Noginov, M. A. et al. Compensation of loss in propagating surface plasmon polariton by gain in adjacent dielectric medium. Opt. Express 16, 1385-1392

Center for Materials Research, Norfolk State University, Norfolk, VA 23504, USA.
Optics Express (Impact Factor: 3.49). 02/2008; 16(2):1385-92. DOI: 10.1364/OE.16.001385
Source: PubMed

ABSTRACT We report the suppression of loss of surface plasmon polariton propagating at the interface between silver film and optically pumped polymer with dye. The large magnitude of the effect enables a variety of applications of 'active' nanoplasmonics. The experimental study is accompanied by the analytical description of the phenomenon. In particular, we resolve the controversy regarding the direction of the wavevector of a wave with a strong evanescent component in an active medium.

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    • "Moreover , we apply this approach to propagation of the SPP in the amplifying media. Nowadays, because of the significant applications of this field, many efforts have been devoted to the SPP amplification [23] [24] [25] [26] [27] [28].The quantum approach not only enables us to take into account the SPP amplification, but also the behavior of SPP's different states can be distinguished [29]. "
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    ABSTRACT: In this paper we will present a quantization method for SPP (Surface Plasmon Polariton) based on Green's tensor method, which is applied usually for quantization of EM-field in various dielectric media. This method will be applied for a semi-infinite structure, which contains metal and dielectric regions with one interface. Moreover, by introducing the quantized SPP, we will investigate the SPP propagation in the attenuating and amplifying systems. We will also consider two modes of SPP, i.e., coherent and squeezed states, and finally compare the propagation of these modes in the amplifying media.
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    • "According to Refs. [17] [20], Noginov et al. stated that the imaginary part of k z for the gain layer should always be positive if the dielectric is excited in total internal reflection (TIR) geometry. Although our configuration differs from that described in the references by repositioning the gain layer, the refractive index of N-SF5 glass (n = 1.6593 at 785 nm) is generally larger than that of PMMA (n = 1.4850 at 785 nm), rendering the critical angle be 63.5 • . "
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    ABSTRACT: It is known that the development of phase-detecting surface plasmon resonance (SPR) biosensors is impeded by the loss of information due to total photon to surface plasmon polariton transformation at resonance. In this work, a Kretschmann biosensor based on gainassisted surface plasmon polariton (SPP) amplifier was investigated with analytical and numerical methods. It was found that the gain-assisted SPP amplifying biosensor (SPAB) generated a single emission mode accompanied by a sharp phase jump in the optimal gain condition. The emission wavelength and the phase jump shifted according to the refractive index unit (RIU) change of the analyte. Thus, the SPR phase can be retrieved with unprecedented accuracy and refractive index resolution (RIR) of 1.1 × 10-11 RIU is feasible. Its figure of merit (FOM) for biosensing also attains 1.5 × 107 RIU-1. The predicted RIR and FOM are two orders of magnitude over existing SPR sensors.
    Sensors and Actuators B Chemical 04/2015; DOI:10.1016/j.snb.2014.12.095 · 4.10 Impact Factor
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    • "As a result, the propagation distance of SPs is less than 100 μm , which is a severe restriction in SPs application as a highly confined optical waveguide compatible with contemporary CMOS technology. There are several suggestions to overcome this problem and one of them is to introduce an optical gain medium in a layer adjoining to the metallic layer [14] [15] [16] [17] [18] [19] [20] [21] [22] [23]. Application of different types of dielectric-loaded SP waveguides is another promising approach to enhance the propagation length [24] [25] [26] [27] [28] [29] [30] [31]. "
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    ABSTRACT: Surface plasmons' (SPs) excitation in Kretschmann-type structure, where a thin metallic layer upon the dielectric prism substituted by a metal-dielectric layered (MDL) structure, is analysed via numerical simulation. Four possible alternations in MDL structure at fixed metallic and dielectric layers' thickness are considered and favorable structure is indicated. It is revealed, that MDL structures support SPs when the sum of metallic layers' thickness is about the thickness of a single metallic layer in conventional Kretschmann structure.
    2014 16th International Conference on Transparent Optical Networks (ICTON); 07/2014
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