期刊
PLASMONICS
卷 8, 期 2, 页码 1095-1099出版社
SPRINGER
DOI: 10.1007/s11468-013-9514-1
关键词
Index-near-zero metamaterials; Nonlocality; Parabolic dispersion; Subwavelength imaging
资金
- State Key Program for Basic Research of China [2012CB921501]
- National Natural Science Foundation of China [11104196, 11004147, 11104198]
- Natural Science Foundation of Jiangsu Province [BK2011277, BK2010211]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Program for New Century Excellent Talents in University (NCET)
We investigate metal-dielectric multilayered structures with an effectively zero permittivity. Nonlocality induced by the surface plasmons in such structures can produce intriguing dispersions characterized by two crossing branches of parabolas. We obtain the critical conditions to set the two branches of parabolas apart, and reverse the direction of group velocity such that the system becomes capable of negative refraction as well as subwavelength imaging. Such phenomena theoretically exist in the quasistatic limit.
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