evanescent field


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evanescent field

In an optical fiber, the light that passes from the core into the cladding. See fiber optics glossary.
References in periodicals archive ?
P(0)and Pare respectively, the transmitted power through the fiber without and with an analyte over the removed portion of length L, C is the concentration of solution and [gamma] is the evanescent field absorption coefficientis defined as[13]:
In this project, we plan to explore an emerging field of quantum technologies at the boundary between atomic physics and nanoscience, by studying the properties of Bose-Einstein condensates coupled to the evanescent field of nanophotonic structures.
A guided light ray in a bending fiber has evanescent field that propagates in the cladding.
Part of the light will penetrate into the upper cladding layer and this portion of light is known as the evanescent field.
Since surface plasmon polaritons is bound to a metal surface, it is an evanescent field in the vertical direction with exponential decay in amplitude and cannot reach the far field.
Key words: optical fibre, diode-array, interferometer, evanescent field
It can also be used as a cladding layer of an intrinsic fiber sensor using evanescent field excitation.
The 14 papers here describe such applications as evanescent field tapered fiber optic biosensor fabrication and applications in antibody detection and immobilization, Raman amplification for communication systems, Bragg gratings in high birefringence optical fibers, applications of hollow optical fibers in atom optics, physical modeling of ring lasers, optical power budgets, all-fiber devices for optical networks, optical differential phase shift keying, polymer optical fibers, dissipative solitons in polymer systems, pulses in averaged and dispersion-managed systems, gap solitons in hollow core photonic crystal fibers, multilength optical fiber lasers and semiconductor optical amplifier ring lasers, and the impact of aging on reliability in single-mode silica optical fibers.
When the plasmon reaches the tip end, it generates a strong evanescent field within a region on the order of the tip end diameter.
A strong evanescent field induced by surface plasmons can excite a layer of fluorophores that extends up to ~200 nm above a thin metallic film into the liquid sample.
Designed by Peter Lye at the University of New England, the fiber evanescent field absorbance (FEFA) device is an optical fiber consisting of silica core, cladding and outer protective jacket.
Due to the exponential character of the intensity function in formula (1), even layers lying lower in the sample will be illuminated by the evanescent field.