Trans-spectral orbital angular momentum transfer via four-wave mixing in Rb vapor

G. Walker, A. S. Arnold, S. Franke-Arnold

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

We report the transfer of phase structure and, in particular, of orbital angular momentum from near-infrared pump light to blue light generated in a four-wave-mixing process in Rb-85 vapor. The intensity and phase profile of the two pump lasers at 780 and 776 nm, shaped by a spatial light modulator, influences the phase and intensity profile of light at 420 nm, which is generated in a subsequent coherent cascade. In particular, we observe that the phase profile associated with orbital angular momentum is transferred entirely from the pump light to the blue. Pumping with more complicated light profiles results in the excitation of spatial modes in the blue that depend strongly on phase matching, thus demonstrating the parametric nature of the mode transfer. These results have implications on the inscription and storage of phase information in atomic gases.

LanguageEnglish
Article number243601
Number of pages5
JournalPhysical Review Letters
Volume108
Issue number24
DOIs
Publication statusPublished - 14 Jun 2012

Fingerprint

four-wave mixing
momentum transfer
angular momentum
vapors
orbitals
pumps
profiles
monatomic gases
light modulators
phase matching
cascades
pumping
excitation
lasers

Keywords

  • orbital angular momentum
  • trans-spectral
  • transfer
  • four-wave mixing
  • Rb vapor
  • spatial light modulator
  • pump lasers
  • atomic gases

Cite this

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abstract = "We report the transfer of phase structure and, in particular, of orbital angular momentum from near-infrared pump light to blue light generated in a four-wave-mixing process in Rb-85 vapor. The intensity and phase profile of the two pump lasers at 780 and 776 nm, shaped by a spatial light modulator, influences the phase and intensity profile of light at 420 nm, which is generated in a subsequent coherent cascade. In particular, we observe that the phase profile associated with orbital angular momentum is transferred entirely from the pump light to the blue. Pumping with more complicated light profiles results in the excitation of spatial modes in the blue that depend strongly on phase matching, thus demonstrating the parametric nature of the mode transfer. These results have implications on the inscription and storage of phase information in atomic gases.",
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Trans-spectral orbital angular momentum transfer via four-wave mixing in Rb vapor. / Walker, G.; Arnold, A. S.; Franke-Arnold, S.

In: Physical Review Letters, Vol. 108, No. 24, 243601, 14.06.2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Trans-spectral orbital angular momentum transfer via four-wave mixing in Rb vapor

AU - Walker, G.

AU - Arnold, A. S.

AU - Franke-Arnold, S.

PY - 2012/6/14

Y1 - 2012/6/14

N2 - We report the transfer of phase structure and, in particular, of orbital angular momentum from near-infrared pump light to blue light generated in a four-wave-mixing process in Rb-85 vapor. The intensity and phase profile of the two pump lasers at 780 and 776 nm, shaped by a spatial light modulator, influences the phase and intensity profile of light at 420 nm, which is generated in a subsequent coherent cascade. In particular, we observe that the phase profile associated with orbital angular momentum is transferred entirely from the pump light to the blue. Pumping with more complicated light profiles results in the excitation of spatial modes in the blue that depend strongly on phase matching, thus demonstrating the parametric nature of the mode transfer. These results have implications on the inscription and storage of phase information in atomic gases.

AB - We report the transfer of phase structure and, in particular, of orbital angular momentum from near-infrared pump light to blue light generated in a four-wave-mixing process in Rb-85 vapor. The intensity and phase profile of the two pump lasers at 780 and 776 nm, shaped by a spatial light modulator, influences the phase and intensity profile of light at 420 nm, which is generated in a subsequent coherent cascade. In particular, we observe that the phase profile associated with orbital angular momentum is transferred entirely from the pump light to the blue. Pumping with more complicated light profiles results in the excitation of spatial modes in the blue that depend strongly on phase matching, thus demonstrating the parametric nature of the mode transfer. These results have implications on the inscription and storage of phase information in atomic gases.

KW - orbital angular momentum

KW - trans-spectral

KW - transfer

KW - four-wave mixing

KW - Rb vapor

KW - spatial light modulator

KW - pump lasers

KW - atomic gases

U2 - 10.1103/PhysRevLett.108.243601

DO - 10.1103/PhysRevLett.108.243601

M3 - Article

VL - 108

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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