Large enhancement of fully resonant sum-frequency generation through quantum control via continuum states
- Department of Physics and Astronomy and Department of Chemistry, University of Wisconsin-Stevens Point, Stevens Point, Wisconsin 54481 (United States)
- Institute of Physics of the Russian Academy of Sciences, 660036 Krasnoyarsk (Russian Federation)
- Department of Chemistry and Biochemisty and Department of Physics and Astronomy, University of Missouri-St. Louis, St. Louis, Missouri 63121 (United States)
A theory of quantum control of short-wavelength sum-frequency generation, which employs the continuum states, is developed. The proposed scheme employs all-resonant coupling and trade-off optimization of the accompanying constructive and destructive quantum interference effects in the lower-order and higher-order polarizations controlled by the overlap of two autoionizinglike laser-induced continuum structures. The scheme does not rely on adiabatic passage, coherent population trapping or maximum atomic coherence as a means to facilitate maximum output. The opportunities for manipulating transparency of the medium and refractive index for the fundamental and generated radiations, as well as nonlinear polarization in the multiple-resonant medium, are shown. This opens the feasibility of creating frequency-tunable narrowband filters, polarization rotators, and dispersive elements for vacuum ultraviolet radiation. The features specific for quantum interference in Doppler-broadened media are investigated. The feasibility of almost complete conversion of long-wavelength fundamental radiation into generated short-wavelength radiation, and of a dramatic decrease in the intensity of required fundamental radiations, is shown.
- OSTI ID:
- 20641056
- Journal Information:
- Physical Review. A, Vol. 69, Issue 4; Other Information: DOI: 10.1103/PhysRevA.69.043816; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AUTOIONIZATION
CONTROL
CONVERSION
COUPLING
FAR ULTRAVIOLET RADIATION
FILTERS
INTERFERENCE
LASER RADIATION
MULTI-PHOTON PROCESSES
NONLINEAR PROBLEMS
OPACITY
OPTICS
OPTIMIZATION
PHOTON-ATOM COLLISIONS
POLARIZATION
POPULATION INVERSION
RADIATION PRESSURE
REFRACTIVE INDEX
TRAPPING
VISIBLE RADIATION
WAVELENGTHS