Terahertz nonreciprocal isolator based on a magneto-optical microstructure at room temperature.
Opt Lett
; 43(4): 687-690, 2018 Feb 15.
Article
en En
| MEDLINE
| ID: mdl-29444053
ABSTRACT
We investigated THz nonreciprocal circularly polarized transmission in thin longitudinally magnetized InSb film, especially focusing on its non-eigen nonreciprocal transmission mechanism at room temperature. Then, based on this effect, we presented a THz isolator for linear polarized waves. The nonreciprocal transmission of the InSb film in this device is converted and enhanced by a pair of orthogonal artificial birefringence gratings. After the optimization, the isolation reaches 24 dB, and the insertion loss is <0.5 dB at room temperature and a low magnetic field.
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2018
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