Coherent control of molecular hyperpolarizability at a desired frequency

Coherent control of the second-order hyperpolarizability γ of a nitrogen molecule ( N 2) at a desired frequency is demonstrated by using two laser fields and an initially prepared superposition of two states which interfere with one another. As a result of quantum interference, the γ magnitude of N...

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Bibliographic Details
Published inPhysics letters. A Vol. 264; no. 5; pp. 375 - 382
Main Author Xie, Rui Hua
Format Journal Article
LanguageEnglish
Published Elsevier B.V 03.01.2000
Subjects
33.15.Kr
32.10.Dk
42.65.An
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Summary:Coherent control of the second-order hyperpolarizability γ of a nitrogen molecule ( N 2) at a desired frequency is demonstrated by using two laser fields and an initially prepared superposition of two states which interfere with one another. As a result of quantum interference, the γ magnitude of N 2 at a desired frequency can be either constructively enhanced or strongly decreased depending on the relative amplitude and phase between two laser fields and those in the superposition state. This approach opens a door to achieving large γ magnitude of a molecule at a desired frequency, which is required for photonic applications.
ISSN:0375-9601
1873-2429
DOI:10.1016/S0375-9601(99)00826-9