Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10548
Title: Nonreciprocal μ -near-zero mode in PT -symmetric magnetic domains
Authors: Wang, J
Dong, HY
Ling, CW
Chan, CT
Fung, KH 
Issue Date: 2015
Publisher: American Physical Society
Source: Physical review. B, Condensed matter and materials physics, 2015, v. 91, no. 23, 235410 How to cite?
Journal: Physical review. B, Condensed matter and materials physics 
Abstract: We find that a new type of nonreciprocal modes exists at an interface between two parity-time- (PT-) symmetric magnetic domains (MDs) near the frequency of zero effective permeability. This mode is nonpropagating and purely magnetic when the two MDs are semi-infinite, while it becomes propagating in the finite case. In particular, two pronounced nonreciprocal responses could be observed via the excitation of this mode: one-way optical tunneling for oblique incidence and unidirectional beam shift at normal incidence. When the two MDs system becomes finite in size, it is found that perfect-transmission mode could be achieved if PT symmetry is maintained. The unique properties of such an unusual mode are investigated by analytical modal calculation as well as numerical simulations. The results suggest a different approach to the design of compact optical isolator.
URI: http://hdl.handle.net/10397/10548
ISSN: 1098-0121
EISSN: 1550-235X
DOI: 10.1103/PhysRevB.91.235410
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