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Related Experiment Video

Updated: Jul 4, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Sapphire-GaN-based planar integrated free-space optical system.

M Hofmann1, S Hauguth-Frank, V Lebedev

  • 1Institute of Micro- and Nanotechnologies, Optical Engineering, Technical University Ilmenau, Ilmenau, Germany.

Applied Optics
|June 3, 2008
PubMed
Summary
This summary is machine-generated.

This study presents a novel planar integrated free-space optical system using binary phase diffractive optical elements (DOEs) fabricated on Gallium Nitride (GaN) on sapphire substrates, enabling monolithic integration of optical and electronic components.

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Area of Science:

  • Optoelectronics
  • Nanotechnology
  • Photonics

Background:

  • Group III-nitride/sapphire substrates facilitate monolithic integration of microoptical and optoelectronic devices.
  • Diffractive optical elements (DOEs) are key components in integrated optical systems.

Purpose of the Study:

  • To design and fabricate a planar integrated free-space optical system.
  • To demonstrate the capability of GaN on sapphire for integrating passive microoptics with active optoelectronic devices.
  • To develop a method for simultaneous optimization of transmissive and reflective DOEs.

Main Methods:

  • Fabrication of binary phase diffractive optical elements (DOEs) using lithography and etching on GaN/sapphire substrates.
  • Design of a planar integrated free-space optical system.
  • Simultaneous optimization of DOE efficiency for both transmissive and reflective configurations.

Main Results:

  • Successful fabrication of a planar integrated free-space optical system.
  • Demonstration of monolithic integration of microoptical elements (lenses, gratings) on GaN/sapphire.
  • Achieved simultaneous optimization of efficiency for transmissive and reflective DOEs within a single fabrication step.

Conclusions:

  • GaN on sapphire is a suitable platform for monolithic integration of advanced optical and electronic functionalities.
  • The presented approach enables efficient fabrication of complex diffractive optical elements for integrated free-space optics.
  • This technology paves the way for compact and versatile optoelectronic systems.