Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Mikhail N. Pivnenko"'
Publikováno v:
Molecular Crystals and Liquid Crystals. 433:259-266
We demonstrate three electro-optic telecommunication devices operating at a wavelength λ = 1550 nm: an optical switch or modulator, a variable attenuator, and a rotatable waveplate. These devices make use of the electroclinic and ferroelectric prope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdcc03e53b9c9d42bdb6bb1b4189ecf0
https://doi.org/10.1080/15421400590954371
https://doi.org/10.1080/15421400590954371
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 328:111-118
Dynamic properties of ferroelectric liquid crystals have been studied by means of observation of electric, optical and mechanical responses to the step-like change of electric field strength. A resonance low-frequency mode interpreted as a texture on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c93fc6b5ca01c3fdbeb99c8acd44d33a
https://doi.org/10.1080/10587259908026051
https://doi.org/10.1080/10587259908026051
Publikováno v:
SPIE Proceedings.
In this paper we investigate Photonic Band Edge (PBE) lasing from a homologous series of non-symmetric bimesogen liquid crystals (the mesogenic units are not identical) with varying physical parameters. A homologous series was synthesised, where the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cdbcc6d551055a77fe16162fe1b28da
https://doi.org/10.1117/12.593330
https://doi.org/10.1117/12.593330
Publikováno v:
SPIE Proceedings.
Nonresonant random lasing from a dye-doped smectic A* scattering device is demonstrated. The field-induced scattering state of a low molar mass liquid crystal in the smectic A* phase is found to provide sufficient feedback to generate random lasing w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbb2a3a45617f8c07712be46eb891f07
https://doi.org/10.1117/12.593912
https://doi.org/10.1117/12.593912
Publikováno v:
SPIE Proceedings.
In this paper, we review our recent experimental work on coherent and incoherent liquid crystal lasers. For the coherent lasers, results are presented on thin-film photonic band edge lasing using dye-doped low molar mass liquid crystals in the self-o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4972c8a428bcb8c2fc4bac7c878f4bb
https://doi.org/10.1117/12.626460
https://doi.org/10.1117/12.626460
Autor:
JV DeGroot, Mikhail N. Pivnenko, Jonathan Paul Hannington, Marcus J. Coles, Oliver Hadeler, Martin Grasmann, Harry J. Coles, Terry Victor Clapp
Publikováno v:
SPIE Proceedings.
We demonstrate an electro-optic switch and a variable attenuator for telecommunication applications at λ=1550nm by employing the ferroelectric and electroclinic properties of an organosiloxane liquid crystal. In the ferroelectric SmC* phase an optic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89543237eaa38504fc9e17ae03ba5474
https://doi.org/10.1117/12.593106
https://doi.org/10.1117/12.593106
Autor:
Mikhail N. Pivnenko, Harry J. Coles
Publikováno v:
Nature. 436(7053)
Liquid crystal 'blue phases' are highly fluid self-assembled three-dimensional cubic defect structures that exist over narrow temperature ranges in highly chiral liquid crystals. The characteristic period of these defects is of the order of the wavel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49802d97ff4ed0e59375907de2595b26
https://pubmed.ncbi.nlm.nih.gov/16107843
https://pubmed.ncbi.nlm.nih.gov/16107843
Publikováno v:
SPIE Proceedings.
In this paper, we measure the emission energies of three different photonic band edge lasers containing nematic hosts which have slightly different physical properties. The low molar mass monomers used as nematic hosts are identical in terms of molec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18457dc4e0b7d3aac4136ed02117042e
https://doi.org/10.1117/12.532180
https://doi.org/10.1117/12.532180
Publikováno v:
SPIE Proceedings.
The birefringence of some different monomesogen and bimesogen liquid crystals has been determined. Birefringence is an important liquid crystal property in the context of display and optical communication applications. Members of the well known homol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ade7a4f0b1224c90a524596b11956371
https://doi.org/10.1117/12.532179
https://doi.org/10.1117/12.532179
Publikováno v:
SPIE Proceedings.
The lasing output characteristics of two different types of photonic band edge liquid crystal lasers have been investigated. The required helical structure or periodic change in the refractive index was realised by using either a chiral nematic or a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d71522c19709fca4e2a244321cece02
https://doi.org/10.1117/12.532178
https://doi.org/10.1117/12.532178