optical transition

optical transition

[′äp·tə·kəl tran′zish·ən]
(physics)
A process in which an atom or molecule changes from one energy state to another and emits or absorbs electromagnetic radiation in the visible, infrared, or ultraviolet region.
References in periodicals archive ?
Figure 3 indicates an absorption edge at about 840 nm due to the optical transition from the valence band and conduction band.
The MCM can be placed on one end or both ends of the fiber link as an alternative to utilizing an optical transition assembly, such as a breakout module or harness, at the link endpoints.
The variation in the frequency of the S-D optical transition relative to NIST-F1 was found to be less than [+ or -] 10 fHz/Hz over the 2 years.
1 eV below the lowest optical transition, and because this indirect transition occurs at a lower energy, it is more likely that electrons would lose their energy to phonons than to light.
Objectives The objectives of Phase 2B Phase 2B are extending support to MTPTC and build capacity for the rehabilitation of post-earthquake neighborhoods, an optical transition and transfer of capacity to the Department MTPTC resume these activities in an effective and comprehensive manner.
He reviews classical optics, the treatment of optical transition rates by quantum theory, crystalline materials, glasses, and molecular solids, along with subjects not usually covered in standard texts like semiconductor quantum wells, molecular materials, vibronic solid-state lasers, and nonlinear optics.
Fplf[alpha]] is the electronic optical transition matrix element between the ground state labeled by Fplf[alpha] and the exc ited state labeled by F'p'[beta].
The measurement was made relative to a known optical transition in calcium using a new femtosecondlaser frequency comb.
The realization of high resolution laser spectroscopy of atomic frequency standards based on highly forbidden optical transitions has been made possible by the preparation of atomic states using laser state manipulation and laser cooling in a MOT.
ABOUT TRANSITIONS OPTICAL Transitions Optical is the leading provider of plastic photochromic (adaptive) lenses to optical manufacturers worldwide.
On the theoretical level, a paradox of electrodynamics is explained in terms of classical mechanics, and experimental proofs of optical transitions in nonlinear optical phenomena are presented.
Over the last decade a new kind of frequency standard has been developed that is based on optical transitions, the so-called optical clock," says Stefan Droste, a researcher at the Max Planck Institute of Quantum Optics.

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