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Related Experiment Video

Updated: Jun 21, 2026

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

Robust adiabatic sum frequency conversion.

Haim Suchowski¹, Vaibhav Prabhudesai, Dan Oron

¹Physics of Complex System, Weizmann Institute of Science, Rehovot, 76100, Israel.

|August 6, 2009

Summary

This summary is machine-generated.

This study demonstrates a robust adiabatic sum frequency conversion method for achieving broad bandwidth frequency conversion. The technique shows resilience to parameter variations, enabling tunable wavelength output.

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The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

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Area of Science:

Nonlinear optics
Quantum optics
Laser physics

Background:

Sum frequency generation (SFG) is a nonlinear optical process.
Conventional SFG methods have limitations in bandwidth and robustness.
Robust population transfer schemes exist in atomic physics and NMR.

Purpose of the Study:

To theoretically and experimentally investigate the robustness of adiabatic sum frequency conversion.
To demonstrate a method for achieving significantly wider bandwidths than conventional techniques.
To explore the tunability of the generated wavelengths.

Main Methods:

Theoretical analysis using Landau-Zener theory for adiabatic transitions.
Experimental demonstration of the adiabatic sum frequency conversion technique.
Systematic variation of nonlinear crystal and incoming light parameters.

Main Results:

Achieved nearly full frequency conversion over bandwidths two orders of magnitude wider than conventional methods.
Demonstrated robustness to variations in crystal temperature, frequency, pump intensity, crystal length, and angle of incidence.
Showcased tunability of the broad bandwidth to higher or lower central wavelengths.

Conclusions:

The adiabatic sum frequency conversion method offers superior robustness and bandwidth.
This technique is adaptable for various nonlinear optical applications requiring broad spectral ranges.
The Landau-Zener theory provides a strong theoretical framework for understanding the process.