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