Observation of optical coupling in microdisk resonators

Abstract

In this paper, optical properties of coupled silica disk microresonators are investigated. The spectral response and the light intensity distribution along the coupled disks were measured. It was found that the distribution depends on the particular excited resonance, which can be attributed to the formation of normal modes of the coupled resonator system. A developed theoretical model gives quantitative agreement with the experimental observations

Коллективные Моды В Сдвоенных Полупроводниковых Дисковых Лазерах На Модах Шепчущей Галереи

“…В таких системах резонаторы различной формы (диски, тороиды, кольца) непосред-ственно соединены или находятся друг от друга на таком расстоянии, которое обеспечивает оптическую связь между ними. Эти системы принято называть термином " photonic molecules", и им посвящено множе-ство работ [5,6]. Однако в подавляющем большинстве таких работ рассматриваются системы с оптической накачкой резонаторов, которые работают в терагерцо-вом или видимом диапазонах электромагнитного излу-чения.…”

Ab initiodescription of nonlinear dynamics of coupled microdisk resonators with application to self-trapping dynamics

“…In what follows we limit our consideration to the case of only two disks, which we will study in the so called resonant approximation [11]. This approximation implies that we only take into account coupling between degenerate phase-matched modes of the disks.…”

“…The resulting collective optical excitations in linear regime have been observed experimentally in coupled microspheres and micro-disks [9][10][11] and described theoretically within the framework of ab initio approaches [11][12][13][14]. At the same time, the nonlinear optics of coupled microresonators is still in its infancy.…”

“…In this approximation, disks' refractive index is replaced by an effective parameter, n d , determined from a self-consistency condition [33]. Two-dimensional approximation was also used to describe electromagnetic field of the planar system of several disks (optical molecules) using coupled integral equations [34,35] as well as modal expansion approach [11]. While the formulation in terms of integral equations is convenient for numerical simulations of planar structures, especially with non-circular elements, the modal expansion is more appropriate for developing ab initio theoretical description of nonlinear effects in WGM resonators.…”

“…19 to each disk of the structure and including in the term containing the incident field contributions from the fields scattered by all other disks [11]:…”