S. M. Wang

Shanghai Institute of Microsystem And Information Technology, Shanghai, Shanghai Shi, China

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Publications (157)298.18 Total impact

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    ABSTRACT: It has been proved that surface plasmon polariton (SPP) can well conserve and transmit the quantum nature of entangled photons. Therefore, further utilization and manipulation of such quantum nature of SPP in a plasmonic chip will be the next task for scientists in this field. In quantum logic circuits, the controlled-NOT (CNOT) gate is the key building block. Here, we implement the first plasmonic quantum CNOT gate with several-micrometer footprint by utilizing a single polarization-dependent beam-splitter (PDBS) fabricated on the dielectric-loaded SPP waveguide (DLSPPW). The quantum logic function of the CNOT gate is characterized by the truth table with an average fidelity of. Its entangling ability to transform a separable state into an entangled state is demonstrated with the visibilities of and for non-orthogonal bases. The DLSPPW based CNOT gate is considered to have good integratability and scalability, which will pave a new way for quantum information science.
    08/2014;
  • Materials Letters 07/2014; 126:71–74. · 2.27 Impact Factor
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    Q Q Cheng, T Li, L Li, S M Wang, S N Zhu
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    ABSTRACT: A mode division multiplexer (MDM) based on in-plane diffractions is experimentally demonstrated in a polymer-loaded plasmonic planar waveguide. Three guided modes (TM<sub>1</sub>, TE<sub>1</sub>, and TM<sub>2</sub>) were well demultiplexed by a focusing design with a focal length of about 40 μm, which are clearly distinguished by the polarization control. The experimental results well reproduced the theoretical design and calculation. Moreover, the demultiplexed focal spots directly reflect the different modes, by which a mode diagram of the dielectric-loaded planar waveguide was vividly mapped out by varying the polymer layer thickness. In this regard, the proposed device may not only serve as a MDM for the integrated optics but can also provide a new strategy in analyzing the guided modes.
    Optics Letters 07/2014; 39(13):3900-3902. · 3.39 Impact Factor
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    ABSTRACT: Surface plasmon polariton (SPP) as a bounded mode on a metal/dielectric interface intrinsically has a definite transverse magnetic (TM) polarization that usually lacks further manipulations. However, the in-plane longitudinal components of SPP field can produce versatile polarization states when two orthogonal propagating SPP interfere with each other. Here, we demonstrated a plasmonic polarization router by designing appropriate nanohole arrays that can selectively scatter the interfered SPP fields to desired light beams. It is well proved that our device is able to reconfigure a certain input polarization to all kinds of states with respect to a scattered light. Accompanied with a composite phase modulation by diffractions, multiple focusing beams with different polarization states are simultaneously achieved, promising the possibility in polarization multiplexing and related signal processing. Our design offers a new route for achieving full control of the optical polarizations as well as the optical spin-orbital interactions.
    05/2014;
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    ABSTRACT: Surface plasmon polariton (SPP) as a bounded mode on a metal/dielectric interface intrinsically has a definite transverse magnetic (TM) polarization that usually lacks further manipulations. However, the in-plane longitudinal components of SPP field can produce versatile polarization states when two orthogonal propagating SPP interfere with each other. Here, we demonstrated a plasmonic polarization router by designing appropriate nanohole arrays that can selectively scatter the interfered SPP fields to desired light beams. It is well proved that our device is able to reconfigure a certain input polarization to all kinds of states with respect to a scattered light. Accompanied with a composite phase modulation by diffractions, multiple focusing beams with different polarization states are simultaneously achieved, promising the possibility in polarization multiplexing and related signal processing. Our design offers a new route for achieving full control of the optical polarizations as well as the optical spin-orbital interactions.
    04/2014;
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    ABSTRACT: InPBi was predicted to be the most robust infrared optoelectronic material but also the most difficult to synthesize within In-VBi (V = P, As and Sb) 25 years ago. We report the first successful growth of InPBi single crystals with Bi concentration far beyond the doping level by gas source molecular beam epitaxy. The InPBi thin films reveal excellent surface, structural and optical qualities making it a promising new III-V compound family member for heterostructures. The Bi concentration is found to be 2.4 ± 0.4% with 94 ± 5% Bi atoms at substitutional sites. Optical absorption indicates a band gap of 1.23 eV at room temperature while photoluminescence shows unexpectedly strong and broad light emission at 1.4-2.7 μm which can't be explained by the existing theory.
    Scientific reports. 01/2014; 4:5449.
