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The Power Superposition Principle

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Power splitters based on the light-intensity-dependent superprism effect.

Xiao-Jun Chen¹, Yi Xu, Sheng Lan

¹Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.

|September 12, 2008

Summary

This study demonstrates a novel two-stage power splitter using the nonlinear Kerr effect and superprism effect in photonic lattices. It achieves spatial separation and angular amplification of light beams based on their power densities.

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Area of Science:

Nonlinear optics
Photonic crystals
Wave propagation

Background:

The nonlinear Kerr effect influences light propagation in optical media.
Superprism effects in photonic lattices enable wavelength or angular separation of light.
Controlling light beam separation based on intensity is crucial for optical devices.

Purpose of the Study:

To realize power splitters utilizing the light-intensity-dependent superprism effect.
To investigate a two-stage system with rotated photonic lattices for enhanced beam separation.
To explore the nonlinear finite-difference time-domain method for simulating such systems.

Main Methods:

Utilizing the nonlinear Kerr effect in the background medium.
Implementing a two-stage system with two photonic lattices rotated by 16 degrees.
Applying the nonlinear finite-difference time-domain method for numerical simulations.

Main Results:

The first lattice spatially separates beams based on power density.
The second lattice acts as an angular amplifier, increasing separation to near 90 degrees for different power densities.
Local changes in refractive indices due to pumping power form interfaces that rotate the k-vector.

Conclusions:

A novel power splitter design based on the superprism effect and nonlinear Kerr effect is proposed.
The two-stage system effectively separates and amplifies angular separation of light beams by intensity.
The findings offer insights into controlling light propagation in nonlinear photonic structures.