Two-dimensional bound states of ultrashort light pulses and polarisation of light in ferroelectric impurity crystals

The polarisation evolution of a ferroelectric crystal after its illumination by ultrashort laser pulses is described theoretically and numerically by using the microscopic pseudospin formalism. Parameters are found for which quasi-two-dimensional long-lived states can exist in ferroelectrics. For di...

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Published inQuantum electronics (Woodbury, N.Y.) Vol. 37; no. 5; pp. 465 - 470
Main Authors Sasov, A S, Belonenko, M B, Demushkina, E V
Format Journal Article
LanguageEnglish
Russian
Published Woodbury, NY IOP Publishing 31.05.2007
American Institute of Physics
Subjects
ATOMIC AND MOLECULAR PHYSICS
BOUND STATE
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DIELECTRIC MATERIALS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
FERROELECTRIC MATERIALS
ILLUMINANCE
LASER RADIATION
MATERIALS
POLARIZATION
PULSES
RADIATIONS
TWO-DIMENSIONAL CALCULATIONS
VISIBLE RADIATION
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Summary:The polarisation evolution of a ferroelectric crystal after its illumination by ultrashort laser pulses is described theoretically and numerically by using the microscopic pseudospin formalism. Parameters are found for which quasi-two-dimensional long-lived states can exist in ferroelectrics. For different initial conditions, the dynamics of bound states of the electromagnetic field and polarisation of the crystal is presented and properties of ferroelectrics with impurities and without them are compared. (nonlinear optical phenomena)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2007v037n05ABEH013204