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

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Spin-orbit microlaser emitting in a four-dimensional Hilbert space.

Zhifeng Zhang^1,2, Haoqi Zhao², Shuang Wu¹

¹Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, USA.

|November 17, 2022

Summary

This summary is machine-generated.

Researchers developed a novel spin-orbit microlaser capable of generating and manipulating high-dimensional superposition states on a chip. This breakthrough advances on-chip information technologies for next-generation communication and computing.

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Area of Science:

Quantum optics
Photonics
Information technology

Background:

Current on-chip information technologies are limited to two-level systems, hindering the development of high-capacity, noise-resilient systems.
Achieving higher dimensional information spaces requires reconfigurable systems with more degrees of freedom, which are challenging to implement.
Existing vector lasers and microcavities struggle with the on-demand tuning of diversified, high-dimensional superposition states.

Purpose of the Study:

To demonstrate a chip-scale microlaser for flexible generation and manipulation of arbitrary four-level states.
To overcome the limitations of two-level systems in on-chip photonic technologies.
To enable the creation of complex, high-dimensional superposition states for advanced computing and communication.

Main Methods:

Designed coupled microcavities with a non-Hermitian synthetic gauge field.
Utilized spin-orbit coupling to generate light states with six degrees of freedom.
Mapped the vectorial states onto a Bloch hypersphere with SU(4) symmetry.

Main Results:

Successfully demonstrated a hyperdimensional, spin-orbit microlaser.
Achieved dynamical generation and reconfiguration of high-dimensional superposition states with high fidelity.
Showcased the ability to manipulate arbitrary four-level states on a chip.

Conclusions:

This work represents a significant step towards next-generation communication and computing technologies.
The developed microlaser offers a reconfigurable platform for exploring complex quantum states.
Enables flexible on-demand control of high-dimensional photonic states for future integrated photonic systems.