Nanoparticle acoustic resonance enhanced nearly degenerate four-wave mixing
Date
2016-06-09
Authors
Xiang, Dao
Gordon, Reuven
Journal Title
Journal ISSN
Volume Title
Publisher
ACS Photonics
Abstract
Nanoparticles have acoustic resonances in the 10 GHz to THz range, which makes them interesting for resonantly enhanced four-wave mixing applications such as frequency conversion. Using a nearly degenerate four-wave mixing setup and comparing with Rayleigh–Gans–Debye scattering, we estimate a nonlinear refractive index, n2, of approximately 2 × 10–5 cm2/MW for 22 nm polystyrene nanospheres in water at a difference frequency of 43 GHz. This is nearly 3 orders of magnitude larger than the typical below-band-gap nonlinear response of semiconductors. This strong high-frequency response may be ideal for four-wave frequency conversion in all-optical information technologies, with appropriately chosen nanoparticle sizes.
Description
Keywords
nonlinear nanophotonics, nanoparticles, acoustic vibration, four-wave mixing
Citation
Xiang, D., & Gordon, R. (2016). Nanoparticle acoustic resonance enhanced nearly degenerate four-wave mixing. ACS Photonics, 3(8), 1421–1425. https://doi.org/10.1021/acsphotonics.5b00757