Plasmonics: Merging Photonics and Electronics at Nanoscale Dimensions

Nanotechnology Research Center, Bilkent University, Bilkent, Ankara 06800 Turkey.
Science (Impact Factor: 33.61). 02/2006; 311(5758):189-93. DOI: 10.1126/science.1114849
Source: PubMed


Electronic circuits provide us with the ability to control the transport and storage of electrons. However, the performance of electronic circuits is now becoming rather limited when digital information needs to be sent from one point to another. Photonics offers an effective solution to this problem by implementing optical communication systems based on optical fibers and photonic circuits. Unfortunately, the micrometer-scale bulky components of photonics have limited the integration of these components into electronic chips, which are now measured in nanometers. Surface plasmon-based circuits, which merge electronics and photonics at the nanoscale, may offer a solution to this size-compatibility problem. Here we review the current status and future prospects of plasmonics in various applications including plasmonic chips, light generation, and nanolithography.

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    • "Plasmonics is executing a great significance in current nan- otechnology[1]. Unique phenomena like subwavelength con- finement[2], amplification of evanescent waves[3], extraordinary transmission[4], hyperbolic dispersion in complex metallic composites[5]and sharp resonances in nanoparticles and meta-atoms[6]have caused a tremendous impact. These lead to numerous devices and applications in photonics such as su- perlenses[7], nanoantennas[8], subwavelength waveguides[9], invisibility-cloaking structures[10], enhanced sensors for chemical detection of biological agents[11], color prints with resolutions up to the optical diffraction limit[12], and light trapping in thin-film solar cells[13], to mention a few. "

    Full-text · Article · Feb 2016 · Journal of the Optical Society of America B
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    • "Introduction.— Plasmonic excitations have attracted enormous interest in recent years from a variety of scientific fields due to their intriguing light-matter features and wide range of applications [1] [2]. Plasmonic biosensing, in particular, is one of the most successful applications, with devices that outperform conventional ones that rely on ordinary photonic components [3] [4] [5]. "
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    ABSTRACT: Photonic sensors have many applications in a range of physical settings, from measuring mechanical pressure in manufacturing to detecting protein concentration in biomedical samples. A variety of sensing approaches exist, and plasmonic systems in particular have received much attention due to their ability to confine light below the diffraction limit, greatly enhancing sensitivity. Recently, quantum techniques have been identified that can outperform classical sensing methods and achieve sensitivity below the so-called shot-noise limit. Despite this significant potential, the use of quantum techniques in plasmonic systems for further improving sensing capabilities is not well understood. Here, we study the sensing performance of a plasmonic interferometer that simultaneously exploits the quantum nature of light and its electromagnetic field confinement. We show that, despite the presence of loss, specialised quantum resources can provide improved sensitivity and resolution beyond the shot-noise limit within a compact plasmonic device operating below the diffraction limit.
    Full-text · Article · Jan 2016
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    • "However, the diffraction limit of light is a fundamental barrier to achieve more miniaturized photonic circuits using dielectric materials [2]. Plasmonics goes beyond the diffraction limit making possible the realization of subwavelength optical devices [3]–[7]. However, the high ohmic losses in conventional plasmonic materials hamper their application as waveguides [2]. "
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    DESCRIPTION: A recent computational result suggests that the diffraction limit can be overcome by all-dielectric metamaterials (S. Jahani et. al., Optica 1, 96 (2014)). This substantially decreases crosstalk between dielectric waveguides paving the way for high density photonic circuits. Here, we experimentally demonstrate, on an standard silicon-on-insulator (SOI) platform, that using a simple metamaterial between two silicon strip waveguides results in about 10-fold increase in coupling length. The proposed structure may lead to significant reduction of size of devices in silicon photonics.
    Full-text · Working Paper · Dec 2015
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