| Issue |
EPL
Volume 107, Number 3, August 2014
|
|
|---|---|---|
| Article Number | 34008 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/107/34008 | |
| Published online | 01 August 2014 | |
All-optical on-chip sensor for high refractive index sensing in photonic crystals
1 Foundation for Fundamental Research on Matter - Van Vollenhovenlaan 659, 3527 JP, Utrecht, The Netherlands
2 Kavli Institute of Nanoscience, Delft University of Technology - Lorentzweg 1, 2628 CJ, Delft, The Netherlands
3 Institute for Molecules and Materials, Radboud University Nijmegen - Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
Received: 4 June 2014
Accepted: 13 July 2014
In this paper we demonstrate an optical sensor designed to detect material infiltrations with relatively high indices, based on a two-dimensional photonic crystal cavity structure. The locations and sizes of the holes surrounding a L3 cavity were modified to increase the Q factor to a value of 1500 with a high refractive index infilling of 
. With precise design and simulation, we overcome the difficulty of low index contrast, and observe a very clear wavelength shift of 10.4 nm in simulation and 12.4 nm in experiment between water 
and oil 
samples at resonance.
PACS: 42.70.Qs – Photonic bandgap materials / 07.07.Df – Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
© EPLA, 2014
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