Spectral resolved dynamic localization in curved fs laser written waveguide arrays

Area of Science:

• Optics and Photonics
• Materials Science
• Laser Physics

Background:

• Femtosecond laser writing enables precise fabrication of optical waveguide arrays.
• Dynamic localization describes how light can become confined within such arrays.
• Understanding light propagation in complex waveguide structures is crucial for optical device development.

Purpose of the Study:

• To investigate dynamic localization phenomena in curved femtosecond laser-written waveguide arrays.
• To directly observe light propagation within these waveguide arrays.
• To analyze the spectral response of the waveguide arrays to different excitation wavelengths.

Main Methods:

• Fabrication of curved waveguide arrays using femtosecond laser writing.
• Direct observation of light propagation via fluorescence monitoring of induced color centers.
• Spectral response characterization using white light supercontinuum excitation.

Main Results:

• Demonstrated direct observation of light propagation dynamics within the waveguide array.
• Observed unique spectral responses of the curved waveguide arrays.
• Provided insights into light localization phenomena in non-linear optical systems.

Conclusions:

• Femtosecond laser-written waveguide arrays exhibit dynamic localization effects.
• Fluorescence monitoring is an effective technique for studying light propagation in such structures.
• The spectral response is sensitive to the array geometry and excitation wavelength.