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Intense ultra-broadband down-conversion from randomly poled nonlinear crystals.

Jirí Svozilík¹, Jan Perina

¹Palacký University, Institute of Physics of Academy of Science of the Czech Republic, Olomouc, Czech Republic.

|January 4, 2011

Summary

Randomly poled nonlinear crystals generate intense ultra-broadband photon pairs, matching chirped crystals. Their intensity scales with domain number, enabling single-cycle photon pair generation.

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Area of Science:

Nonlinear optics
Quantum optics
Materials science

Background:

Chirped periodically-poled crystals are standard for generating broadband photon pairs.
Understanding alternative materials for photon pair generation is crucial for quantum technologies.

Purpose of the Study:

To investigate the potential of randomly poled nonlinear crystals for generating ultra-broadband photon-pair fields.
To compare their performance against established chirped periodically-poled crystals.

Main Methods:

Utilizing randomly poled nonlinear crystals.
Analyzing the properties of emitted photon-pair fields.
Investigating the scaling of intensity with the number of domains.

Main Results:

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Randomly poled crystals emit intense ultra-broadband photon-pair fields.
The generated fields exhibit properties comparable to those from chirped periodically-poled crystals.
Photon pair intensities scale linearly with the number of domains.
Generation of photon pairs with durations comparable to a single optical cycle is demonstrated.

Conclusions:

Randomly poled nonlinear crystals offer a viable and efficient alternative for generating high-quality photon pairs.
The linear scaling of intensity provides a pathway for controlled generation of photon pair fields.
These findings open new avenues for applications in quantum information and spectroscopy.