Nonreciprocal Magneto-Plasmonic Waveguide with Compact Metal-Sandwiched Structure
JIN Yi-Chang, XU Chao, QIU Hui-Ye, XIANG Le-Qiang, YANG Jian-Yi, JIANG Xiao-Qing**
Department of Information Science and Electronics Engineering, Zhejiang University, Hangzhou 310027
Abstract ：A magneto-optical (MO) metal-sandwiched multilayered structure composed of metal, MO medium and dielectric buffer layers is presented and investigated by finite-element-method-based-mode solver and perturbation theory. The results show that this structure exhibits large nonreciprocal phase shift, strong mode confinement in the narrow buffer layers as well as very low propagation loss. The propagation length with 1 dB loss is much longer than the required length of π /2 nonreciprocal phase shifts in this structure. The modal area is smaller than half of the conventional MO waveguides. This phenomenon can be used to achieve a compact plasmonic isolator based on the Mach–Zehnder interferometer.
收稿日期: 2013-06-13
出版日期: 2013-11-21
:
42.82.-m
(Integrated optics)
73.20.Mf
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
85.70.Sq
(Magnetooptical devices)
[1] Wallenhorst M, Niemijller M, D?tsch H, Hertel P, Gerhardt R and Gather B 1995 J. Appl. Phys. 77 2902 1998 Appl. Phys. Lett. 72 2508 1999 IEEE J. Quantum Electron. 35 250 2004 Opt. Lett. 29 941 2000 Appl. Phys. Lett. 76 2158 2007 Opt. Express 15 639 2012 Opt. Express 20 18440 2012 Opt. Express 20 8256 2006 Appl. Phys. Lett. 89 251115 2006 J. Lightwave Technol. 24 945 2009 Opt. Express 17 16646 2008 Nat. Photon. 2 496 2012 J. Lightwave Technol. 30 163 2009 Chin. Phys. B 18 3535 2013 Chin. Phys. Lett. 30 034208 1993 J. Appl. Phys. 74 4877 2009 Opt. Commun. 282 862 2005 J. Opt. Soc. Am. B 22 240
[1]
.
[2]
.
[3]
.
[4]
.
[5]
.
[6]
.
[7]
.
[8]
.
[9]
.
[10]
.
[11]
.
[12]
.
[13]
.
[14]
.
[15]
.
2013, Vol. 30 
