Fig. 2 Structural composition of InGaZnO-waveguided MPCs sitting on fused silica substrate and light-incident geometry for the optical extinction spectroscopic measurements.

Download Full Size | PDF

Fig. 3
Fig. 3 SEM (a) and AFM (b) images of the MPCs on an InGaZnO waveguide.

Download Full Size | PDF

Fig. 4
Fig. 4 Optical extinction spectroscopic measurements on the MPCs on InGaZnO waveguides with different thickness for (a) TM and (b) TE polarizations.

Download Full Size | PDF

Fig. 5
Fig. 5 Doubly resonant modes for thick InGaZnO waveguides: (a) T = 270 nm, TE polarization; (b) T = 270 nm, TM polarization; (c): T = 350 nm, TE polarization; (d): T = 350 nm, TM polarization.

Download Full Size | PDF

Fig. 6
Fig. 6 (a), (b), and (c): sensor measurements on the concentration of glucose/water solutions using MPCs with a waveguide thickness of 110 nm, 270 nm, and 350 nm, respectively. (d): comparison of the sensor performance defined by amplitude of the sensor signal as a function of the solution concentration between sensor devices with different waveguide thicknesses.

Download Full Size | PDF

Fig. 7
Fig. 7 (a) Angle-resolved tuning properties of the optical extinction spectrum for MPCs with a waveguide thickness of 350 nm. Pure water has been circulating in the sensor channels. Transmission spectrum through the sensor and that through the MPC as the signal in the calculation of the extinction spectra. (b) Sensor signal spectra at different concentrations of glucose/water solutions. The transmission spectrum through pure water was used as the blank and that through glucose solution as the signal.

Download Full Size | PDF

Fig. 8
Fig. 8 Comparison of the amplitude of the sensor signal as a function of the concentration of the glucose/water solution at different angles of incidence for T = 350 nm.

Download Full Size | PDF

Fig. 9
Fig. 9 (a) Simulated transmission spectra with the incident angle increased from 0 to 14 degrees for the sensor device having a waveguide thickness of 350 nm, where the two resonance modes are overlapped at an incident angle of 10 degrees, as indicated by the red spectrum. (b) Variation of the spectral positions of the two resonance modes (A and B) around their overlap with increasing the refractive index of the environmental medium from 1.33 to 1.36. Inset: Enlarged spectrum at the approximate overlap position between the two resonance modes at an incident angle of 10 degrees.

Download Full Size | PDF

Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use