Photon tunneling in composite layers of negative- and positive-index media

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

Volumn 70, Issue 4 2, 2004, Pages

  Kim, Kyoung Youm ^a  

^a SAMSUNG Electronics   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

CARRIER COMMUNICATION; ELECTRIC IMPEDANCE; MECHANICAL PERMEABILITY; PERMITTIVITY; POLARIZATION; REFLECTION; VACUUM; VECTORS;

NEGATIVE PERMITTIVITY; PHOTON TUNNELING; POSITIVE-INDEX MEDIA; TRANSMISSION COEFFICIENTS;

PHOTONS;

EID: 41349101153     PISSN: 15393755     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.70.047603     Document Type: Article

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24. 1|. The remaining parts of the equations and all relevant discussions remain the same.
25. j for TM photons. Therefore, it is the same for all polarization modes of photons. However, if the barrier is made of single negative materials [in which only one of the material parameters (permittivity or permeability) has negative value], the TE and TM modes of photons have different effective barrier lengths and, thus, show different features of tunneling properties such as a post-tunneling positional shift. These discussions will be reported in detail elsewhere.
26. In this case, the overall barrier has an average index of zero. The alternate stack of PIM and NIM layers composing the tunneling barrier in this Brief Report can have both periodic and aperiodic structures. It is well known that in periodic structures (superlattices) containing both the PIM and NIM layers, there exists the PBG corresponding to an average index of zero whose features are quite different from those of conventional Bragg band gap [17,20], This seems to be contradictory to the calculation results of zero reflection in the main text. However, the PBG corresponding to an average index of zero can exist only if there is an impedance mismatch between the PIM and NIM layers. In this Brief Report, since only impedance-matched PIM and NIM layers are considered to form the barrier, the PBG cannot show up and the zero-reflection phenomena can occur although the average index of the refraction in the (barrier) superlattice vanishes.
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