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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

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Polychromatic optical Bloch oscillations.

Stefano Longhi¹

¹Dipartimento di Fisica, Politecnico di Milano, Milano, Italy. longhi@fisi.polimi.it

|October 14, 2009

Summary

This summary is machine-generated.

Restoring self-imaging and Bloch oscillations (BOs) in curved optical waveguide arrays is achieved by adding phase slips. This method allows for approximate BOs across broad spectral ranges, overcoming wavelength-dependent smearing.

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Area of Science:

Optics and Photonics
Waveguide Array Physics

Background:

Bloch oscillations (BOs) in optical waveguide arrays are sensitive to polychromatic light, leading to smearing due to wavelength-dependent spatial periods.
Circularly curved waveguide arrays exhibit unique behaviors but are susceptible to spectral dispersion effects.

Purpose of the Study:

To investigate methods for restoring self-imaging and achieving approximate Bloch oscillations (BOs) in polychromatic light within circularly curved optical waveguide arrays.
To mitigate the smearing of BOs caused by wavelength dependence.

Main Methods:

Theoretical analysis and numerical simulations of light propagation in circularly curved waveguide arrays.
Introduction of lumped phase slips uniformly applied across the array to counteract spectral dispersion.

Main Results:

Demonstrated that uniform lumped phase slips can restore the self-imaging property of the waveguide array.
Showcased the achievement of approximate Bloch oscillations (BOs) over relatively broad spectral ranges despite the inherent wavelength dependence.

Conclusions:

Lumped phase slips offer an effective strategy to preserve self-imaging and enable robust Bloch oscillations in polychromatic light within curved optical waveguide arrays.
This technique provides a pathway for controlling light propagation and achieving stable optical phenomena in complex waveguide structures.