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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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Nonlinear detour phase holography.

Bingxia Wang¹, Xuanmiao Hong¹, Kai Wang¹

¹Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China. kale_wong@hust.edu.cn lupeixiang@hust.edu.cn.

|January 26, 2021

Summary

This summary is machine-generated.

We introduce a new nonlinear detour phase method for wavefront manipulation in nonlinear photonic crystals. This technique simplifies fabrication using basic building blocks, enabling compact, multifunctional nonlinear micro-devices.

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Area of Science:

Photonics and optical engineering
Materials science
Nonlinear optics

Background:

Nonlinear photonic crystals offer efficient wavefront manipulation for integrated devices.
Current nonlinear encoding methods involve complex microstructures, posing fabrication challenges.

Purpose of the Study:

To propose and demonstrate a simplified nonlinear detour phase method for nonlinear photonic crystals.
To enable easier fabrication of nonlinear wavefront manipulation devices.

Main Methods:

Development of a nonlinear detour phase method.
Fabrication using femtosecond laser writing with basic building blocks.
Experimental demonstration of a second-harmonic hologram.

Main Results:

The proposed method utilizes simple, easily fabricated building blocks.
Successful demonstration of a nonlinear detour phase hologram.
Exploration of quasi-phase-matching for second-harmonic holographic imaging.

Conclusions:

The nonlinear detour phase method simplifies the design and fabrication of nonlinear photonic crystal devices.
This approach extends conventional detour phase methods to the nonlinear regime.
Opens new avenues for developing compact, multifunctional nonlinear micro-devices.