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    ABSTRACT: A theoretical investigation on explanation of the composition profile in triangular and hexagonal cross-sections of InGaN/GaN core–shell nanowires is presented by combining the finite elements method (FEM) and method of moving asymptotes (MMA) in the framework of thermodynamics. Our models can account for strain effect on indium composition. In both models, the maximum indium content through segregation arises either at the side length or at the corner of the InGaN shell. The simulated results are found in good agreement with those of experimental data, thus providing a good guidance for the growth of high indium concentration of InGaN/GaN core–shell nanowires.
    Solid State Communications 01/2014; 178:1–6. · 1.53 Impact Factor
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    ABSTRACT: We propose a novel semiconductor compatible path for nano-graphene synthesis using precursors containing C-Br bonding and liquid catalyst. The unique combination of CBr4 as precursor and Ga as catalyst leads to efficient C precipitation at a synthesis temperature of 200°C or lower. The non-wetting nature of liquid Ga on tested substrates limits nano-scale graphene to form on Ga droplets and substrate surfaces at low synthesis temperatures of T ≤ 450°C and at droplet/substrate interfaces by C diffusion via droplet edges when T ≥ 400°C. Good quality interface nano-graphene is demonstrated and the quality can be further improved by optimization of synthesis conditions and proper selection of substrate type and orientation. The proposed method provides a scalable and transfer-free route to synthesize graphene/semiconductor heterostructures, graphene quantum dots as well as patterned graphene nano-structures at a medium temperature range of 400-700°C suitable for most important elementary and compound semiconductors.
    Scientific Reports 01/2014; 4:4653. · 5.08 Impact Factor
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    ABSTRACT: Nowadays, the quantum information processing has been carrying out in variety of solid state systems, such as superconductors, dielectrics, and metallic nano-structures. Here, we investigated the quantum properties of magnetic resonance in a two-dimensional metamaterial with the split-hole resonator structure. The sample was placed in path of entangled photons produced from spontaneous parametric down-conversion process, and a two-photon interference was performed. Such a two-dimensional metamaterial was able to convert photons into magnetic resonances, and reradiate as photons at the other side. A Hong-Ou-Mandel dip with a visibility of 89.4 ± 6.0 % was explicitly observed, which indicated that the magnetic resonance do own a quantum nature. This will be useful for future researches at the interface between metamaterials and quantum information processing.
    Quantum Information Processing 02/2013; 12(2). · 1.75 Impact Factor
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    ABSTRACT: A first-principles study has been performed to evaluate the electronic structure and thermoelectric properties of Bi2(Te1-xSex)3 compound. The transport coefficients are then calculated within the semiclassical Boltzmann theory, and further evaluated as a function of chemical potential assuming a constant relaxation time and an averaged thermal conductivity. Our theoretical calculations show that the ZT value is 1.43 for Bi2(Te1−xSex)3 system, and it agrees well with previous experimental data.
    Solid State Communications 02/2013; 155:34–39. · 1.53 Impact Factor
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    L. Li, T. Li, S. M. Wang, S. N. Zhu
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    ABSTRACT: We worked out a new group of collimated plasmon beams by the means of in-plane diffraction with symmetric phase modulation. As the phase type changes from 1.8 to 1.0, the beam undergoes an interesting evolution from focusing to a straight line. Upon this, an intuitive diagram was proposed to elucidate the beam nature and answer the question of whether they are nondiffracting or linear focusing. Based on this diagram, we further achieved a highly designable scheme to modulate the beam intensity (e.g., “lossless” plasmon). Our finding holds remarkable generality and flexibility in beam engineering and would inspire more intriguing photonic designs.
    Physical Review Letters 01/2013; · 7.73 Impact Factor
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    ABSTRACT: Photoluminescence (PL) measurements are performed on one GaSb/AlGaSb single-quantum-well (SQW) sample and two dilute-bismuth (Bi) GaSb/AlGaSb SQW samples grown at 360 and 380 °C, at low temperatures and under magnetic fields. Bimodal PL features are identified in the dilute-Bi samples, and to be accompanied by abnormal PL blueshift in the sample grown at 360 °C. The bimodal PL features are found to be from similar origins of band-to-band transition by magneto-PL evolution. Analysis indicates that the phenomenon can be well interpreted by the joint effect of interfacial large-lateral-scale islands and Al/Ga interdiffusion due to Bi incorporation. The interdiffusion introduces about 1-monolayer shrinkage to the effective quantum-well thickness, which is similar to the interfacial islands height, and the both together result in an unusual shallow-terrace-like interface between GaSbBi and AlGaSb. A phenomenological model is established, the Bi content of isoelectronic incorporation and the exciton reduced effective mass are estimated for the GaSbBi sample grown at 380 °C, and a value of about 21 meV/% is suggested for the bandgap bowing rate of GaSbBi. An effective routine is suggested for determining the Bi content and the depth of the shallow-terraces at interface in dilute-Bi SQW structures.
