Efficient generation of a narrow-bandwidth and frequency-modulated beam pair from Yb atoms in a ladder configuration

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033814· OSTI ID:21541371

Song, Minsoo; Yoon, Tai Hyun ^[1]

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1. Department of Physics, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713 (Korea, Republic of)

We report on the generation of narrow-bandwidth and frequency-modulated cascaded emission of two photons from a collimated Yb atomic beam. Efficient population transfer from the ground state (6s{sup 2} {sup 1}S{sub 0}) to upper state (6s7s {sup 1}S{sub 0}), of which direct transition at 291.1 nm is dipole forbidden, is achieved through a resonant two-photon excitation enhanced by the electromagnetically induced transparency mediated by the intermediate state (6s6p {sup 1}P{sub 1}). Then cascaded emission of two photons with a bandwidth of 54 MHz at 611.3 nm (idler) and 555.8 nm (signal) occurs in sequence from the upper state via the spin triplet state (6s{sup 2} {sup 3}P{sub 1}). Numerical calculations of the density matrix equations taking into account the residual Doppler effect and strong driving fields successfully explain the experimental results for the idler and signal beam intensities depending on the various parameters of the driving fields. Synchronized optical switching and frequency-modulation characteristics of the idler and signal beams are also reported.

• OSTI ID: 21541371
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033814; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC BEAMS
DENSITY MATRIX
DOPPLER EFFECT
EXCITATION
FREQUENCY MODULATION
GROUND STATES
INTERMEDIATE STATE
LEVEL WIDTHS
MHZ RANGE
OPACITY
PHOTON EMISSION
PHOTONS
POPULATION INVERSION
SIGNALS
SPIN
TRIPLETS
YTTERBIUM
ANGULAR MOMENTUM
BEAMS
BOSONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FREQUENCY RANGE
MASSLESS PARTICLES
MATRICES
METALS
MODULATION
MULTIPLETS
OPTICAL PROPERTIES
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RARE EARTHS