Now showing items 1-20 of 3029

    • High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state : theory and experiment 

      Kon, W. Y.; Aman, J. A.; Hill, J. C.; Killian, T. C.; Hazzard, Kaden R. A. (2019)
      We investigate two-frequency photoassociation of a weakly bound molecular state, focusing on a regime where the AC Stark shift is comparable to the halo-state energy. In this “high-intensity” regime, we observe features ...
    • Maxwell eigenmode approach to the Casimir-Lifshitz torque 

      Broer, Wijnand; Liow, John Yuh Han; Lu, Bing-Sui (2019)
      More than 40 years ago, Barash published a calculation of the full retarded Casimir-Lifshitz torque for planar birefringent media with arbitrary degrees of anisotropy. An independent theoretical confirmation has been lacking ...
    • Electronic-reconstruction-enhanced hydrogen evolution catalysis in oxide polymorphs 

      Li, Yangyang; Yu, Zhi Gen; Wang, Ling; Weng, Yakui; Tang, Chi Sin; Yin, Xinmao; Han, Kun; Wu, Haijun; Yu, Xiaojiang; Wong, Lai Mun; Wan, Dongyang; Wang, Xiao Renshaw; Chai, Jianwei; Zhang, Yong-Wei; Wang, Shijie; Wang, John; Wee, Andrew T. S.; Breese, Mark B. H.; Pennycook, Stephen J.; Venkatesan, Thirumalai; Dong, Shuai; Xue, Jun Min; Chen, Jingsheng (2019)
      Transition metal oxides exhibit strong structure-property correlations, which has been extensively investigated and utilized for achieving efficient oxygen electrocatalysts. However, high-performance oxide-based electrocatalysts ...
    • Ultrafast structural rearrangement dynamics induced by the photodetachment of phenoxide in aqueous solution 

      Debnath, Tushar; Muhammad Shafiq Mohd Yusof; Low, Pei Jiang; Loh, Zhi-Heng (2019)
      The elementary processes that accompany the interaction of ionizing radiation with biologically relevant molecules are of fundamental importance. However, the ultrafast structural rearrangement dynamics induced by the ...
    • Interface-based tuning of Rashba spin-orbit interaction in asymmetric oxide heterostructures with 3d electrons 

      Lin, Weinan; Li, Lei; Doğan, Fatih; Li, Changjian; Rotella, Hélène; Yu, Xiaojiang; Zhang, Bangmin; Li, Yangyang; Lew, Wen Siang; Wang, Shijie; Prellier, Wilfrid; Pennycook, Stephen J.; Chen, Jingsheng; Zhong, Zhicheng; Manchon, Aurelien; Wu, Tom (2019)
      The Rashba effect plays important roles in emerging quantum materials physics and potential spintronic applications, entailing both the spin orbit interaction (SOI) and broken inversion symmetry. In this work, we devise ...
    • Quantum interference of multi-photon at beam splitter with application in measurement-device-independent quantum key distribution 

      Pradana, Andri; Chew, Lock Yue (2019)
      Despite the relative simplicity of the traditional Hong–Ou–Mandel (HOM) interferometer setup, it is of fundamental interest in various quantum optics applications and quantum information technologies. In this article, ...
    • Angle-resolved broadband ferromagnetic resonance apparatus enabled through a spring-loaded sample mounting manipulator 

      He, Shikun; Qin, Qing; Zhou, Tiejun; Panagopoulos, Christos (2019)
      Broadband ferromagnetic resonance is a useful technique to determine the magnetic anisotropy and study the magnetization dynamics of magnetic thin films. We report a spring-loaded sample loading manipulator for reliable ...
    • Feature issue introduction : halide perovskites for optoelectronics 

      White, Thomas P.; Deleporte, Emmanuelle; Sum, Tze-Chien (2018)
      This joint Optics Express and Optical Materials Express feature issue presents a collection of nine papers on the topic of halide perovskites for optoelectronics. Perovskite materials have attracted significant attention ...
    • The evolution of skyrmions in Ir/Fe/Co/Pt multilayers and their topological Hall signature 

      Raju, Masapogu; Yagil, A.; Soumyanarayanan, Anjan; Tan, Anthony K. C.; Almoalem, A.; Ma, Fusheng; Auslaender, O. M.; Panagopoulos, Christos (2019)
      The topological Hall effect (THE) is the Hall response to an emergent magnetic field, a manifestation of the skyrmion Berry-phase. As the magnitude of THE in magnetic multilayers is an open question, it is imperative to ...
    • Photonic anomalous quantum hall effect 

