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Applied Physics Letters / Volume 92 / Issue 2 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 92, 021119 (2008); http://dx.doi.org/10.1063/1.2830838 (3 pages)

A frequency-selective circulator via mode coupling between surface waveguide and resonators

A. Q. Liu1, E. H. Khoo1,2, T. H. Cheng1, E. P. Li2, and J. Li3

1School of Electrical and Electronic Engineering Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
2Institute of High Performance Computing, 1 Science Park Road, Singapore Science Park II, Singapore 117528, Singapore
3Institute of Microelectronics, 11 Science Park Road, Singapore Science Park II, Singapore 117685, Singapore

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(Received 2 October 2007; accepted 12 December 2007; published online 17 January 2008)

In this letter, a frequency-selective circulator via mode coupling between a circular photonic crystal (CPC) surface waveguide and resonator systems is developed. The curve surface waveguide is formed by reducing the outermost rods radii. It has a transmission efficiency of 95% when the surface concentric distance is reduced by half. The resonator system, which consists of rod(s) are placed at each of the CPC perpendicular axis. Using optimized resonator physical parameters, selected frequencies are dropped at different locations with efficiency of 97%. It is suggested that several circulators can be cascaded to build a large scale frequency-selective multiplexing system.

© 2008 American Institute of Physics

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KEYWORDS and PACS

Keywords

circular waveguides, optical circulators, optical resonators, photonic crystals

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2830838

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    E. Moreno, F. J. Garcia-Vidal, and L. Martin-Moreno, Phys. Rev. B 69, 121402 (2004).

    B. Wang, W. Dai, A. Fang, L. Zhang, G. Tuttle, Th. Koschny, and C. M. Soukoulis, Phys. Rev. B 74, 195104 (2006).

    Z. Zhang, M. Dainese, L. Wosinski, S. Xiao, and M. Qiu, Appl. Phys. Lett. 90, 041108 (2007)APPLAB000090000004041108000001.

    A. Mekis, J. C. Chen, I. Kurland, S. Fan, P. R. Villeneuve, and J. D. Joannopoulos, Phys. Rev. Lett. 77, 3787 (1996).


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