Guided-mode Resonance
Guided-mode Resonance - Related Videos
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
0 Views •
Cited by 35 •
2013
The customized techniques developed in our lab to build microwave photonics systems based on ultra-high Q whispering gallery mode resonators are presented. The protocols to obtain and characterize these resonators are detailed, and an explanation of some of their applications in microwave photonics is given.
12:21
Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
0 Views •
Cited by 1 •
2016
Efficient generation of nonlinear phenomena related to third order optical non-linear susceptibility Χ(3) interactions in triply resonant silica microspheres is presented in this paper. The interactions here reported are: Stimulated Raman Scattering (SRS), and four wave mixing processes comprising Stimulated Anti-stokes Raman Scattering (SARS).
09:36
Characterization of Anisotropic Leaky Mode Modulators for Holovideo
0 Views •
Cited by 2 •
2016
This work describes fabrication and characterization of anisotropic leaky mode modulators for holographic video.
01:07
What is a Mode?
0 Views •
2023
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set. There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times. A data set with two modes is called bimodal. For example,...
02:52
Resonance
0 Views •
2020
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. If nitrite ions do indeed contain a single and a double bond, the two bond lengths are expected to be different. A double bond between two atoms is shorter (and stronger) than a single bond between the same two atoms. However, experiments show that both N–O bonds in NO2− have the same strength and length, and are identical in all other...
FAQs
The decisive condition is phase matching between the incoming light and the guided mode. At that condition, the periodic or nanostructured surface couples light into a leaky waveguide mode, creating a sharp wavelength-dependent feature in reflection or transmission. The feature therefore provides the optical signal whose position can be monitored when the surrounding environment changes.
Temporary confinement matters because the coupled light does not remain permanently trapped. It resides in the structure before radiating back out, allowing the interaction to appear as a distinct spectral feature. This leakage produces measurable structure in reflected or transmitted light rather than eliminating the optical signal, which is essential for observing resonance changes.
Binding changes the optical environment around the surface, and the resulting refractive-index change shifts the resonance wavelength. Because the shift can be observed without attaching an optical label to the target, the method can report molecular recognition through a spectral response. This principle supports detection of antibodies, antigens, and proteins.
The resonance can appear as a sharp wavelength-dependent feature in either reflected or transmitted light. Monitoring the position of that feature provides a way to detect changes associated with binding or with the surrounding refractive index. Using these optical responses allows the structure to function as a label-free sensing platform rather than requiring a separate detection label.
Researchers monitor the resonance produced by a periodic or nanostructured optical surface and then examine whether its wavelength changes when a target binds or the surrounding refractive index changes. The measured shift supplies the sensing output. This workflow can be applied to molecular targets such as antibodies, antigens, proteins, and microbial components.
Its label-free refractive-index response can support rapid biosensing of biologically relevant targets. In immunology, the approach can help analyze antibody and antigen recognition, while infection research can use it for microbial-target detection and pathogen identification. These applications connect a wavelength shift in the optical structure with molecular or microbial interactions of research interest.