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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Updated: Jun 22, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Planar corner-cut square microcavities: ray optics and FDTD analysis.

Chung Yan Fong, Andrew Poon

    Optics Express
    |June 2, 2009
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    Summary
    This summary is machine-generated.

    Corner-cut square microcavities offer efficient planar microcavity solutions. Simulations show they support traveling-wave resonances for optimized add-drop filter performance.

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    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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    Published on: November 30, 2012

    Area of Science:

    • Optics and Photonics
    • Nanophotonics
    • Integrated Photonics

    Background:

    • Planar microcavities are essential components in integrated photonic circuits.
    • Exploring novel microcavity designs is crucial for advancing photonic device performance.

    Purpose of the Study:

    • To investigate corner-cut square microcavities as a novel alternative to traditional planar microcavities.
    • To analyze their resonant properties and suitability for add-drop filter applications.

    Main Methods:

    • Ray tracing analysis to understand light-matter interactions within the microcavity.
    • Two-dimensional finite-difference time-domain (FDTD) simulations to model device behavior.
    • Fourier transform analysis in k-space to study modal composition.

    Main Results:

    • Identified open-ray orbits that oscillate and maintain circulation sense via corner-cut facet reflections.
    • Demonstrated that waveguide-coupled corner-cut square microcavities support traveling-wave resonances.
    • Achieved desirable add-drop filter responses, optimizable by adjusting waveguide width.

    Conclusions:

    • Corner-cut square microcavities are a promising design for planar photonic devices.
    • Modal oscillations within these cavities are confirmed and contribute to filter performance.
    • The design offers a pathway to optimize add-drop filter characteristics through waveguide engineering.