Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies

doi:10.1088/1674-1056/22/7/077301

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77301-077301.doi: 10.1088/1674-1056/22/7/077301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies

陈林^a, 张天^a, Li Xun^b

a Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
b Department of Electrical and Computer Engineering, McMaster University, Ontario L8S4L8, Canada

收稿日期:2013-01-13 修回日期:2013-03-14 出版日期:2013-06-01 发布日期:2013-06-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11104093) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2011QN041).

Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies

Chen Lin (陈林)^a, Zhang Tian (张天)^a, Li Xun^b

a Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
b Department of Electrical and Computer Engineering, McMaster University, Ontario L8S4L8, Canada

Received:2013-01-13 Revised:2013-03-14 Online:2013-06-01 Published:2013-06-01
Contact: Chen Lin E-mail:chen.lin@mail.hust.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11104093) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2011QN041).

摘要/Abstract

摘要： The group velocity of long-range surface plasmon polaritons (LRSPPs) in a wide frequency bandwidth at infrared frequencies is significantly reduced by dielectric gratings of graded thickness on both sides of a thin metal film. This structure can reduce the propagation loss of slow surface plasmons in “rainbow trapping” systems based on plasmonic Bragg gratings. Compared with dielectric gratings of graded thickness on a single side of a metal film, the proposed structure is able to guide slow light with a much longer propagation distance for the same group index factor. Finite-difference time-domain simulation results show that slow LRSPPs with the group velocity of c/14.5 and the propagation distance of 10.4 μm are achieved in dielectric gratings of uniform thickness on both sides of a thin metal film at 1.62 μm.

关键词: surface plasmon polaritons, slow light, photonic integrated circuits

Abstract: The group velocity of long-range surface plasmon polaritons (LRSPPs) in a wide frequency bandwidth at infrared frequencies is significantly reduced by dielectric gratings of graded thickness on both sides of a thin metal film. This structure can reduce the propagation loss of slow surface plasmons in “rainbow trapping” systems based on plasmonic Bragg gratings. Compared with dielectric gratings of graded thickness on a single side of a metal film, the proposed structure is able to guide slow light with a much longer propagation distance for the same group index factor. Finite-difference time-domain simulation results show that slow LRSPPs with the group velocity of c/14.5 and the propagation distance of 10.4 μm are achieved in dielectric gratings of uniform thickness on both sides of a thin metal film at 1.62 μm.

Key words: surface plasmon polaritons, slow light, photonic integrated circuits

中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

73.20.Mf

42.25.Bs (Wave propagation, transmission and absorption) 52.40.Db (Electromagnetic (nonlaser) radiation interactions with plasma) 42.79.Gn (Optical waveguides and couplers)

陈林, 张天, Li Xun. Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies[J]. 中国物理B, 2013, 22(7): 77301-077301.

Chen Lin (陈林), Zhang Tian (张天), Li Xun. Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies[J]. Chin. Phys. B, 2013, 22(7): 77301-077301.

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Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies

Rainbow trapping based on long-range plasmonic Bragg gratings at telecom frequencies

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