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Videos de Conceptos Relacionados

Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

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Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
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Concept of Resonance and its Characteristics01:19

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If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
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Sound Waves: Resonance01:14

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Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
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Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

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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:
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Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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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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Parallel Resonance01:23

Parallel Resonance

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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:
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Updated: Jan 8, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
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Método de modelado para resonadores de anillos concéntricos con ingeniería de dispersión

Mehedi Hasan, Seungyup Baek, Ayrton Bernussi

    Optics express
    |December 19, 2025
    PubMed
    Resumen
    Este resumen es generado por máquina.

    Desarrollamos un método guiado por geometría para diseñar resonadores de anillos concéntricos para la ingeniería de dispersión. Este enfoque permite la creación de dispositivos que soportan solitones brillantes, avanzando en la fotónica no lineal integrada.

    Palabras clave:
    fotónica integradaóptica no linealresonadores de anillos concéntricosingeniería de dispersiónsolitones brillantesnitruro de silicio

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    Área de la Ciencia:

    • Fotónica integrada
    • Óptica no lineal
    • Ciencia de materiales (Nitruro de silicio)

    Sus antecedentes:

    • Los resonadores de anillos concéntricos son clave para los dispositivos fotónicos integrados.
    • La ingeniería de dispersión es crucial para controlar la propagación de la luz y los efectos no lineales.
    • Los modos débilmente guiados en los resonadores convencionales típicamente exhiben dispersión normal.

    Objetivo del estudio:

    • Introducir un método de diseño guiado por geometría para la ingeniería de dispersión en resonadores de anillos concéntricos.
    • Identificar geometrías en fase de forma eficiente utilizando un novedoso mapa OPL.
    • Diseñar un resonador de anillos concéntricos de nitruro de silicio capaz de soportar dispersión anómala y solitones brillantes.

    Principales métodos:

    • Simulaciones de modos propios de anillos simples para construir un mapa 2D de longitud de trayectoria óptica (OPL) de ida y vuelta.
    • Identificación sistemática de geometrías en fase y condiciones de acoplamiento.
    • Simulaciones de la ecuación de Lugiato-Lefever (LLE) para verificar la formación de solitones.

    Principales resultados:

    • Desarrollamos un mapa 2D de longitud de trayectoria óptica (OPL) para la identificación eficiente de combinaciones factibles de anillos y huecos.
    • Diseñamos un resonador de anillos concéntricos de Si3N4 de 50 nm de espesor que exhibe dispersión anómala en un modo débilmente guiado.
    • Confirmamos el soporte de un solitón brillante en el modo de ingeniería de dispersión a través de simulaciones LLE.

    Conclusiones:

    • El método del mapa OPL guiado por geometría agiliza el diseño de resonadores de anillos concéntricos para la ingeniería de dispersión.
    • La dispersión anómala y la formación de solitones brillantes son alcanzables en modos débilmente guiados de resonadores de anillos concéntricos diseñados.
    • El método propuesto es versátil y aplicable a diversos materiales y longitudes de onda para la fotónica no lineal integrada.