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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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Published on: January 3, 2016

Path length modulation technique for scatter noise immunity in squeezing measurements.

Andrew R Wade¹, Sheon S Y Chua, Michael S Stefszky

¹Department of Quantum Science, Australian National University, Acton, Canberra, ACT 0200, Australia. andrew.wade@anu.edu.au

|July 2, 2013

Summary

We developed a frequency shifting technique to eliminate scattering noise in squeezed light. This method preserves quantum squeezing and reduces noise by up to 20 dB without optical loss.

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Area of Science:

Quantum optics
Laser physics
Metrology

Background:

Scattering-induced noise degrades the performance of squeezed light states.
Maintaining the integrity of squeezed states is crucial for precision measurements.

Purpose of the Study:

To present a novel technique for mitigating scattering-induced noise in squeezed light.
To demonstrate noise reduction while preserving quantum squeezing.

Main Methods:

Implementing a 500 Hz path length modulation in pre- and post-squeezing apparatus.
Utilizing frequency shifting to distinguish and remove scattered light noise.

Main Results:

Achieved up to a 20 dB reduction in scattering-induced noise.
Successfully recovered squeezing measurements below the shot noise limit.
Demonstrated immunity to spurious scattering sources.

Conclusions:

The frequency shifting technique effectively suppresses scattering noise.
This method preserves valuable squeezed states without introducing optical losses.
Offers a robust solution for enhancing precision in quantum optical experiments.