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Laser Physics

Phonon-photon interactions with a trapped ion in a cavity

Miguel Orszag

Published Jan 1, 2002• 4 citations
OpenAlex

Abstract

A trapped ion in a cavity can be used either to translate phonon to photon statistics when pumped incoherently, or transfer squeezing from phonons to photons, when the electronic pump is coherent and one has a particular phonon pump.

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Physical Review A•Mar 24, 2008•4 citations
The variance of the time dependent atomic positions and momenta is directly mapped into the quantum uctuations of the photon number of the scattered probing light. A fully quantum de-scription of the non-linear interactions between photonic and phononic fields unveils evidences of squeezing of thermal phonons. In here a pump-probe spectroscopy was proposed to observe phonon squeezing in solids. Numerical simulation showed pump-probe response due to coherent phonon and squeezed phonon in alpha-quartz.
We have developed a general method to perform optical pumping by a pulsed laser with the aid of an optical cavity (cavity-assisted optical pumping). Optical pumping is achieved by repetitive interaction of a single laser pulse with a target material in the cavity. This method is demonstrated for manganese ions, Mn+{\text{Mn}}^{+}Mn+, stored in a linear radio-frequency ion trap; about 108{10}^{8}108 ions are spin polarized by a 5-ns laser pulse via ${^{7}P}_{J}\ensuremath{\leftarrow}{^{7}S}_{3}$ (J=3J=3J=3 or 4) transition in the ultraviolet region. The linewidth of the pulsed light source is broad enough to transfer the populations of lower hyperfine levels to the highest one (F=11/2)(F=11/2)(F=11/2) in the 7S3{^{7}S}_{3}7S3​ ground state; the nuclear spin is polarized as well.