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Updated: Jun 12, 2026
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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
Published on: August 29, 2017
Summary
Ultrafine gold and silver particulate films exhibit low reflectivity and high absorption. Laser irradiation drastically alters their optical properties, enabling applications in optical recording and photography.
Area of Science:
- Materials Science
- Nanotechnology
- Optical Engineering
Background:
- Particulate films composed of ultrafine gold (Au) or silver (Ag) particles (8-20 nm) were fabricated.
- These films possess low packing density, resulting in low reflectivity (<3%) and high absorption across 300-1000 nm.
Purpose of the Study:
- To investigate the optical properties of ultrafine particulate films.
- To explore their potential for optical recording and photographic applications.
Main Methods:
- Gas evaporation technique was employed to prepare particulate films.
- Optical properties were characterized, and the effect of laser irradiation was studied.
Main Results:
- Films exhibited very low reflectivity (<3%) due to low particle packing density.
- A low sintering temperature (~350°C for Au) allows for significant optical property changes upon laser irradiation.
- A two-layer configuration (reflector + ~0.5-microm particulate Au film) demonstrated adjustable reflectivity for optical recording.
Conclusions:
- Ultrafine particulate Au and Ag films possess unique optical properties suitable for advanced applications.
- Laser-induced modification of optical properties opens avenues for sensitive optical recording media.
- These materials show promise for photographic applications.
