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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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:
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

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

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Published on: April 4, 2016

Dynamic shift effect on bistability in nonlinear optical microcavities.

Xu-Sheng Lin, Quan Shi, Xu-Hong Cai

    Optics Express
    |June 12, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Optical cavity modes shift due to nonlinear refractive index changes. A new time-average method reveals this dynamic shift impacts optical bistability, predicting transmission decrease with frequency detuning.

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    Area of Science:

    • Nonlinear optics
    • Cavity optomechanics

    Background:

    • Kerr nonlinearity causes a time-varying refractive index, leading to optical cavity mode shifts.
    • Optical bistability is a key phenomenon in nonlinear optical systems.

    Purpose of the Study:

    • To investigate the impact of dynamic optical cavity mode shifts on optical bistability.
    • To develop a theoretical model accounting for the time-varying refractive index under Kerr nonlinearity.

    Main Methods:

    • A novel time-average approach was developed to incorporate dynamic shift characteristics.
    • Nonlinear transmission expressions were derived using the time-average method.
    • Finite-difference time-domain (FDTD) simulations were employed for analysis.

    Main Results:

    • The study predicts a monotonous decrease in maximum transmission as frequency detuning increases.
    • The frequency detuning required to initiate bistability was corrected to approximately 2.
    • The time-average approach accurately models the observed phenomena.

    Conclusions:

    • The dynamic shift of optical cavity modes significantly influences optical bistability.
    • The developed time-average method provides a more accurate prediction of nonlinear transmission and bistability thresholds.
    • Accurate modeling of these effects is crucial for designing advanced optical devices.