%A Bui Thanh Tung %A Dzung Viet Dao %A Taro Ikeda %A Yoshiaki Kanamori %A Kazuhiro Hane %A Susumu Sugiyama %J Optic Express %T Investigation of Strain Sensing Effect in Modified Single-Defect Photonic Crystal Nanocavity %X This paper reports the theoretical and experimental investigations on the strain sensing effect of a two dimensions (2D) photonic crystal (PhC) nanocavity resonator. By using the finite element method (FEM) and finite difference time domain (FDTD) simulations, the strain sensitivity of a high quality factor PhC nanocavity was calculated. Linear relationships between the applied strain and the shift in the resonant wavelength of the cavity were obtained. A single-defect silicon (Si) PhC cavity was fabricated, and measurements of the strain sensitivity were performed. Good agreement between the experimental and simulation results was observed. %N 9 %P 8821-8829 %V 19 %D 2011 %R http://dx.doi.org/10.1364/OE.19.008821 %L SisLab194