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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Optical pulling force and conveyor belt effect in resonator-waveguide system.

Varat Intaraprasonk¹, Shanhui Fan

¹Department of Applied Physics, Stanford University, Stanford, California 94305, USA.

|August 31, 2013

Summary

This summary is machine-generated.

Researchers demonstrate an optical pulling force in resonator-waveguide systems, where light pushes objects backward. This effect can stabilize resonators near waveguides, enabling new optical manipulation techniques.

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Area of Science:

Optics and Photonics
Nanotechnology
Optical Forces

Background:

Optical forces are typically associated with radiation pressure pushing objects in the direction of light propagation.
Controlling optical forces is crucial for applications in optical trapping, manipulation, and micro-assembly.
Resonator-waveguide systems offer a platform for strong light-matter interactions.

Purpose of the Study:

To theoretically establish and numerically design conditions for achieving an optical pulling force.
To investigate the simultaneous occurrence of optical pulling force and lateral optical equilibrium.
To explore the potential of resonator-waveguide systems for novel optical manipulation.

Main Methods:

Theoretical analysis of light-matter interaction in resonator-waveguide systems.
Numerical simulations to design and verify the optical pulling force.
Modeling of coupled optical modes and their momentum transfer.

Main Results:

Demonstrated a configuration where the optical force on a resonator is opposite to the input light direction (pulling force).
Showcased the concurrent effect of lateral optical equilibrium, maintaining resonator-waveguide distance.
Validated the theoretical predictions through numerical simulations.

Conclusions:

Optical pulling force is achievable in specific resonator-waveguide configurations.
This force can be combined with lateral stability for precise optical control.
The findings pave the way for advanced optical tweezers and integrated photonic devices.