Synthesis of nano-optical elements for zero-order diffraction 3D imaging.

Area of Science:

• Optics and Photonics
• Nanotechnology
• Materials Science

Background:

• Nano-optical elements are crucial for advanced imaging and security.
• Current methods for synthesizing these elements face limitations in complexity and precision.
• Multilevel structures are essential for advanced nano-optical element functionality.

Purpose of the Study:

• To propose a novel method for computing and synthesizing nano-optical elements.
• To develop a new technique for calculating the phase function of multilevel nano-optical elements.
• To create advanced optical security elements with unique 3D imaging capabilities.

Main Methods:

• Development of a new computational method for nano-optical element phase function synthesis.
• Utilizing electron-beam lithography for the precise fabrication of multilevel microrelief structures.
• Achieving high accuracy in microrelief formation with 10 nm depth precision.

Main Results:

• Successful synthesis of novel nano-optical elements capable of forming 3D images with full parallax.
• Demonstration of a new security feature at the zero order of diffraction.
• Fabrication of a sample optical security element exhibiting a distinct 3D visual effect under white light illumination.

Conclusions:

• The developed method enables the creation of advanced nano-optical elements for 3D imaging.
• The synthesized optical security elements offer robust, visually verifiable anti-counterfeiting protection.
• These elements are compatible with existing security hologram manufacturing equipment, facilitating widespread adoption.