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A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

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Published on: May 30, 2016

Frequency conversion of structured light.

Fabian Steinlechner^1,2, Nathaniel Hermosa^1,3, Valerio Pruneri^1,4

¹ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Spain.

Scientific Reports

|February 16, 2016

Summary

This summary is machine-generated.

Researchers achieved coherent frequency conversion of structured light, transforming near-infrared to visible light while preserving its spatial properties. This breakthrough advances quantum information processing and coherent imaging applications.

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Area of Science:

Photonics
Quantum Optics
Nonlinear Optics

Background:

Coherent frequency conversion preserves the spatial properties of light.
Structured light, including orbital angular momentum modes, has applications in nano-optics and quantum networks.

Purpose of the Study:

To demonstrate coherent frequency conversion of structured light from near-infrared to visible wavelengths.
To verify the preservation of spatial information during the conversion process.

Main Methods:

Sum-frequency generation in a periodically poled lithium niobate crystal.
Pumping the crystal with a 1540-nm Gaussian beam to convert 803-nm light to 527-nm light.
Mode projection measurements using a phase mask and single-mode fiber to confirm coherence.

Main Results:

Successful frequency conversion from 803 nm (near-infrared) to 527 nm (visible).
Frequency-converted light exhibited high similarity to the input structured light field.
Coherence of the conversion process was verified through mode projection.

Conclusions:

The demonstrated technique is suitable for coherent frequency conversion of structured light.
This method has potential applications in quantum information processing and coherent imaging.
Preserving spatial information during frequency conversion is key for advanced photonic applications.