All-Angle Quasi-Self-Collimation Effect in a Rod-Type Silicon Photonic Crystal

Ming Li; Wei Li; Haiyang Huang; Jing Wang; You Li; Aimin Wu; Zhen Sheng; Xi Wang; Shichang Zou; Fuwan Gan

doi:10.1109/JPHOT.2015.2399433

IEEE Photonics Journal (Jan 2015)

All-Angle Quasi-Self-Collimation Effect in a Rod-Type Silicon Photonic Crystal

Ming Li,
Wei Li,
Haiyang Huang,
Jing Wang,
You Li,
Aimin Wu,
Zhen Sheng,
Xi Wang,
Shichang Zou,
Fuwan Gan

Affiliations

Ming Li: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Wei Li: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Haiyang Huang: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Jing Wang: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
You Li: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Aimin Wu: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Zhen Sheng: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Xi Wang: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Shichang Zou: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Fuwan Gan: State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2015.2399433
Journal volume & issue: Vol. 7, no. 1
pp. 1 – 8

Abstract

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By changing the symmetry of a photonic crystal (PC) with a rectangular lattice to straighten one of the isofrequency contours, the PC shows an all-angle quasi-self-collimation (quasi-SC) effect. To investigate the straightness of the isofrequency contour and the quasi-SC effect, we propose a straightness factor L based on the method of least squares. With L ≤ L0 (L0 = 0.01 is the critical value), the isofrequency contour is sufficiently straight to induce the quasi-SC effect with the beam quasi-collimating in the structure. Furthermore, the efficiency of light coupling to the quasi-SC PC is studied and can be greatly improved by applying a carefully designed antireflection structure. This quasi-SC effect of the PC and the coupling structure may see applications in novel optical devices and photonic circuits.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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