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Related Concept Videos

Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Modes of Standing Waves: II01:04

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Coupled cavity-waveguide based on topological corner state and edge state.

Aoqian Shi, Bei Yan, Rui Ge

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    Researchers developed a topological coupled cavity-waveguide (TCCW) using topological corner and edge states for advanced photonic devices. This new approach offers enhanced optical localization and robustness for integrated photonics applications.

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    Area of Science:

    • Photonics
    • Condensed Matter Physics
    • Materials Science

    Background:

    • Topological states of light, including topological corner states (TCS) and topological edge states (TES), offer novel ways to control light propagation.
    • The development of integrated photonic devices relies on efficient light manipulation and confinement.

    Purpose of the Study:

    • To propose and investigate a topological coupled cavity-waveguide (TCCW) structure in two-dimensional (2D) photonic crystals.
    • To demonstrate the potential of TCCW for high-performance micro-nano integrated photonic devices.

    Main Methods:

    • Utilizing principles of TCS and TES to design the TCCW structure within a 2D photonic crystal.
    • Comparing the performance characteristics of the TCCW with conventional coupled cavity-waveguide (CCCW) structures.

    Main Results:

    • The proposed TCCW exhibits strong optical localization.
    • The TCCW demonstrates a high quality factor and superior robustness compared to CCCW.
    • The 2D photonic crystal platform enables efficient light confinement and manipulation.

    Conclusions:

    • The TCCW based on topological states provides a promising platform for advanced photonic functionalities.
    • This research paves the way for high-performance integrated photonic devices like logic gates, lasers, and filters.