OPTICAL RESEARCH: STUDY DATA FROM YEREVAN STATE UNIVERSITY UPDATE KNOWLEDGE OF OPTICAL RESEARCH

Science Letter
March 17, 2009

"The specific features of defect modes of chiral photonic crystals
with an anisotropic defect have been investigated. Peculiarities of the
spectra of polarization observables of the system under consideration
are analyzed at different thicknesses of the defect layer," scientists
in Yerevan, Armenia report (see also Optical Research).

"It is shown that single refraction occurs in a defect mode,
even though the system is anisotropic and inhomogeneous. We also
investigated the specific features of the spectra of the photon density
of states, light intensity at the defect center, and the Q factor of
defect modes at different thicknesses of the defect layer and chiral
photonic crystals. It is shown that the lasing wavelength of chiral
photonic crystals with an anisotropic defect enriched in laser dyes
(resonant atoms) can be controlled in a different way: by varying
the defect layer thickness," wrote A. Gevorgyan and colleagues,
Yerevan State University.

The researchers concluded: "It is shown that this system can operate
as a narrow-band filter (mirror) with a controlled frequency width
and location of the total transmission (reflection) range on the
frequency scale."

Gevorgyan and colleagues published their study in Optics and
Spectroscopy (Specific features of the emission of chiral photonic
crystals with an anisotropic defect: I. Thickness effects. Optics
and Spectroscopy, 2009;106(1):43-49).

For additional information, contact A. Gevorgyan, Yerevan State
University, Yerevan 375025, Armenia.

The publisher’s contact information for the journal Optics and
Spectroscopy is: Maik Nauka, Interperiodica, Springer, 233 Spring St.,
New York, NY 10013-1578, USA.