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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:

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Related Experiment Video

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Fabrication and Characterization of Superconducting Resonators
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Fabrication and Characterization of Superconducting Resonators

Published on: May 21, 2016

On-chip waveguide resonator with metallic mirrors.

Steve Zamek1, Amit Mizrahi, Liang Feng

  • 1Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla,California 92093, USA. szamek@ucsd.edu

Optics Letters
|February 18, 2010
PubMed
Summary
This summary is machine-generated.

We developed a silicon-on-insulator optical microresonator for label-free biochemical sensing. This device achieves high sensitivity, enabling the detection of subnanometer molecular layers on its surface.

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Area of Science:

  • Photonics and optical engineering
  • Materials science
  • Biochemical sensing technologies

Background:

  • Optical microresonators are crucial for sensitive detection.
  • Silicon-on-insulator platforms offer advantages for integrated photonics.
  • Label-free sensing is desirable for high-throughput biochemical analysis.

Purpose of the Study:

  • To introduce and characterize a novel optical microresonator.
  • To investigate its potential for label-free biochemical sensing.
  • To optimize the device for enhanced surface sensitivity.

Main Methods:

  • Fabrication of a planar waveguide microresonator on a silicon-on-insulator platform.
  • Theoretical analysis of optical performance.
  • Experimental investigation of quality factor and free-spectral range.
  • Surface sensitivity optimization for molecular detection.

Main Results:

  • Demonstrated a microresonator with dimensions 200 µm x 40 µm.
  • Achieved a quality factor of approximately 1000.
  • Measured a free-spectral range of approximately 8 nm.
  • Optimized device achieved subnanometer layer detection sensitivity.

Conclusions:

  • The developed optical microresonator shows promise for high-throughput, label-free biochemical sensing.
  • The device's performance is suitable for detecting minute molecular adsorption.
  • Further optimization can enhance its application in biosensing.