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Metasurface-stabilized optical microcavities.

Marcus Ossiander1, Maryna Leonidivna Meretska2, Sarah Rourke2,3

  • 1John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA. mossiander@g.harvard.edu.

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Summary
This summary is machine-generated.

We developed stable optical microcavities using amorphous silicon metasurfaces. This breakthrough enables enhanced light-matter interactions in compact devices for advanced applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Optical microcavities concentrate light for enhanced light-matter interactions.
  • Miniaturizing cavities is crucial for applications but limits design flexibility.
  • Existing microcavity designs face challenges with stability and mode control.

Purpose of the Study:

  • To demonstrate stable optical microcavities using amorphous silicon metasurfaces.
  • To overcome design constraints in microscopic optical cavities.
  • To introduce nanoscopic light control into cavity electrodynamics.

Main Methods:

  • Utilized amorphous silicon metasurfaces as cavity end mirrors to counteract phase evolution.
  • Incorporated distributed Bragg reflectors for high reflectivity.
  • Minimized metasurface scattering losses to below 2% at telecom wavelengths.

Main Results:

  • Achieved stable telecom-wavelength microcavities with quality factors up to 4600.
  • Demonstrated spectral resonance linewidths below 0.4 nm.
  • Obtained mode volumes below [Formula: see text].

Conclusions:

  • Amorphous silicon metasurfaces enable stable microcavity designs with unprecedented freedom.
  • This approach allows for arbitrary transverse intensity profiles and cavity-enhanced hologram modes.
  • The method is industrially scalable using semiconductor manufacturing, integrating metasurface capabilities into cavity electrodynamics.