ITP OpenIR  > SCI期刊论文
Nie, Wei2; Shi, Tao3,4; Nori, Franco2,5; Liu, Yu-xi
Topology-Enhanced Nonreciprocal Scattering and Photon Absorption in a Waveguide
AbstractTopological matter and topological optics have been studied in many systems, with promising applications in materials science and photonics technology. These advances motivate the study of the interaction between topological matter and light, as well as topological protection in light-matter interactions. In this work, we study a waveguide-interfaced topological atom array. The light-matter interaction is nontrivially modified by topology, yielding optical phenomena. We find topology-enhanced photon absorption from the waveguide for a large Purcell factor, i.e., F/ F0 > 1, where F and F0 are the atomic decays to the waveguide and environment, respectively. To understand this unconventional photon absorption, we propose a multichannel scattering approach and study the interaction spectra for edge- and bulk-state channels. We find that, by breaking inversion and time-reversal symmetries, optical anisotropy is enabled for the reflection process, but the transmission is isotropic. Through a perturbation analysis of the edge-state channel, we show that the anisotropy in the reflection process originates from the waveguide-mediated non-Hermitian interaction. However, the inversion symmetry in the non-Hermitian interaction makes the transmission isotropic. At a topology-protected atomic spacing, the subradiant edge state exhibits huge anisotropy. Because of the interplay between edge- and bulk-state channels, a large topological bandgap enhances nonreciprocal reflection of photons in the waveguide for weakly broken time-reversal symmetry, i.e., F0/ F << 1, producing complete photon absorption. We show that our proposal can be implemented in superconducting quantum circuits. The topology-enhanced photon absorption is useful for quantum detection. This work shows the potential to manipulate light with topological quantum matter.
Cooperation Status国际
Subject AreaPhysics
MOST Discipline CataloguePhysics, Applied
Indexed BySCIE
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Document Type期刊论文
Affiliation1.Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China
2.Frontier Sci Ctr Quantum Informat, Beijing, Peoples R China
3.RIKEN Cluster Pioneering Res, Theoret Quantum Phys Lab, Wako, Saitama 3510198, Japan
4.Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China
6.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Recommended Citation
GB/T 7714
Nie, Wei,Shi, Tao,Nori, Franco,et al. Topology-Enhanced Nonreciprocal Scattering and Photon Absorption in a Waveguide[J]. PHYSICAL REVIEW APPLIED,2021,15(4):44041.
APA Nie, Wei,Shi, Tao,Nori, Franco,&Liu, Yu-xi.(2021).Topology-Enhanced Nonreciprocal Scattering and Photon Absorption in a Waveguide.PHYSICAL REVIEW APPLIED,15(4),44041.
MLA Nie, Wei,et al."Topology-Enhanced Nonreciprocal Scattering and Photon Absorption in a Waveguide".PHYSICAL REVIEW APPLIED 15.4(2021):44041.
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