    Journal of Applied Physics 01/2013; 113(15):153505-153507. · 2.21 Impact Factor
  • 17th European Molecular Beam Epitaxy Workshop, Levi, Finland; 01/2013
  • L Li, T Li, S M Wang, S N Zhu
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    ABSTRACT: We extend the phase modulation method by in-plane diffractions from plane wave incidence to point source of surface plasmon polariton (SPP). A well-defined SPP focus is successfully realized from a point source under the diffraction by a carefully designed nanohole array, which is easy to layout in the future integrated optical circuits. With this method, the SPP Airy beam and finite plane wave are demonstrated as well, proving a general applicability of this modulation method. The proposed method and realized functions are expected of benefits for the future integration optics.
    Optics Letters 12/2012; 37(24):5091-3. · 3.39 Impact Factor
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    L. Li, T. Li, S. M. Wang, S. N. Zhu
    [Show abstract] [Hide abstract]
    ABSTRACT: We worked out a new group of collimated plasmon beams by the means of in-plane diffraction with symmetric phase modulation. As the phase type changes from 1.8 to 1.0, the beam undergoes an interesting evolution from focusing to a straight line. Upon this, an intuitive diagram was proposed to elucidate the beam nature and answer the question whether they are nondiffracting or linear focusing. Based on this diagram, we further achieved a highly designable scheme to modulate the beam intensity (e.g., 'lossless' plasmon). Our finding holds remarkable generality and flexibility in beam engineering and would inspire more intriguing photonic designs.
    11/2012;
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    ABSTRACT: We report a direct observation of guided-mode interference in polymer-loaded plasmonic waveguides by the technique of leakage radiation microscopy (LRM). Spatial beating patterns of the interferences were clearly characterized with respect to different structural parameters, and the interference properties were analyzed in detail. Besides, the capability of LRM for characterizing the multiple modes was also discussed extensively. Our finding not only offers an efficient technique in analyzing the guided modes and their interference, but also provides a definite guideline in evaluating the validity of LRM and deepens further studies on the dielectric-loaded hybrid waveguide system.
    Applied Physics Letters 10/2012; 101(17). · 3.52 Impact Factor
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    ABSTRACT: A vapor bubble is created by a weakly focused continuous-wave (CW) laser beam on the surface of a silver film. The temporal dynamics of the bubble is experimentally investigated with a tuned incident laser. The expansion and contraction rates of the vapor bubble are determined by the laser power. The diameter of the vapor bubble can be well controlled through tuning the laser power. A theory model is given to explain the underlying physics in the process. The method reported will have some interesting applications in micro-fluidics and bio-techniques.
    AIP Advances 06/2012; 2(2). · 1.35 Impact Factor
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    ABSTRACT: We demonstrate that a transformation device can be emulated using a gradient-index waveguide. The effective index of the waveguide is spatially varied by tailoring a gradient thickness dielectric waveguide. Based on this technology, we demonstrate a transformation device guiding visible light around a sharp corner, with low scattering loss and reflection loss. The experimental results are in good agreement with the numerical results.
    Optics Express 06/2012; 20(12):13006-13. · 3.55 Impact Factor
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    S.M. Wang, H. Liu, T. Li, S.N. Zhu, X. Zhang
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    ABSTRACT: The coupled magnetic plasmons (CMPs) has been investigated in an active system composed of coupled metamaterial and quantum dots. By introducing a full-quantum description of CMPs, the interaction Hamiltonian of the active system was obtained, through which the stimulated emission could be investigated. The results showed that the CMP amplification by the stimulated emission radiation could be achieved under certain conditions. This may be used to work as a CMP source in the integrated optics and nano-photonics.
    Physics Letters A 04/2012; 376(22):1812–1817. · 1.63 Impact Factor

Publication Stats

661 Citations
298.18 Total Impact Points

Institutions

  • 2014
    • Shanghai Institute of Microsystem And Information Technology
      Shanghai, Shanghai Shi, China
  • 2007–2014
    • Nanjing University
      • • Department of Physics
      • • Department of Materials Science & Engineering
      Nan-ching, Jiangsu Sheng, China
  • 1991–2013
    • Chalmers University of Technology
      • • Photonics Laboratory
      • • Department of Microtechnology and Nanoscience
      • • Department of Applied Physics
      Goeteborg, Västra Götaland, Sweden
  • 2011
    • Southeast University (China)
      Nan-ching-hsü, Jiangxi Sheng, China
  • 2007–2009
    • University of Nottingham
      • Department of Electrical and Electronic Engineering
      Nottingham, ENG, United Kingdom
  • 2008
    • Chinese Academy of Sciences
      Peping, Beijing, China
  • 1994–1995
    • Shanghai Institute of Technology
      Shanghai, Shanghai Shi, China