Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.036804
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Funding
- ERC [321268 iPLASMM]
- Ministry of Education and Science (Russia)
- Australian Research Council (Australia)
- Royal Society's Newton International Fellowship
- Ministry of Education and Science of the Russian Federation [11.G34.31.0020, 14.B37.21.1649, 14.B37.21.1941]
- Russian Foundation for Basic Research [12-02-12097, 12-0233034]
- Grant of President of Russian Federation [MD-6805.2013.2]
- EPSRC (UK)
- Engineering and Physical Sciences Research Council [EP/J018457/1, EP/K007793/1] Funding Source: researchfish
- EPSRC [EP/K007793/1, EP/J018457/1] Funding Source: UKRI
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Optical forces constitute a fundamental phenomenon important in various fields of science, from astronomy to biology. Generally, intense external radiation sources are required to achieve measurable effects suitable for applications. Here we demonstrate that quantum emitters placed in a homogeneous anisotropic medium induce self-torques, aligning themselves in the well-defined direction determined by an anisotropy, in order to maximize their radiation efficiency. We develop a universal quantum-mechanical theory of self-induced torques acting on an emitter placed in a material environment. The theoretical framework is based on the radiation reaction approach utilizing the rigorous Langevin local quantization of electromagnetic excitations. We show more than 2 orders of magnitude enhancement of the self-torque by an anisotropic metamaterial with hyperbolic dispersion, having negative ratio of permittivity tensor components, in comparison with conventional anisotropic crystals with the highest naturally available anisotropy.
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