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Updated: Jun 15, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Summary
A new experimental method precisely measures optical radiation irradiance needed for nonlinear processes by analyzing laser beam focus spatial dependence. This technique is exact for multiphoton events, offering accurate quantification in optical science.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- Accurate measurement of optical radiation irradiance is crucial for understanding and controlling nonlinear optical phenomena.
- Existing methods may lack precision or applicability across diverse nonlinear processes.
Purpose of the Study:
- To develop and present an experimental method for precisely measuring the irradiance of optical radiation.
- To determine the irradiance threshold for stimulating various nonlinear optical processes.
Main Methods:
- The method relies on analyzing the spatial dependence of a nonlinear process near a laser beam focus.
- Utilizes a laser operating in the lowest order transverse mode (e.g., TEM00).
- The theoretical treatment is exact for multiphoton processes under specific conditions (no relaxation or recombination).
Main Results:
- A robust experimental approach for quantifying nonlinear optical process thresholds has been established.
- The method provides a means to experimentally determine the irradiance required for specific nonlinear effects.
Conclusions:
- The developed method offers a precise and experimentally accessible way to measure optical irradiance for nonlinear processes.
- This technique is particularly valuable for multiphoton absorption studies and provides a foundation for investigating other nonlinear phenomena.
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