Influence of disorder on a Bragg microcavityстатья
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Дата последнего поиска статьи во внешних источниках: 12 мая 2021 г.
Аннотация:Using the resonant-state expansion for leaky optical modes of a planar Braggmicrocavity, we investigate the influence of disorder on its fundamental cavity mode. We model the disorder by randomly varying the thickness of the Bragg-pair slabs (composing the mirrors) and the cavity, and calculate the resonant energy and linewidth of each disordered microcavity exactly, comparing the results with the resonant-state expansion for a large basis set and within its 1st and 2nd orders of perturbation theory. We show that random shifts of interfaces cause a growth of the inhomogeneous broadening of the fundamental mode that is proportional tothe magnitude of disorder. Simultaneously, the quality factor of the microcavity decreasesinversely proportional to the square of the magnitude of disorder. We also find that 1st order perturbation theory works very accurately up to a reasonably large disorder magnitude, especially for calculating the resonance energy, which allows us to derive qualitatively the scaling of themicrocavity properties with disorder strength.