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]:

Design and fabrication of evanescent wavefiber optic sensor

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.

QuantuM-nano: Quantum Measurements with Bose-Einstein condensates strongly coupled to nanophotonic structures

A guided light ray in a bending fiber has evanescent field that propagates in the cladding.

Study of macro-bending of polymer fiber in multimode POF couplers development by lapping technique

Part of the light will penetrate into the upper cladding layer and this portion of light is known as the evanescent field.

Low loss optimization of strip channel polysilicon waveguide fabrication

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.

Far-field tunable nano-focusing based on metallic slits surrounded with nonlinear-variant widths and linear-variant depths of circular dielectric grating

Key words: optical fibre, diode-array, interferometer, evanescent field

Portable surface plasmon resonance phenomenon (SPR)-based biosensors

It can also be used as a cladding layer of an intrinsic fiber sensor using evanescent field excitation.

Hybrid coatings as transducers in optical biosensors

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.

Optical fibers research advances

When the plasmon reaches the tip end, it generates a strong evanescent field within a region on the order of the tip end diameter.

Electromagnetic simulation helps to optimize optical microscope resolution: a new tip design derivers enhanced sub-20 nanometer performance

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.

Plasmonic Technology: Novel Approach to Ultrasensitive Immunoassays

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.

Not-so-remote sensing in vineyards

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.