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Related Concept Videos

Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...

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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Published on: May 29, 2014

Optical nonreciprocity in optomechanical structures.

Sasikanth Manipatruni1, Jacob T Robinson, Michal Lipson

  • 1School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA.

Physical Review Letters
|June 13, 2009
PubMed
Summary
This summary is machine-generated.

Optomechanical devices show nonreciprocal behavior through light-matter momentum exchange. A microscale device demonstrates high/low transparency states with over 20 dB extinction, enabling directional light control.

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Area of Science:

  • Optomechanics
  • Photonics
  • Nanotechnology

Background:

  • Optomechanical systems couple light and mechanical motion.
  • Nonreciprocity is crucial for optical isolation and signal processing.
  • Existing nonreciprocal devices often require complex designs or extreme conditions.

Purpose of the Study:

  • To demonstrate nonreciprocal behavior in optomechanical devices.
  • To propose a practical microscale optomechanical device for nonreciprocity.
  • To achieve high extinction ratios for directional light control.

Main Methods:

  • Utilizing linear momentum exchange between light and a mechanical structure.
  • Designing a microphotonic platform for optomechanical interaction.
  • Operating the device at room temperature.

Main Results:

  • Optomechanical devices exhibit nonreciprocal behavior.
  • A microscale device achieves switching between high and low transparency states.
  • An extinction ratio exceeding 20 dB is demonstrated.

Conclusions:

  • Linear momentum exchange is a viable mechanism for optomechanical nonreciprocity.
  • The proposed microscale device offers a practical platform for nonreciprocal optics.
  • The demonstrated high extinction ratio enables efficient directional light control.