1,354,103 research outputs found
Data for 'Coherent Perfect Absorption of Single Photons in a Fibre Network'
No full textResearch data for the paper
Vetlugin, A. N., Guo, R., Xomalis, A., Yanikgonul, S., Adamo, G., Soci, C., & Zheludev, N. (Accepted/In press). Coherent Perfect Absorption of Single Photons in a Fibre Network. Applied Physics Letters.</span
Dataset for Cryptography in coherent optical information networks using dissipative metamaterial gates
No full textDataset for:
Xomalis, A., et al (2019). Cryptography in coherent optical information networks using dissipative metamaterial gates. APL Photonics 4, 046102 doi: 10.1063/1.5092216. </span
Dataset for Nonlinear control of coherent absorption and its optical signal processing applications
No full textDataset supports the paper:
Xomalis A, Jung Y, Demirtzioglou I, Lacava C, Plum E, Richardson D, Petropoulos P, Zheludev N, "Nonlinear control of coherent absorption and its optical signal processing applications," APL Photonics 4, 106109 (2019).</span
Data for 'Picosecond all-optical switching and dark pulse generation in a fibre-optic network using a plasmonic metamaterial absorber'
No full textDataset for the journal paper Angelos Xomalis, Iosif Demirtzioglou, Yongmin Jung, Eric Plum, CosimoLacava, Periklis Petropoulos, David J. Richardson, and Nikolay I. Zheludev "Picosecond all-optical switching and dark pulse generation in a fibre-optic network using a plasmonic metamaterial absorber</span
Dataset for: A Fiberized Metamaterial Device for Ultrafast Control of Coherent Optical Signals
No full textDataset for the manuscript 'A Fiberized Metamaterial Device for Ultrafast Control of Coherent Optical Signals' by Iosif Demirtzioglou, Angelos Xomalis, Eric Plum, Yongmin Jung, Cosimo Lacava, Kevin F. MacDonald, Periklis Petropoulos, David J. Richardson, and Nikolay I. Zheludev.
The research data corresponds to the above-stated manuscript and it should be read and interpreted in the context of its published form. Each set of data describes a figure illustrated in the published manuscript and is accompanied by appropriate captions which correspond to the figure numbers, axis titles and legend entries stated in the manuscript.</span
Coherent all-optical signal processing using fibre-optic metadevices
No full textThis Thesis merges the physics of metamaterials with optical fibre technology in order to demonstrate low-power, high-bandwidth signal processing applications. Control over optical absorption using linear coherent interactions of light beams with metasurfaces of deeply subwavelength thickness offers a range of novel opportunities. Here I report on:♦ The first demonstration of a fibre-optic metadevice for coherent all-optical signal processing. The fibre metamaterial has been integrated and packaged resulting in a device that is compatible with standard fibre-optics components.♦ All-optical signal switching, effective nonlinearity and logical functions XOR, NOT and AND performed within a coherent fibre network at wavelengths between 1530 and 1565 nm. The metadevice has been tested at up to 40 Gbit/s with energy consumption as low as 2.5 fJ/bit.♦ Dark pulse generation, selective transmission/absorption of 1 ps pulses and all-optical pulse shaping in the telecommunications C-band with 1 THz bandwidth in-fibre.♦ The first demonstration of a fibre-optic plasmonic/metamaterial device for data security applications. I introduced the concept of coherent cryptography, an optical layer secure communication protocol that does not rely on nonlinear optical processes but instead uses energy redistribution of coherent optical waves interacting on a metamaterial absorber. I demonstrated different types of encryption modes and reported a scheme providing perfect secrecy.♦ Nonlinear control of coherent absorption in a nonlinear fibre network containing a metamaterial absorber. I exploited power-dependent phase retardation arising from the Kerr effect for all-optical noise suppression, power-limiting, pulse restoration, pulse splitting and signal transfer between carrier wavelengths.In addition, I have developed and fabricated fibre metadevices, which have enabled:♦ The first demonstration of coherent perfect absorption and transmission for a single photons in a stabilized quantum fibre network by collaborators.To conclude, this Thesis investigates all-optical solutions provided by plasmonic metamaterials for coherent signal processing within fibre networks. The above proof-of-principle demonstrations show the appropriateness of such metasurfaces for fibre integration and illustrate application opportunities ranging from all-optical switching and pulse shaping to optical encoding and stabilization of fibre-optic classical and quantum information networks
Plasmonic coherent perfect absorption and switching in a fiberized quantum network
No full textIn this report we provide the first demonstration of a fully fiberized quantum network with a fiber-integrated metamaterial as a dissipative switching element. Using the phenomenon of coherent absorption in plasmonic metamaterials we achieve high-contrast control of the single photon absorption probability and demonstrate switching application
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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