The Influence of an Extended Optical Mode on the Performance of Microcavity Forced Oscillator

Abstract

In this work, we studied theoretically and experimentally the induction of electromagnetic forces in one-dimensional photonic crystals when light impinges with a TM polarization. The photonic structure consists of an optical microcavity formed of two one-dimensional photonic crystals made of free-standing porous silicon, separated by a variable air gap. The working wavelength is the extended optical mode at 633 nm. We show experimental evidence for the force induced when the photonic structure can make forced oscillations. We measured peak displacements and velocities ranging from 1.97 up to 4.49 microns and 0.93 up to 1.27 mm/s for external frequencies 75 and 45 Hz, respectively. The light power was 45 mW with an angle of incidence of 5∘.