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Related Concept Videos

Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

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Related Experiment Video

Updated: Jun 22, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

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Published on: November 30, 2012

High confinement in silicon slot waveguides with sharp bends.

P Andrew Anderson, Bradley S Schmidt, Michal Lipson

    Optics Express
    |June 17, 2009
    PubMed
    Summary

    Researchers developed asymmetric slot waveguides to maintain high optical confinement in sharp bends. This design localizes light within the slot, crucial for compact photonic integrated circuits.

    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Waveguide Design

    Background:

    • Slot waveguides offer strong optical confinement in planar structures.
    • Maintaining this confinement in sharp bends is challenging for integrated photonic devices.

    Purpose of the Study:

    • To demonstrate a method for preserving high optical confinement in sharp bends of slot waveguides.
    • To investigate the use of asymmetric slot structures for mode localization.

    Main Methods:

    • Simulated light propagation in asymmetric slot waveguide structures with sharp bends.
    • Analyzed mode confinement and power distribution within the slot region.

    Main Results:

    • Achieved high optical confinement in slot waveguides with a 1 µm radius bend.

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    Last Updated: Jun 22, 2026

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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  • Demonstrated that an asymmetric slot design localizes the optical mode within the slot.
  • Showed relative power inside the slot can reach up to 28% in air-clad silicon waveguides.

    • Conclusions:

    • Asymmetric slot waveguide structures are effective for maintaining high optical confinement in sharp bends.
    • This approach enables the design of more compact and efficient integrated photonic circuits.