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Cost-effective large-scale fabrication of diffractive optical elements by using conventional semiconducting

Seunghwan Yoo1, Ho Young Song, Junghoon Lee

  • 1Energy Efficiency Department, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, South Korea.

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Summary

We developed a cost-effective method to mass-produce thin diffractive optical elements (DOEs) using semiconductor industry techniques. This innovation enables the creation of high-brightness light-emitting diode (LED) modules.

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Area of Science:

  • Optics
  • Materials Science
  • Nanotechnology

Background:

  • Diffractive optical elements (DOEs) are crucial for manipulating light.
  • Existing fabrication methods for thin DOEs can be complex and costly.
  • Silicon dioxide (SiO(2)) is a suitable material for optical applications due to its properties.

Purpose of the Study:

  • To introduce a simple, cost-effective fabrication method for SiO(2)-based thin diffractive optical elements (DOEs).
  • To demonstrate the applicability of conventional semiconductor industry processes for DOE fabrication.
  • To enable mass production of DOEs for enhanced optical devices.

Main Methods:

  • Utilized photolithography and inductively coupled plasma etching.
  • Fabricated sub-nanometer scale, thin DOEs with a refractive index of 1.45.
  • Employed standard semiconductor fabrication processes for ease of integration and scalability.

Main Results:

  • Successfully fabricated SiO(2)-based thin DOEs using the described methods.
  • Confirmed the precise shaping of output light from laser diode sources.
  • Demonstrated the effective application of fabricated DOEs in a light-emitting diode (LED) module.

Conclusions:

  • The developed method offers a simple and cost-effective approach for mass-producing thin DOEs.
  • This technique facilitates the realization of high-brightness LED modules.
  • The integration of conventional semiconductor processes simplifies DOE manufacturing.