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Now showing items 11-20 of 21
Tunable photon lifetime in photonic molecules: a concept for delaying an optical signal
(2005)
We experimentally and theoretically studied the photon lifetime spectral distribution in two coherently
coupled spherical microcavities of
3?16
m
diameter forming a photonic molecule, which shows a multi-
peak narrowband ...
Mode manipulation in small microsphere systems
(2008)
In this work we demonstrate the possibility of mode manipulation in systems of symmetric photonic molecules
formed by placing several microspheres in contact. We observe photonic nanojets that reflect the symmetry of
the ...
Conical diffraction and Bessel beam formation with a high optical quality biaxial crystal
(2009)
The manipulation of a Gaussian laser beam using conical
diffraction in a high optical quality biaxial crystal of KGd(WO4)2 has been
examined in detail with emphasis on the experimental techniques involved
and intuitive ...
CdTe Quantum Dot/Dye Hybrid System as Photosensitizer for Photodynamic Therapy
(2010)
We have studied the photodynamic properties
of novel CdTe quantum dots?methylene blue hybrid
photosensitizer. Absorption spectroscopy, photolumines-
cence spectroscopy, and fluorescence lifetime imaging of
this system ...
Energy transfer processes in semiconductor quantum dots: bacteriorhodopsin hybrid system
(2009)
The potential impact of nanoscience on energy transfer processes in biomolecules was investigated on the example of a
complex between fluorescent semiconductor nanocrystals and photochromic membrane protein. The ...
Polarisation distribution for internal conical diffraction and the superposition of zero and first order bessel beams
(2008)
Internal conical refraction leads to the formation of zero (J0) and first order (J1) Bessel beams in superposition. The
(J0) beam retains the input circular polarisation and the (J1) has opposite polarisation but with a ...
Interaction of surface plasmons with CdTe quantum dot excitons
(SPIE, 2005)
A 5-fold enhancement in the luminescence of CdTe nanocrystal quantum dots (QDs) is observed when they are placed in
proximity to a nanostructured Au film deposited by pulsed laser deposition technique. No enhancement is ...
Amplified spontaneous emission from a microtube cavity with whispering gallery modes
(2007)
We present a detailed study of the photonic modes in microtube cavity of ~ 7-8 ?m outer diameter that can act as micron-scale optical cylindrical resonator. We demonstrate a new route to the fabrication of individual ...
Spontaneous emission enhancement in a microtube cavity with highly confined optical modes'
(SPIE, 2007)
A detailed study of the photonic modes in microtube cavity of ~ 7-8 ?m outer diameter is presented. We demonstrate a new route to the fabrication of individual microtubes with the maximum length of 200 ?m, using a vacuum ...
Generation of continuously tunable fractional optical orbital angular momentum using internal conical diffraction
(2010)
When a left-circularly polarised Gaussian light beam, which has
spin angular momentum (SAM)
J
sp
=
?
?
= 1
?
per photon, is incident along
one of the optic axes of a slab of biaxial crystal it undergoes internal ...