Open AccessIntegrated temperature sensor based on an enhanced pyroelectric photonic crystal
Author(s) -
Hai Lu,
Benattou Sadani,
Gwenn Ulliac,
Clément Guyot,
Nadège Courjal,
Manuel Collet,
Fadi Baida,
Maria–Pilar Bernal
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.016311
Subject(s) - materials science , lithium niobate , pyroelectricity , photonic crystal , optics , finite difference time domain method , optoelectronics , wavelength , photonics , sensitivity (control systems) , ferroelectricity , physics , electronic engineering , dielectric , engineering
In this paper, temperature variations are detected thanks to an enhanced nano-optical pyroelectric sensor. Sensing is obtained with the pyroelectric effect of lithium niobate (LN) in which, a suitable air-membrane photonic crystal cavity has been fabricated. The wavelength position of the cavity mode is tuned 11.5 nm for a temperature variation of only 32 °C. These results agree quite well with 3D-FDTD simulations that predict tunability of 12.5 nm for 32 °C. This photonic crystal temperature sensor shows a sensitivity of 0.359 nm/°C for an active length of only ~5.2 μm.