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Title: All-optical on-chip sensor for high refractive index sensing

Abstract

A highly sensitive sensor design based on two-dimensional photonic crystal cavity is demonstrated. The geometric structure of the cavity is modified to gain a high quality factor, which enables a sensitive refractive index sensing. A group of slots with optimized parameters is created in the cavity. The existence of the slots enhances the light-matter interactions between confined photons and analytes. The interactions result in large wavelength shifts in the transmission spectra and are denoted by high sensitivities. Experiments show that a change in refractive index of Δn ∼ 0.12 between water and oil sample 1 causes a spectral shift of 23.5 nm, and the spectral shift between two oil samples is 5.1 nm for Δn ∼ 0.039. These results are in good agreement with simulations, which are 21.3 and 7.39 nm for the same index changes.

Authors:
 [1];  [2]
  1. Foundation for Fundamental Research on Matter, Van Vollenhovenlaan 659, 3527 JP, Utrecht (Netherlands)
  2. Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen (Netherlands)
Publication Date:
OSTI Identifier:
22415122
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 3; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTAL DEFECTS; CRYSTALS; INTERACTIONS; PHOTONS; QUALITY FACTOR; REFRACTIVE INDEX; SENSORS; SIMULATION; SPECTRAL SHIFT; WATER

Citation Formats

Liu, Yazhao, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, and Salemink, H. W. M.,. All-optical on-chip sensor for high refractive index sensing. United States: N. p., 2015. Web. doi:10.1063/1.4906576.
Liu, Yazhao, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, & Salemink, H. W. M.,. All-optical on-chip sensor for high refractive index sensing. United States. doi:10.1063/1.4906576.
Liu, Yazhao, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, and Salemink, H. W. M.,. Mon . "All-optical on-chip sensor for high refractive index sensing". United States. doi:10.1063/1.4906576.
@article{osti_22415122,
title = {All-optical on-chip sensor for high refractive index sensing},
author = {Liu, Yazhao and Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft and Salemink, H. W. M.,},
abstractNote = {A highly sensitive sensor design based on two-dimensional photonic crystal cavity is demonstrated. The geometric structure of the cavity is modified to gain a high quality factor, which enables a sensitive refractive index sensing. A group of slots with optimized parameters is created in the cavity. The existence of the slots enhances the light-matter interactions between confined photons and analytes. The interactions result in large wavelength shifts in the transmission spectra and are denoted by high sensitivities. Experiments show that a change in refractive index of Δn ∼ 0.12 between water and oil sample 1 causes a spectral shift of 23.5 nm, and the spectral shift between two oil samples is 5.1 nm for Δn ∼ 0.039. These results are in good agreement with simulations, which are 21.3 and 7.39 nm for the same index changes.},
doi = {10.1063/1.4906576},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 3,
volume = 106,
place = {United States},
year = {2015},
month = {1}
}