      Mittal, Sunil; Orre, Venkata Vikram; Leykam, Daniel; Chong, Yi Dong; Mohammad Hafezi (2019)
      We experimentally realize a photonic analogue of the anomalous quantum Hall insulator using a two-dimensional (2D) array of coupled ring resonators. Similar to the Haldane model, our 2D array is translation invariant, has ...
    • Realization of an acoustic third-order topological insulator 

      Xue, Haoran; Yang, Yahui; Liu, Guigeng; Gao, Fei; Chong, Yidong; Zhang, Baile (2019)
      The recent discovery of higher-order topological insulators (TIs) has opened new possibilities in the search for novel topological materials and metamaterials. Second-order TIs have been implemented in two-dimensional (2D) ...
    • Optical gating of resonance fluorescence from a single germanium vacancy color center in diamond 

      Chen, Disheng; Mu, Zhao; Zhou, Yu; Fröch, Johannes E.; Rasmit, Abdullah; Diederichs, Carole; Zheludev, Nikolay; Aharonovich, Igor; Gao, Wei-bo (2019)
      Scalable quantum photonic networks require coherent excitation of quantum emitters. However, many solid-state systems can undergo a transition to a dark shelving state that inhibits the resonance fluorescence. Here, we ...
    • Novel paradigm for integrated photonics circuits : transient interconnection network 

      Fazio, Eugenio; Belardini, Alessandro; Bastiani, Lorenzo; Alonzo, Massimo; Chauvet, Mathieu; Zheludev, Nikolay I.; Soci, Cesare (2017)
      Self-confined beams and spatial solitons were always investigated for a purely academic point of view, describing their formation and cross-interaction. We propose a novel paradigm for integrated photonics circuits based ...
    • The QCD mass gap and quark deconfinement scales as mass bounds in strong gravity 

      Burikham, Piyabut; Harko, Tiberiu; Lake, Matthew James (2017)
      Though not a part of mainstream physics, Salam’s theory of strong gravity remains a viable effective model for the description of strong interactions in the gauge singlet sector of QCD, capable of producing particle ...
    • Does space-time torsion determine the minimum mass of gravitating particles? 

      Böhmer, Christian G.; Burikham, Piyabut; Harko, Tiberiu; Lake, Matthew James (2018)
      We derive upper and lower limits for the mass–radius ratio of spin-fluid spheres in Einstein–Cartan theory, with matter satisfying a linear barotropic equation of state, and in the presence of a cosmological constant. ...
    • Plasmonic toroidal excitation with engineering metamaterials 

      Wu, Pin Chieh; Hsiao, Hui-Hsin; Liao, Chun Yen; Chung, Tsung Lin; Wu, Pei Ru; Savinov, Vassili; Zheludev, Nikolay I.; Tsai, Din Ping (2017)
      Natural toroidal molecules, such as biomolecules and proteins, possess toroidal dipole moments that are hard to be detected, which leads to extensive studies of artificial toroidal materials. Recently, toroidal metamaterials ...
    • Superconducting atom chips : towards quantum hybridization 

      Hufnagel, Christoph; Landra, Alessandro; Lim, Chin Chean; Yu, Deshui; Dumke, Rainer (2017)
      Atomic-superconducting hybrid systems are of particular interest as they are combining the long coherence times of ultracold atoms and fast gate operation times of superconducting circuits. Here we discuss an experimental ...
    • Cryptography in coherent optical information networks using dissipative metamaterial gates 

      Xomalis, Angelos; Demirtzioglou, Iosif; Jung, Yongmin; Plum, Eric; Lacava, Cosimo; Petropoulos, Periklis; Richardson, David J.; Zheludev, Nikolay I. (2019)
      All-optical encryption of information in fibre telecommunication networks offers lower complexity and far higher data rates than electronic encryption can deliver. However, existing optical layer encryption methods, which ...
    • Practical collision attacks against round-reduced SHA-3 

      Guo, Jian; Liao, Guohong; Liu, Guozhen; Liu, Meicheng; Qiao, Kexin; Song, Ling (2019)
      The Keccak hash function is the winner of the SHA-3 competition (2008–2012) and became the SHA-3 standard of NIST in 2015. In this paper, we focus on practical collision attacks against round-reduced SHA-3 and some Keccak ...
    • Nitrogen plasma treatment in two-step temperature deposited FePt bilayer media 

      Dutta, Tanmay; Neeraj, Dwivedi; Saifullah, M.S.M.; Yang, Hyunsoo; Bhatia, C.S.; Piramanayagam, S.N. (2018)
      Tailoring writability and obtaining better signal-to-noise ratio performance by tuning the magnetic and microstructural properties of FePt media is of great interest in the bid to achieve high areal densities for next ...