Finite-difference time-domain simulations of exciton-polariton resonances in quantum-dot arrays

• The optical properties of nanosize quantum-dot (QD) arrays are found to vary significantly around the exciton resonance frequency of the QDs. In order to simulate the interactions between electromagnetic waves and QD arrays, a general auxiliary-differential-equation, finite-difference time-domain approach is introduced and utilized in this article. Using this numerical method, the exciton-polariton resonances of single-layer and double-layer GaAs QD arrays are studied. The optical properties of a single-layer QD array are found to be characterized by the Mie resonance of its constituent QDs, while a double-layer QD array is characterized by the quasi-dipole formed by two QDs positioned in each of the two layers.

Ämnesord

NATURVETENSKAP  -- Kemi -- Teoretisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)

Nyckelord

Excitons; Finite difference time domain method; Optical properties; Semiconductor quantum dots; Exciton-polariton resonances; Quantum-dot arrays; Resonance; article; computer simulation; finite element analysis; light; methodology; surface plasmon resonance; theoretical model; Computer Simulation; Finite Element Analysis; Light; Models

Theoretical; Quantum Dots; Surface Plasmon Resonance

Theoretical chemistry

Teoretisk kemi

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