12 May 2004 Magneto-optical Kerr effect and photonic bandgap in cobalt nanodisc array
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Proceedings Volume 5280, Materials, Active Devices, and Optical Amplifiers; (2004) https://doi.org/10.1117/12.520374
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
Abstract
In this paper, we report our experimental investigation on two-dimensional (2-D) magneto-photonic crystals (MPCs) by using high-precision magneto-optical Kerr effect (MOKE) measurement. Our 2-D MPC is in the form of a periodic triangular array of cobalt (Co) circular nano-discs on a silicon (Si) substrate. Preliminary longitudinal MOKE measurement reveals a hysteresis loop that suggests a saturated Kerr rotation of ≈ 0.05°. We numerically investigate the potential photonic band gap (PBG) phenomenon of a triangular nano-disc array with the Co real refractive index = 2.26 by using 2-D finite-different time-domain (FDTD) method. We observe relatively wide TM-polarization (E-field⊥substrate) band gaps in the 1550-nm telecommunication wavelengths: 500 nm in the -M Γ direction whereas 400 nm in the -K Γ direction.
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Kin Man Tsia, Chi Lok Cheng, Silas T. Hung, Andrew W. Poon, "Magneto-optical Kerr effect and photonic bandgap in cobalt nanodisc array", Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); doi: 10.1117/12.520374; https://doi.org/10.1117/12.520374
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