Open AccessNumerical study of sensitivity enhancement in a photonic crystal microcavity biosensor due to optical forces
Author(s) -
Adam T. Heiniger,
Benjamin L. Miller,
Philippe M. Fauchet
Publication year - 2015
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.23.025072
Subject(s) - photonic crystal , optical force , biosensor , optics , sensitivity (control systems) , materials science , optical power , microfluidics , optical tweezers , particle (ecology) , optoelectronics , photonics , nanotechnology , laser , physics , electronic engineering , oceanography , engineering , geology
Photonic crystal microcavity biosensors can detect single biomolecules, but reliance on diffusion from microfluidic flow for particle delivery limits the minimum detectable particle concentration. Here the particle equation of motion is solved to find the sensitivity enhancement due to optical forces. The enhancement is examined for a range of parameters, including input optical power, fluid flow rate, device quality factor, and particle size.