Circular polarization analyzer with polarization tunable focusing of surface plasmon polaritons

Journal Article · Mon Dec 14 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4938138· OSTI ID:22486251

Wang, Sen; Zhang, Yan ^[1]; Wang, Xinke ^[2]; Kan, Qiang ^[3]; Qu, Shiliang ^[4]

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1. Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)
2. Beijing Key Laboratory for Metamaterials and Devices, and Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048 (China)
3. State Key Laboratory for Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)
4. Optoelectronics Department, Harbin Institute of Technology at Weihai, Weihai 264209 (China)

A practical circular polarization analyzer (CPA) that can selectively focus surface plasmon polaritons (SPPs) at two separate locations, according to the helicity of the circularly polarized light, is designed and experimentally verified in the terahertz frequency range. The CPA consists of fishbone-slit units and is designed using the simulated annealing algorithm. By differentially detecting the intensities of the two SPPs focuses, the helicity of the incident circularly polarized light can be obtained and the CPA is less vulnerable to the noise of incident light. The proposed device may also have wide potential applications in chiral SPPs photonics and the analysis of chiral molecules in biology.

• OSTI ID: 22486251
• Journal Information: Applied Physics Letters, Vol. 107, Issue 24; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
CHIRALITY
DESIGN
ENANTIOMORPHS
FOCUSING
HELICITY
POLARIZATION
POLARONS
SIMULATION
SURFACES
THZ RANGE