title: Nanofocusing of the free-space optical energy with plasmonic Tamm states.
abstract: To achieve extreme electromagnetic enhancement, we propose a plasmonic Tamm states (PTSs) configuration based on the metal-insulator-metal Bragg reflector, which is realized by periodically modulating the width of the insulator. Both the thick (2D) and thin (3D) structures are discussed. Through optimization performed by the impedance-based transfer matrix method and the finite difference time domain method, we find that both the electric field and magnetic field intensities can be increased by three orders of magnitude. The field-enhancement inside the PTSs configuration is not limited to extremely sharp waveguide terminal, which can greatly reduce processing difficulties.
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Linyu
authors.initials: L
authors.lastname: Niu
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Yinxiao
authors.initials: Y
authors.lastname: Xiang
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Luo
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cai
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Jiwei
authors.initials: J
authors.lastname: Qi
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Xinzheng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: The MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China.|Synergetic Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China.
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu