Abstract

In this Letter, a periodic structure in which each unit cell consists of one manganese oxide (${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_3$) strip and two gold strips is designed. By simulating the electromagnetic responses of the structure, we confirm that Fano resonances can be actively controlled in the infrared region by modulating the intensity of the external magnetic field applied to the structure. This is due to the colossal magneto-resistance of the ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_3$ material. Furthermore, a transmission phase can also be effectively tuned. The phase has a shift of $\mathrm{\Delta }\mathrm{\Phi }=1.05\mathrm{rad}$ at a frequency of 130 THz when the intensity of the external magnetic field varies from 5083 to $5193\mathrm{kA}/\mathrm{m}$. Such a tunable method has potential applications in controllable photoelectric elements.

© 2015 Optical Society of America

Tunable all-optical plasmonic diode based on Fano resonance in nonlinear waveguide coupled with cavities

Cairong Fan, Fenghua Shi, Hongxing Wu, and Yihang Chen
Opt. Lett. 40(11) 2449-2452 (2015)

Topological effects in anisotropy-induced nano-fano resonance of a cylinder

Dongliang Gao, Lei Gao, Andrey Novitsky, Hongli Chen, and Boris Luk’yanchuk
Opt. Lett. 40(17) 4162-4165 (2015)

Multiple fano resonances in spatially compact and spectrally efficient spoof surface plasmon resonators with composite textures

F. F. Qin, J. J. Xiao, Q. Zhang, and W. G. Liang
Opt. Lett. 41(1) 60-63 (2016)

Tunable plasmonic resonances based on elliptical annular aperture arrays on conducting substrates for advanced biosensing

Yuzhang Liang, Wei Peng, Lixia Li, Siyu Qian, and Qiao Wang
Opt. Lett. 40(16) 3909-3912 (2015)

Prediction of multiple resonance characteristics by an extended resistor–inductor–capacitor circuit model for plasmonic metamaterials absorbers in infrared

Xiaolun Xu, Yongqian Li, Binbin Wang, and Zili Zhou
Opt. Lett. 40(19) 4432-4435 (2015)