Modification of the Emission Spectrum of a Quantum Emitter in the Vicinity of Bismuth Chalcogenide Microparticles

Abstract

We examine theoretically the effect of bismuth chalcogenide microparticles on the spontaneous emission of a double-V-type quantum emitter in free space. We have found, in particular, that the presence of a single microparticle causes a high degree of quantum interference in the way the quantum emitter releases energy in the process of spontaneous emission. This, in turn, leads to significant changes in the spectrum of the emitted energy. The quantum emitter’s initial state is crucial to how the energy is released in the presence of the microparticle. This observation has potential implications for quantum computing, particularly for reading the state of atomic qubits. When two microparticles are present, the effect is more pronounced, particularly when the quantum emitter is located in the gap between the particles.

Dirac Plasmon Polaritons and Magnetic Modes in Topological-Insulator Nanoparticles

“…At even higher energies, a surface phonon polariton ( SPhP ) becomes prominent, emerging exactly where Reε 1 = −2 (the Fröhlich condition for a resonance within the quasistatic approximation according to eq for δ R = 0); the frequency at which this happens is indicated with a vertical dashed line in Figure a. This mode has already been proven responsible for a strong anisotropic Purcell effect in the case of microspheres. − For a 10 nm radius (Figure b), the SPhP precisely aligns with the 66 meV mark of Figure a, while for larger radii ( R = 100 nm in Figure c), it only shifts slightly, to around 68 meV, due to retardation. In what follows, we will demonstrate that taking into account the surface states introduces DPPs, which lead to additional magnetic modes of topological nature, dramatically altering the optical response of the system.…”