High-Quality Confinement of Visible Light in Disordered Photonic Crystal Waveguides in the Anderson-Localized Regime

Abstract

Abstract:We demonstrate Anderson localization of visible light in silicon nitride photonic crystal waveguides. We measure photoluminescence resonances due to disorder-induced light localization showing quality factors of ≈10 000 that exceed engineered 2D photonic crystal cavities.

Anderson Localization Enabled Spectrally Stable Deep-Ultraviolet Laser Based on Metallic Nanoparticle Decorated AlGaN Multiple Quantum Wells

“…Nonetheless, there are several reports indicating the existence of localized modes in random waveguides interpreted in terms of Anderson localization. − The defining characteristic of this type of random laser is spectral stability, which means that it produces lasers of certain wavelengths but not lasers of random wavelengths. This feature provides random lasers with a greater advantage for practical applications. − However, the demonstrated Anderson localization random lasers are only restricted to some specific wavelengths, and the related reports are rather limited. Evidently, to fully understand the underlying physics of Anderson localization of a light beam traveling in a random medium and explore its potential application, a more detailed study on a wider spectral range is greatly desired.…”

Free-standing silicon nitride nanobeams with efficient fiber-chip interface for cavity QED

“…In this framework, Silicon nitride offers many advantages over other alternative materials, mostly due to its wide band gap and compatibility with standard CMOS processes. In visible wavelengths, however, the moderately low index of refraction has limited the quality factor of PhC cavities on Si 3 N 4 films to only 3 orders of magnitude in visible wavelengths [15][16][17][18][19] . In this report, we demonstrate nanobeam PhC cavities with a quality factor of ∼ 24, 000, that is 1 order of magnitude higher than previously reported.…”