Recent Submissions

  • Protecting block ciphers against differential fault attacks without re-keying 

    Baksi, Anubhab; Bhasin, Shivam; Breier, Jakub; Khairallah, Mustafa; Peyrin, Thomas (2018)
    In this article, we propose a new method to protect block cipher implementations against Differential Fault Attacks (DFA). Our strategy, so-called “Tweak-in-Plaintext”, ensures that an uncontrolled value ('tweak-in') is ...
  • Observation of an excitonic quantum coherence in CdSe nanocrystals 

    Dong, Shuo; Trivedi, Dhara; Chakrabortty, Sabyasachi; Kobayashi, Takayoshi; Chan, Yinthai; Prezhdo, Oleg V.; Loh, Zhi-Heng (2016)
    Optical pump-probe spectroscopy with 6-fs pulses elucidates the 1Se1S3/2–1Se2S3/2 excitonic quantum coherence in CdSe nanocrystals. This coherence encodes hole migration over nanometer length scales and markedly alters the ...
  • Mid-infrared generation in an uncoated wedge ZGP OPO 

    Tan, L.H.; Lim, H.W.J.; Phua, Poh-Boon (2016)
    Novel uncoated wedge ZGP OPO configuration was demonstrated, generating 3.8mJ of MIR pulses operating at 100Hz. The nature of the wedge configuration allows a highly stable OPO cavity from any misalignment on the cavity mirror.
  • Polariton laser diodes 

    Höfling, S.; Schneider, C.; Amthor, M.; Kim, N.Y.; Rahimi-Iman, A.; Savenko, I.G.; Shelykh, I.A.; Kulakovskii, V.D.; Kamp, M.; Reitzenstein, S.; Worschech, L.; Yamamoto, Y.; Forchel, A. (2014)
    Exciton-polariton lasers are operated in the strong light matter coupling regime. They promise low threshold operation since population inversion is not inherently necessary. Hence they are of great interest for next ...
  • Planar superconducting toroidal metamaterial : a source for oscillating vector-potential? 

    Savinov, V.; Delfanazari, K.; Fedotov, V. A.; Zheludev, Nikolay I. (2014)
    We demonstrate the first superconducting metamaterial that can exhibit a profound toroidal dipolar resonance. Quantum behaviour of the superconductor and toroidal excitation of the metamaterial are both necessary prerequisites ...
  • Using nonlinear optical networks for optimization: primer of the ant colony algorithm 

    Hu, Wenchao; Wu, Kan; Shum, Perry Ping; Zheludev, Nikolay I.; Soci, Cesare (2014)
    Using nonlinear Erbium doped optical fiber network we have implemented an optimization algorithm for the famous problem of finding the shortest path on the map for the ant colony to travel to the foraging area.
  • UV & visible plasmonic metamaterials made of topological insulator 

    Ou, Jun-Yu; So, Jin-Kyu; Adamo, Giorgio; Sulaev, Azat; Wang, Lan; Zheludev, Nikolay I. (2014)
    Plasmonic resonances are observed in metamaterials made of a topological insulator, Bi1.5Sb0.5Te1.8Se1.2, at the UV and visible frequencies due to the material’s interband transition and nontrivial surface conducting state.
  • Solid-immersion super-oscillatory lens for heat assisted magnetic recording technology and nanoscale imaging 

    Roy, Tapashree; Yuan, Guanghui; Rogers, Edward T. F.; Zheludev, Nikolay I. (2014)
    We demonstrate a solid-immersion super-oscillatory planar lens for super-resolution applications with a 102 nm full-width at half maximum focal spot in a low-loss immersion medium.
  • Lorentz force metamaterial with giant optical magnetoelectric response 

    Valente, João; Ou, Jun-Yu; Plum, Eric; Youngs, Ian J.; Zheludev, Nikolay I. (2014)
    We demonstrate the first reconfigurable photonic metamaterial controlled by electrical currents and magnetic fields, providing first practically useful solutions for sub-megahertz and high contrast modulation of metamaterial ...
  • Plasmonic super-oscillations and sub-diffraction focusing 

    Yuan, Guanghui; Rogers, Edward T F; Roy, Tapashree; Du, Luping; Shen, Zexiang; Zheludev, Nikolay I (2014)
    We demonstrate experimental focusing of surface plasmon polaritons beyond the plasmon diffraction limit using a super-oscillatory plasmonic antenna at the wavelength of 785nm, achieving a hot-spot as small as 300nm.
  • Plasmonic properties and photoinduced reflectance of topological insulator 

