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Updated: May 14, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Controlling the propagation of x-ray waves inside a heteroepitaxial crystal containing quantum dots using Berry's
Yoshiki Kohmura1, Kei Sawada, Susumu Fukatsu
1RIKEN SPring-8 Center, 1-1-1, Kouto, Sayo-gun, Hyogo 679-5148, Japan.
Abstract:
We study a new aspect of the Berry-phase effect as the collaborative x-ray translation by a crystal with undulated deformation. The macroscopic translation was observed around the interface of a heteroepitaxial crystal deformed by quantum dots of 4.1 germanium monolayers on a silicon substrate. The quantum dots formed a large local gradient of deformation at the interface, which triggered the x-ray translation into two directions. This effect provides a new probe for investigating the interfacial strain, and leads to a single-crystal beam splitter with parallel exit beams.
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