All Optical Metamaterial Circuit Board at the Nanoscale

Department of Electrical and Systems Engineering, University of Pennsylvania, 200 South 33rd Street, ESE 203 Moore, Philadelphia, Pennsylvania 19103, USA.
Physical Review Letters (Impact Factor: 7.73). 10/2009; 103(14):143902. DOI: 10.1103/PhysRevLett.103.143902
Source: PubMed

ABSTRACT Optical nanocircuits may pave the way to transformative advancements in nanoscale communications. We introduce here the concept of an optical nanocircuit board, constituted of a layered metamaterial structure with low effective permittivity, over which specific traces that channel the optical displacement current may be carved out, allowing the optical "local connection" among "nonlocal" distant nanocircuit elements. This may provide "printed" nanocircuits, realizing an all-optical nanocircuit board over which specific grooves may be nanoimprinted within the realms of current nanotechnology.

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    ABSTRACT: Two-dimensional dielectric photonic crystals (PCs) having periodic air hole cylinders, when designed properly, exhibit near-zero effective refractive index and the wave impedance is dependent on local observation points. The incident wave is mostly reflected at the PC-air interface due to large impedance mismatch. We show, analytically and numerically, that even in the near-zero effective refractive index case the reflection can be suppressed by utilizing an antireflection structure consisting of a PC with the same lattice constant but a different radius for the periodic air hole cylinders. The antireflection PC must be truncated at properly selected cross sections in order to possess the same impedance at cross sections with the host PC and with the air structure. An analytical model combined with the plane-wave expansion method captures the antireflection behavior obtained by the full wave simulations.
    Physical Review B 09/2014; 90(11). DOI:10.1103/PhysRevB.90.115412 · 3.66 Impact Factor
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    ABSTRACT: The concept of metamaterial-inspired nanocircuits, dubbed metatronics, was introduced in [Science 317, 1698 (2007); Phys. Rev. Lett. 95, 095504 (2005)]. It was suggested how optical lumped elements (nanoelements) can be made using subwavelength plasmonic or non-plasmonic particles. As a result, the optical metatronic equivalents of a number of electronic circuits, such as frequency mixers and filters, were suggested. In this work we further expand the concept of electronic lumped element networks into optical metatronic circuits and suggest a conceptual model applicable to various metatronic passive networks. In particular, we differentiate between the series and parallel networks using epsilon-near-zero (ENZ) and mu-near-zero (MNZ) materials. We employ layered structures with subwavelength thicknesses for the nanoelements as the building blocks of collections of metatronic networks. Furthermore, we explore how by choosing the non-zero constitutive parameters of the materials with specific dispersions, either Drude or Lorentzian dispersion with suitable parameters, capacitive and inductive responses can be achieved in both series and parallel networks. Next, we proceed with the one-to-one analogy between electronic circuits and optical metatronic filter layered networks and justify our analogies by comparing the frequency response of the two paradigms. Finally, we examine the material dispersion of near-zero relative permittivity as well as other physically important material considerations such as losses.
    Optics Express 10/2014; 22(21). DOI:10.1364/OE.22.025109 · 3.53 Impact Factor
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    ABSTRACT: We study the properties of electromagnetic waves propagating along the waveguides with a periodic core created by alternating metal and dielectric layers, the so-called quasi-one-dimensional plasmonic crystal waveguides. Such waveguides can be symmetric or asymmetric depending on the cladding or substrate material properties, as well as on the termination of the periodic structure. We analyze the dispersion characteristics as well as the profiles of the guided modes for several types of the waveguide structures.
    2nd International Conference on Metaterials, Photonic Crystals and Plasmonics META'10, Cairo, Egypt; 02/2010


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