Spatial steadiness of individual disorder modes upon controlled spectral tuning
Year: 2016
Authors: Caselli N., Riboli F., Intonti F., La China F., Biccari F., Gerardino A., Gurioli M.
Autors Affiliation: European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; Univ Florence, Dept Phys, Via Sansone 1, I-50019 Sesto Fiorentino, FI, Italy; Univ Trento, Dept Phys, Via Sommar 14, I-38123 Povo, TN, Italy; CNR, Inst Photon & Nanotechnol, I-00156 Rome, Italy.
Abstract: Recent innovative applications in disordered photonics would strongly benefit from the possibility to achieve spectral tuning of the individual disorder localized photonic modes without affecting their spatial distributions. Here, we design and fabricate a two-dimensional disordered photonic system, made of a GaAs slab patterned with randomly distributed circular air scattering centers, supporting localized light modes with very small modal volume. The photoluminescence of InAs quantum dots embedded in the slab is used as a probe for near field experiments and gives direct access to the electric field intensity distribution of the localized random modes. We demonstrate that laser assisted oxidation of the GaAs slab performed by near field illumination can be used for a gentle tuning of the individual random modes without modifying the subtle balance leading to light localization given by multiple scattering.
Journal/Review: APL PHOTONICS
Volume: 1 (4) Pages from: 41301-1 to: 41301-7
More Information: The authors deeply thank L. Balet, L. H. Li, and A. Fiore for contributing in the growth and fabrication process of the sample. This work was founded by the FET Project No. FP7 618025 CARTOON and by Starting Grant Project, Young Researchers 40600009, funded by Autonomous Province of Trento.KeyWords: Anderson Localization; Light; NanocavityDOI: 10.1063/1.4946852Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)