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Related Concept Videos

Mechanical Systems01:22

Mechanical Systems

Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically described...
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
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:
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...

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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Cavity opto-mechanics.

Tobias J Kippenberg, Kerry J Vahala

    Optics Express
    |June 25, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study explores how light pressure affects mechanical motion in microcavities. It details parametric instability for a new "photonic clock" and radiation pressure cooling for advanced quantum optomechanics.

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    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    Area of Science:

    • Quantum Optics
    • Optomechanics
    • Nanotechnology

    Background:

    • Radiation pressure coupling mechanical and optical properties is key in gravitational wave detection.
    • Recent experiments enable studying light's influence on mechanical dynamics.
    • Whispering-gallery microcavities confine light, leading to observable back-action effects.

    Purpose of the Study:

    • To review and unify the manifestations of radiation pressure back-action in microcavities.
    • To explore parametric instability as a light-driven 'photonic clock'.
    • To investigate radiation pressure cooling for quantum optomechanics applications.

    Main Methods:

    • Theoretical review of light-matter interactions in whispering-gallery microcavities.
    • Analysis of parametric instability and its potential for precise timing.
    • Investigation of radiation pressure cooling mechanisms and their efficiency.

    Main Results:

    • Unified treatment of parametric instability (mechanical amplification/oscillation) and cooling.
    • Demonstration of parametric instability as a novel, light-pressure-driven photonic clock.
    • Radiation pressure cooling achieving sub-unity phonon occupancies, surpassing cryogenic limits.

    Conclusions:

    • Radiation pressure in microcavities offers significant control over mechanical dynamics.
    • Parametric instability presents a new paradigm for high-precision timing.
    • Advanced cooling via radiation pressure paves the way for cavity quantum optomechanics.