2024-10-02 アルゴンヌ国立研究所(ANL)
＜関連情報＞
- https://www.anl.gov/article/quantum-research-paves-the-way-toward-efficient-ultrahighdensity-optical-memory-storage
- https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.033170
固体中の局在量子エミッター間の近接場エネルギー移動の第一原理研究 First-principles investigation of near-field energy transfer between localized quantum emitters in solids
Swarnabha Chattaraj, Supratik Guha, and Giulia Galli
Physical Review Research Published 14 August 2024
DOI:https://doi.org/10.1103/PhysRevResearch.6.033170
Abstract
We present a predictive and general approach to investigate near-field energy transfer processes between localized defects in semiconductors, which couples first-principles electronic structure calculations and a nonrelativistic quantum electrodynamics description of photons in the weak-coupling regime. The approach is general and can be readily applied to investigate broad classes of defects in solids. We apply our approach to investigate an exemplar point defect in an oxide, the F center in MgO, and we show that the energy transfer from a magnetic source, e.g., a rare-earth impurity, to the vacancy can lead to spin nonconserving long-lived excitations that are dominant processes in the near field, at distances relevant to the design of photonic devices and ultrahigh dense memories. We also define a descriptor for coherent energy transfer to predict geometrical configurations of emitters to enable long-lived excitations, that are useful to design optical memories in semiconductor and insulators.
