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Related Concept Videos

Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

290
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
290
Parallel Resonance01:23

Parallel Resonance

239
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
239

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High-Q chalcogenide racetrack resonators based on the multimode waveguide.

Zhiyuan Wang, Zhen Yang, Haoxian Wang

    Applied Optics
    |May 3, 2023
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    We developed a high-quality factor racetrack resonator using multimode waveguides in chalcogenide glass. This design achieves a record 1.31×10^6 intrinsic Q factor, promising for efficient nonlinear photonics.

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    Area of Science:

    • Photonics
    • Materials Science
    • Optical Engineering

    Background:

    • High-quality factor (Q) resonators are crucial for nonlinear photonics.
    • Chalcogenide glass offers unique optical properties for integrated photonics.
    • Existing designs often face limitations in compactness and mode control.

    Purpose of the Study:

    • To propose and demonstrate a novel racetrack resonator with a high Q factor.
    • To utilize multimode waveguides and modified Euler curves for compact bends.
    • To enable efficient fundamental mode coupling for power-efficient nonlinear applications.

    Main Methods:

    • Design of multimode waveguide bends using modified Euler curves.
    • Implementation of a multimode straight waveguide directional coupler.
    • Fabrication of micro-racetrack resonators in high-index contrast chalcogenide glass film.

    Main Results:

    • Achieved a record-high intrinsic Q factor of 1.31×10^6 for selenide-based devices.
    • Demonstrated a low waveguide propagation loss of 0.38 dB/cm.
    • Successfully coupled the fundamental mode without exciting higher-order modes.

    Conclusions:

    • The proposed racetrack resonator design offers superior performance.
    • The compact design reduces chip footprint.
    • Potential for significant advancements in power-efficient nonlinear photonics.