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Ultra-broadband achromatic imaging with diffractive photon sieves.

Xiaonan Zhao^1,2, Jingpei Hu^1,2, Yu Lin^1,2

¹College of Physics, Optoelectronics and Energy &Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.

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|June 23, 2016

Summary

This study introduces wavefront coded diffractive photon sieves for broadband achromatic imaging, overcoming chromatic aberration limitations. These novel elements enable significantly wider working bandwidths for optical imaging applications.

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Area of Science:

Optics
Optical Engineering
Nanotechnology

Background:

Diffractive optical elements (DOEs) exhibit significant chromatic aberration, limiting their use to single wavelengths.
This wavelength dependency restricts the application of DOEs in broadband imaging systems.

Purpose of the Study:

To demonstrate broadband achromatic imaging using wavefront coded diffractive photon sieves.
To overcome the chromatic aberration inherent in conventional diffractive optical elements.

Main Methods:

Fabrication of a wavefront coded photon sieve using UV-lithography.
Implementation of a wavefront coded pinhole pattern for broadband focusing.
Experimental validation of achromatic imaging performance.

Main Results:

The developed wavefront coded photon sieves achieved a working bandwidth of 28 nm, a substantial improvement over the 0.32 nm of conventional elements.
Demonstrated achromatic imaging with a bandwidth of 300 nm by integrating the element with a refractive component.

Conclusions:

Wavefront coded diffractive photon sieves offer a viable solution for broadband achromatic imaging.
This technology significantly expands the application scope of diffractive optical elements in imaging systems.