Abstract

Optical cavity has found many applications in integrated photonics [1-2], micro/nano-laser [3-4], luminescence enhancement [5], and nonlinear optics [6]. To achieve high performances on the applications, an optical cavity with a high Purcell factor Q/Vm is desired, where Q and Vm de-notes the quality factor and mode volume. Unfortunately, mode volumes are limited by diffraction limit. Plasmonic cavities can squeeze light in volumes significantly smaller than the diffraction limit and have drawn lots of attention recently. To fabricate multilayer and three-dimensional plasmonic nanostructures, laser-induced forward transfer (LIFT) is a simple and low -cost writing technique to choose. LIFT technique is very fascinating for the throughput and fast prototyping of various nanophotonic devices. In our research, we implement the femtosecond LIFT (fs-LIFT) technique to fabricate square-shaped multilayer plasmonic resonant cavities, and study their optical properties by both experiments and numerical simulations.

© 2014 Japan Society of Applied Physics, Optical Society of America