Haque, A.K.M. NaziulAhmed, TashfiqBaten Md Zunaid2026-07-302026-07-302021-11-22A. K. M. Naziul Haque, Tashfiq Ahmed, and Md Zunaid Baten, "In-plane directionality control of strongly localized resonant modes of light in disordered arrays of dielectric scatterers," Opt. Express 29, 39227-39240 (2021)109440872-s2.0-85118867597https://hdl.handle.net/10361/28721In this work we propose and analyze techniques of in-plane directionality control of strongly localized resonant modes of light in random arrays of dielectric scatterers. Based on reported diameters and areal densities of epitaxially grown self-organized nanowires, two dimensional (2D) arrays of dielectric scatterers have been analyzed where randomness is gradually increased along a preferred direction of directionality enhancement. In view of the multiple scattering mediated wave dynamics and directionality enhancement of light in such arrays, a more conveniently realizable, practical structure is proposed where a 2D periodic array is juxtaposed with a uniform, random scattering medium. Far- and near-field emission characteristics of such arrays show that in spite of the utter lack of periodicity in the disordered regime of the structure, directionality of the high-Q resonant modes is modified such that on average more than 70% of the output power is emitted along the pre-defined direction of preference. Such directionality enhancement and strong localization are nonexistent when the 2D periodic array is replaced with a one-dimensional Bragg reflector, thereby confirming the governing role of in-plane multiple scattering in the process. The techniques presented herein offer novel means of realizing not only directionality tunable edge-emitting random lasers but also numerous other disordered media based photonic structures and systems with higher degrees of control and tunability. © 2021 Optical Society of America.39227 - 39240en-UStrueAreal densitiesDielectric scatterersDisordered arraysEpitaxially grownLocalisedPeriodic arraysRandom arrayResonant modeSelf-organisedTwo dimensional (2D) arraysLight--Scattering.Dielectrics--Optical properties.Nanophotonics.Article10.1364/OE.443103