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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Published on: August 30, 2012

Surface periodic domain structures for waveguide applications.

Lyudmila S Kokhanchik1, Maxim V Borodin, Nikolay I Burimov

  • 1Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia. mlk@iptm.ru

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|June 20, 2012
PubMed
Summary

Researchers fabricated periodic domain structures on lithium niobate (LiNbO3) using electron beam irradiation. These structures are suitable for quasi-phase-matched frequency conversion in optical devices.

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Fabrication of Surface Acoustic Wave Devices on Lithium Niobate
07:55

Fabrication of Surface Acoustic Wave Devices on Lithium Niobate

Published on: June 18, 2020

Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Lithium niobate (LiNbO3) is a key material for nonlinear optical applications.
  • Fabricating periodic domain structures is crucial for achieving quasi-phase-matched (QPM) frequency conversion.
  • Electron beam irradiation offers a precise method for micro/nanofabrication.

Purpose of the Study:

  • To investigate the fabrication of surface periodic domain structures on LiNbO3 using electron beam irradiation.
  • To determine optimal fabrication conditions for creating domain gratings.
  • To assess the suitability of these structures for optical devices.

Main Methods:

  • Fabrication of periodic domain structures on Y- and X-cuts of LiNbO3, Ti:LiNbO3, and Zn:LiNbO3 using quasi-point electron beam irradiation.
  • Utilizing a 25-keV electron beam with doses ranging from 500 to 2000 μC/cm².
  • Characterization techniques to visualize domain structures, estimate uniformity, and measure second harmonic generation (SHG).

Main Results:

  • Successfully formed domain gratings with spatial periods between 4.75 and 7.25 μm.
  • Visualized the surface domain structures and assessed their uniformity.
  • Demonstrated waveguide generation of the second optical harmonic, confirming the functionality of the fabricated structures.

Conclusions:

  • Electron beam irradiation is an effective method for fabricating surface periodic domain structures on LiNbO3.
  • These structures are promising for quasi-phase-matched frequency conversion applications.
  • The developed technique enables the creation of compact optical devices, such as frequency-converted radiation sources.