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Updated: Jul 18, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Scattering of vacuum states by dynamic plasmon singularities: generating photons from vacuum
1Department of Physics and Division of Engineering, Brown University, Providence, Rhode Island 02906, USA. nlawandy@spsy.com
Abstract:
A metallic nanoparticle surrounded by an amplifying medium results in a boundary condition that creates a singularity in the particle's dynamic polarizability at a critical value of the gain. When this boundary condition is time dependent, parametric excitation of the electromagnetic vacuum results in photon emission. Estimates of the vacuum emission from nanostructures embedded in high-gain laser dyes excited by femtosecond lasers predict energies nearly 2 orders of magnitude larger than the spontaneous emission background.
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