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High order diffraction grating using v-shaped groove with refractive and reflective surfaces.
Do-Kyun Woo1, Kazuhiro Hane, Sun-Kyu Lee
1Department of Mechatronics, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea.
Optics Express
|December 10, 2008
Summary
A novel v-shaped groove transmission grating achieves high diffraction orders. This diffractive grating demonstrates strong -4th and -10th transmission orders at visible wavelengths, advancing optical applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Diffractive gratings are crucial optical components.
- Achieving high diffraction orders efficiently remains a challenge.
Purpose of the Study:
- To propose and characterize a novel v-shaped groove transmission grating with reflective and refractive surfaces (VGRRS).
- To demonstrate the VGRRS's capability for high diffraction orders at visible wavelengths.
Main Methods:
- Rigorous coupled-Wave analysis (RCWA) for TE mode simulation.
- Fabrication via thermal evaporation on a hot-embossed replica using a v-shaped groove mold.
Main Results:
- The VGRRS design enables high diffraction orders.
- At 406 nm, strong diffracted light was observed in the -4th and -10th transmission orders.
Conclusions:
- The VGRRS is a promising diffractive grating for achieving high diffraction orders.
- This technology has potential applications in visible light manipulation and optical systems.
