Volume 113, Number 6, March 2016
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||12 April 2016|
Bloch states in light transport through a perforated metal
1 Yerevan Physics Institute - Alikhanian Brothers St. 2, 0036 Yerevan, Armenia
2 Institute of Radiophysics and Electronics - Ashtarak-2, 0203, Armenia
3 California State University - Bakersfield, CA 93311-1022, USA
4 Departamento de Física, Universidad de Murcia - E-30071 Murcia, Spain
Received: 27 January 2016
Accepted: 23 March 2016
Light transport in a metal with two-dimensional hole arrays is considered. Analytical expressions for a transmission coefficient in periodic, isolated and disordered cases are derived, assuming the existence of waveguide modes transverse tunneling in a two-dimensional plane perpendicular to the traveling direction of light. The one-dimensional case of periodic holes, due to its simplicity, is investigated in detail. In the dilute metal regime, when metal fraction is small, our numerical study of the transmission coefficient of the central diffracted wave indicates the existence of a minimum which is completely independent of an incident wavelength. Further increasing of the metal fraction leads to the unusual monotonic increasing of the central-diffracted-wave transmission. The role of the surface plasmons is discussed.
PACS: 42.25.Fx – Diffraction and scattering / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 78.66.-w – Optical properties of specific thin films
© EPLA, 2016
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