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Träfflista för sökning "WFRF:(Wei Wei) srt2:(2000-2004)"

Sökning: WFRF:(Wei Wei) > (2000-2004)

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  • Wei, C. H., et al. (författare)
  • Polarization dependence of light intensity distribution from nanometer metallic slits
  • 2003
  • Ingår i: CLEO/Pacific Rim 2003 - 5th Pacific Rim Conference on Lasers and Electro-Optics : Photonics Lights Innovation, from Nano-Structures and Devices to Systems and Networks, Proceedings - Photonics Lights Innovation, from Nano-Structures and Devices to Systems and Networks, Proceedings. - 0780377664 ; 2
  • Konferensbidrag (refereegranskat)abstract
    • In this work, the near-field and far-field electric magnetic (EM) wave distributions of metallic slits was observed using tapered fiber probe and modelled using finite difference time domain (FDTD) computer simulations. The EM wave field distribution from rectangular slits with widths 100 nm, 300 nm, and 500 nm was mapped with excitation wavelength λ = 532 nm. λ/2 can be considered a characteristic length for the problem. From the experiments and FDTD simulation, E⊥ wave is found to be governed by the surface plasmon wave (SPW) which results in ill near field pattern and cannot be confined in the slit. On the contrary, E∥ wave has a well-shaped field distribution and can be confined in the slit.
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  • Wei, CH, et al. (författare)
  • Polarization dependence of light intensity distribution near a nanometric aluminum slit
  • 2004
  • Ingår i: Optical Society of America. Journal B: Optical Physics. - 0740-3224. ; 21:5, s. 1005-1012
  • Tidskriftsartikel (refereegranskat)abstract
    • The near-field radiation pattern of a long thin slit (with a width much smaller than the excitation wavelength) in a uniform aluminum surface was measured and modeled by numerical computation. In particular, the interplay between the incident light polarization and the slit width is found to play an essential role in the near-field profile on the back side of the nanoslits. Two-dimensional finite-difference time-domain computer simulations were performed to calculate the near-field intensity profile for different slit widths and metal thicknesses. This method will allow the optimization of three-dimensional near-field radiation patterns for a variety of near-field molecular scanning schemes. (C) 2004 Optical Society of America.
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  • Adnane, Bouchaib, et al. (författare)
  • Mid/far-infrared detection using a MESFET with B-modulation doped Ge-dot/SiGe-well multiple stacks in the channel region
  • 2004
  • Konferensbidrag (refereegranskat)abstract
    • Multiple modulation-doped Ge-dot/SiGe-QW stack structures were grown using MBE, and processed as FET devices for mid/far infrared detection. From a non-optimized device, a broadband photoresponse has been observed in the mid-infrared range of 3-15 μm. A peak responsivity was estimated to be as high as 100 mA/W at T= 20 K. This work indicates that SiGE QD/QW structures using the lateral transport geometry can be a potential candidate for photodetectors operating in far-infrared range.
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