    Wang, Zilong; Yin, Jun; Adamo, Giorgio; Sulaev, Azat; Wang, Lan; Zheludev, Nikolay I.; Soci, Cesare (2014)
    We report on linear and nonlinear infrared and plasmonic properties of chalcogenide crystal of the Bi-Sb-Te-Se family that was recently identified as a prospective platform for switchable broadband plasmonic devices.
  • Interaction of flying electromagnetic doughnut with nanostructures 

    Raybould, T. A.; Papasimakis, N.; Fedotov, V. A.; Youngs, I.; Zheludev, Nikolay I. (2014)
    We report on the electromagnetic properties of the single-cycle “flying doughnut” electromagnetic permutations in the context of their interactions with nanoscale objects, such as dielectric and plasmonic nanoparticles.
  • Coherent control of Snell’s law 

    Shi, J. H.; Fang, X.; Zheludev, Nikolay I. (2014)
    We demonstrate coherent control of the generalized Snell’s law in ultrathin gradient metasurfaces constructed by an array of V-shaped slot nanoantennas.
  • Chalcogenide microfiber photonic synapses 

    Gholipour, B.; Bastock, P.; Khan, K.; Craig, C.; Hewak, D. W.; Zheludev, Nikolay I.; Soci, Cesare (2014)
    Optical axons and photonic synapses implemented using chalcogenide microfibers allow the generation and propagation of photonic action potentials which give rise to the demonstration of various neuromorphic concepts.
  • Magneto-photoconductivity of three dimensional topological insulator bismuth telluride 

    Cao, Bingchen; Eginligil, Mustafa; Yu, Ting (2018)
    Magnetic field dependence of the photocurrent in a 3D topological insulator is studied. Among the 3D topological insulators bismuth telluride has unique hexagonal warping and spin texture which has been studied by ...
  • Ultra-fast spinor switching in polariton condensates 

    Askitopoulos, Alexis; Ohadi, Hamid; Liew, Timothy Chi Hin; Hatzopoulos, Zaharias; Savvidis, Pavlos G.; Kavokin, Alexey V.; Lagoudakis, Pavlos G. (2014)
    We demonstrate a linear to circular polarization conversion mechanism of a confined polariton condensate created by an optical potential trap. This system features a high degree of circular polarization under linear ...
  • Quantum information with semiconductor nanostructures 

    Adrados, C.; Hivet, R.; Karr, J. P.; Romanelli, M.; Amo, A.; Liew, Timothy Chi Hin; Houdré, R.; Kavokin, A. V.; Pigeon, S.; Ciuti, C.; Carusotto, I.; Bramati, A.; Giacobino, Elisabeth (2011)
    Integrated optoelectronic devices based on exciton-polaritons are very promising for quantum information, since they allow quantum optical effects as well as spin control and spin switching. Moreover the quantum fluid ...
  • Photon and Polariton Condensates in Microcavities 

    Kammann, Elena; Ohadi, Hamid; Maragkou, Maria; Lagoudakis, Konstantinos G.; Liew, Timothy Chi Hin; Kavokin, Alexey V.; Lagoudakis, Pavlos G. (2012)
    We study thermalisation coherence and spin dynamics of photon and polariton Bose-Einstein condensates (BECs). We observe a Bose Einstein distribution, buildup of long-range order and spontaneous symmetry breaking.
  • Different carrier recombination processes in CsPbBr3 quantum dots and microcrystals 

    Qian, Cheng; Yin, Tingting; Yan, Jiaxu; Shen, Ze Xiang (2017)
    Good understanding of carrier generation and recombination is crucial for applications in LEDs, lasers, single photon sources and so on. In this work, we studied and compared charge generation and recombination processes ...
  • Laser Profiling for the Back-Side Fault Attacks: With a Practical Laser Skip Instruction Attack on AES 

    Breier, Jakub; Jap, Dirmanto; Chen, Chien-Ning (2015)
    Laser fault injection is one of the strongest fault injection techniques. It offers a precise area positioning and a precise timing, allowing a high repeatability of experiments. In our paper we examine possibilities of ...

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