Evanescent Excitation and Emission

2014 ◽  
pp. 1-14
Author(s):  
Daniel Axelrod
Keyword(s):  
Evanescent Excitation

Compact 3D printed module for fluorescence and label-free imaging using evanescent excitation

2017 ◽  
Vol 6 (1) ◽  
pp. 015007 ◽  
Author(s):  
Vikas Pandey ◽  
Shalini Gupta ◽  
Ravikrishnan Elangovan
Keyword(s):  
Label Free ◽  
3D Printed ◽  
Evanescent Excitation

Total Internal Reflection Fluorescence for Adsorbed Probe Molecule Studies of Liquid/Solid Interfacial Environments

1989 ◽  
Vol 43 (1) ◽  
pp. 81-87 ◽  
Author(s):  
K. C. Hartner ◽  
J. W. Carr ◽  
J. M. Harris
Keyword(s):  
Total Internal Reflection ◽  
Saturated Vapor ◽  
Fused Silica ◽  
Internal Reflection ◽  
Total Internal Reflection Fluorescence ◽  
Depth Of Penetration ◽  
Excitation Beam ◽  
Adsorption Equilibria ◽  
Evanescent Excitation ◽  
Fluorescent Molecules

Total internal reflection fluorescence (TIRF) is developed as a surface selective method to allow the environment of a liquid/solid interface to be probed by fluorescent molecules which are adsorbed from solution. The method has been used to detect pyrene sorbed to an octadecylsilane-derivatized fused-silica plate and resolve its spectral emission so that vibronic intensity ratios can be calculated and the surface environment characterized. Adsorption equilibria of the fluorescent probe to the surface and the depth of penetration of the evanescent excitation beam provide the basis for predicting interference from probe molecules in the solution phase. These predictions were validated by replacing the solution overlaying the alkylated silica interface with saturated vapor and comparing the apparent surface environments.

scholarly journals Evanescent excitation and collection of spontaneous Raman spectra using silicon nitride nanophotonic waveguides

2014 ◽  
Vol 39 (13) ◽  
pp. 4025 ◽  
Author(s):  
Ashim Dhakal ◽  
Ananth Z. Subramanian ◽  
Pieter Wuytens ◽  
Frédéric Peyskens ◽  
Nicolas Le Thomas ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Raman Spectra ◽  
Nanophotonic Waveguides ◽  
Evanescent Excitation

Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles

2020 ◽  
Vol 52 (11) ◽  
Author(s):  
Manfred Hammer ◽  
Lena Ebers ◽  
Jens Förstner
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Guided Waves ◽  
Strong Field ◽  
Field Enhancement ◽  
Analytic Solutions ◽  
Slab Waveguide ◽  
Dielectric Tube ◽  
Coupled Mode ◽  
Evanescent Excitation

AbstractA dielectric step-index optical fiber with tube-like profile is considered, being positioned with a small gap on top of a dielectric slab waveguide. We propose a 2.5-D hybrid analytical/numerical coupled mode model for the evanescent excitation of the tube through semi-guided waves propagating in the slab at oblique angles. The model combines the directional polarized modes supported by the slab with analytic solutions for the TE-, TM-, and orbital-angular-momentum (OAM) modes of the tube-shaped fiber. Implementational details of the scheme are discussed, complemented by finite-element simulations for verification purposes. Our results include configurations with resonant in-fiber excitation of OAM modes with large orbital angular momentum and strong field enhancement.

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