Sensitive frequency dependence of the carrier-envelope phase effect on bound-bound transitions: An interference perspective

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053407· OSTI ID:21528667

Dian, Peng; Panming, Fu; Bingbing, Wang ^[1]; Biao, Wu ^[2]; Jiangbin, Gong ^[3]; Zongchao, Yan ^[4]

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1. Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2. International Center for Quantum Materials, Peking University, Beijing 100871 (China)
3. Department of Physics and Center of Computational Science and Engineering, National University of Singapore, Singapore 117542 (Singapore)
4. Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick, Canada E3B 5A3 (Canada)

We investigate numerically with Hylleraas coordinates the frequency dependence of the carrier-envelope phase (CEP) effect on bound-bound transitions of helium induced by an ultrashort laser pulse of a few cycles. We find that the CEP effect is very sensitive to the carrier frequency of the laser pulse, occurring regularly even at far-off-resonance frequencies. By analyzing a two-level model, we find that the CEP effect can be attributed to the quantum interference between neighboring multiphoton transition pathways, which is made possible by the broadened spectrum of the ultrashort laser pulse. A general picture is developed along this line to understand the sensitivity of the CEP effect to the laser's carrier frequency. Multilevel influence on the CEP effect is also discussed.

• OSTI ID: 21528667
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARRIERS
COORDINATES
ELEMENTS
FLUIDS
FREQUENCY DEPENDENCE
GASES
HELIUM
HYLLERAAS COORDINATES
INTERFERENCE
LASERS
LINE BROADENING
MULTI-PHOTON PROCESSES
NONMETALS
PULSES
RARE GASES
RESONANCE
SENSITIVITY
SPECTRA