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Structured light engineering using a photonic nanojet.

Maryam Yousefi, Daniel Nečesal, Toralf Scharf

|July 30, 2021

Summary

This summary is machine-generated.

Researchers engineered light patterns using photonic nanojets generated by microlens arrays and spheroids. Different spheroid shapes controlled the nanojet

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Area of Science:

Optics and Photonics
Nanotechnology
Structured Light

Background:

Structured light generation is crucial for advanced optical applications.
Photonic nanojets offer unique light-field manipulation capabilities.

Purpose of the Study:

To investigate the generation and control of photonic nanojets using a microlens array system.
To engineer far-field light distribution by modifying photonic nanojet characteristics.

Main Methods:

Utilized a microlens array illuminated by a Gaussian beam to create structured light.
Introduced spheroids of varying aspect ratios to generate photonic nanojets.
Employed high-resolution interferometry for phase and intensity measurements.
Performed numerical simulations and experimental validation.

Main Results:

Demonstrated photonic nanojet generation by introducing spheroids into the Gaussian beam focus.
Showcased the ability to engineer far-field patterns via photonic nanojets.
Observed that spheroid geometry (prolate, sphere, oblate) influences nanojet properties.
Found that smaller nanojet width and higher divergence angle increase the field of view.

Conclusions:

Photonic nanojets generated by structured light systems can effectively engineer far-field light patterns.
Spheroid geometry provides a method to tune nanojet characteristics for tailored optical outputs.
This approach enables enhanced field of view for optical systems of fixed physical size.