Vacuum-mediated multiphoton transitions - art. no. 051402

Citation
Jr. Bochinski et al., Vacuum-mediated multiphoton transitions - art. no. 051402, PHYS REV A, 6305(5), 2001, pp. 1402
Citations number
33
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
10502947 → ACNP
Volume
6305
Issue
5
Year of publication
2001
Database
ISI
SICI code
1050-2947(200105)6305:5<1402:VMT-AN>2.0.ZU;2-J
Abstract
We have measured the emission spectra of two-level-like atoms driven by a s patially inhomogeneous bichromatic field comprised of one resonant and one off-resonant component. Under these excitation conditions, observed spectra consist of several narrow peaks appearing on top of a broad continuumlike structure. This experimental approach provides for selective observation of those spectral features having a Rabi-frequency-independent emission frequ ency. Such emission processes involve multiphoton transitions: with one leg being spontaneous, between dressed-state levels differing only in their ph otonic quantum numbers. i.e., between equivalent dressed-state-doublet subl evels. Related vacuum-mediated transitions have recently been invoked as an underlying mechanism of inversionless gain.