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Proceedings Paper

Polarization-dependent focusing of terahertz surface plasmon polaritons
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Paper Abstract

Focusing of terahertz (THz) surface plasmon polaritons (SPPs) excited by linearly and circularly polarized THz radiation is investigated experimentally and theoretically. A high-speed THz-SPPs imaging system is built up to measure both the amplitude and phase of the excited THz-SPPs. For the horizontally polarized THz radiation, the THz-SPPs will be focused in the centre of the semicircular slit and the phase images reveals a π/2 Gouy phase shift though the focal spot of THz-SPPs. With the illumination of vertically polarized THz radiation, the focal spot in the centre will split into two focal spots in the y-direction. For the circularly polarized incident THz radiation, the focal spot of THz-SPPs will shift upward or downward in the y-direction. FDTD simulations are performed and compared with the experimental results. A good agreement between experimental results and simulation results can be found.

Paper Details

Date Published: 5 November 2015
PDF: 5 pages
Proc. SPIE 9795, Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015, 97953K (5 November 2015); doi: 10.1117/12.2214415
Show Author Affiliations
Sen Wang, Harbin Institute of Technology (China)
Capital Normal Univ. (China)
Beijing Key Lab. for Metamaterials and Devices (China)
Xinke Wang, Capital Normal Univ. (China)
Yan Zhang, Harbin Institute of Technology (China)
Capital Normal Univ. (China)
Beijing Key Lab. for Metamaterials and Devices (China)


Published in SPIE Proceedings Vol. 9795:
Selected Papers of the Photoelectronic Technology Committee Conferences held June–July 2015
Shenggang Liu; Songlin Zhuang; Michael I. Petelin; Libin Xiang, Editor(s)

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