Actively tunable metamaterial resonators based on colossal magnetoresistance in the infrared regime

Cheng Wang; Changchun Yan; Jiebing Tian; Ying Han; Rongyuan Zou; Dongdong Li; Daohua Zhang

doi:10.3788/COL201513.051601

Journals >Chinese Optics Letters >Volume 13 >Issue 5 >Page 051601 > Article

Chinese Optics Letters
Vol. 13, Issue 5, 051601 (2015)

Actively tunable metamaterial resonators based on colossal magnetoresistance in the infrared regime

Cheng Wang¹, Changchun Yan^1、*, Jiebing Tian¹, Ying Han¹, Rongyuan Zou¹, Dongdong Li¹, and Daohua Zhang²

Author Affiliations

¹Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China

²School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore

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DOI: 10.3788/COL201513.051601 Cite this Article Set citation alerts

Cheng Wang, Changchun Yan, Jiebing Tian, Ying Han, Rongyuan Zou, Dongdong Li, Daohua Zhang. Actively tunable metamaterial resonators based on colossal magnetoresistance in the infrared regime[J]. Chinese Optics Letters, 2015, 13(5): 051601 Copy Citation Text

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(a) Schematic of a unit cell with centrosymmetric structure and the period p=2 μm. (b) Schematic of the cross, including the gold and La0.7Ca0.3MnO3 in the unit cell, with the dimensions of a=800 nm, b=300 nm, c=640 nm, d=150 nm, and e=100 nm. (c) Schematic of the gold cross.

Fig. 1. (a) Schematic of a unit cell with centrosymmetric structure and the period p=2 μm. (b) Schematic of the cross, including the gold and La0.7Ca0.3MnO3 in the unit cell, with the dimensions of a=800 nm, b=300 nm, c=640 nm, d=150 nm, and e=100 nm. (c) Schematic of the gold cross.

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(a) Reflection, (b) transmission, (c) absorption, and (d) phase of the transmission coefficient as functions of the frequency for different H0 values.

Fig. 2. (a) Reflection, (b) transmission, (c) absorption, and (d) phase of the transmission coefficient as functions of the frequency for different H0 values.

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Fig. 3. Current distributions in the gold and La0.7Ca0.3MnO3 at (a) 165, (b) 125, and (c) 150 THz corresponding to 9 Oe and 62.1 and 65.1 kOe, respectively. The areas surrounded by blue dotted lines are the concentrated values of the current oscillations.

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Fig. 4. Schematics of the (a) ENCM, (b) EIM, and (c) EWCM corresponding to the areas marked by blue dotted lines shown in Figs. 3(a), 3(b), and 3(c), respectively. The material of the structures is gold.

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Fig. 5. (a) Reflection and (b) transmission as functions of the frequency corresponding to the three models in Figs. 4(a), 4(b), and 4(c), respectively.

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