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  • 1.
    Qiu, Min
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Xiao, Sanshui
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Optical microcavity based on zero-group-velocity surface modes in photonic crystals - art. no. 6020192005In: Optoelectronic Materials and Devices for Optical Communications / [ed] Tsuji, S; Buus, J; Luo, Y, BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2005, Vol. 6020, p. 2019-2019Conference paper (Refereed)
    Abstract [en]

    Optical microcavities based on zero-aroup-velocity surface modes in photonic crystals are studied. It is shown that high quality factors can be easily for such microcavities in photonic crystals. With increasing of the cavity length, the quality factor is gradually enhanced and the resonant frequency converges to that of the zero-group-velocity surface mode in the photonic crystals. Different with other microcavities mentioned in the literature, microcavities proposed in this paper can be considered as open cavities in the sense that one of the in-plane boundaries is exposed to air.

  • 2.
    Ruan, Zhichao
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Qui, Min
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Xiao, Sanshui
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    He, Sailing
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Thylén, Lars
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Coupling between plane waves and Bloch waves in photonic crystals with negative refraction2005In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 71, no 4, p. 045111-Article in journal (Refereed)
    Abstract [en]

    A comprehensive analysis of the coupling coefficients between plane waves in conventional dielectric media and Bloch waves of photonic crystals with effective negative refractions is performed by the layer Korringa-Kohn-Rostoker method. Employing the infinite layers refraction operator, semi-infinite size photonic crystals are considered. Some special coupling properties are discussed. In particular, the strong angular dependence of coupling coefficients is found even for an interface between air (n=1) and a photonic crystal with effective refractive index (n(eff)=-1). Thus, a negative refractive index defined by the radius of a circular equal-frequency contour does not guarantee an isotropic behavior.

  • 3.
    Xiao, Sanshui
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Liu, Liu
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Qin, Min
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Channel drop filters realized in a surface plasmon-polaritons metal2006In: Optoeletronic Materials and Devices, Pts 1 and 2 / [ed] Lee, YH; Koyama, F; Luo, Y, 2006, Vol. 6352, p. U23-U30Conference paper (Refereed)
    Abstract [en]

    Channel drop filters with ring/disk resonators in a plasmon-polaritons metal are studied. It shows that light can be efficiently dropped. Results obtained by the finite difference time domain method are consistent with those from the coupled mode theory. It also shows, without considering the loss of the metal, that the quality factor for the channel drop system can be very high. The quality factor decreases significantly if we take into account the loss, which also leads to a weak drop efficiency.

  • 4.
    Xiao, Sanshui
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Qiu, Min
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    High-Q microcavities realized in a circular photonic crystal slab2005In: Photonics and Nanostructures-Fundamentals and Applications, ISSN 1569-4410, Vol. 3, no 2-3, p. 134-138Article in journal (Refereed)
    Abstract [en]

    A series of microcavities in circular photonic crystal slabs are studied in this paper. It is shown that high quality factors can be obtained for such microcavities. For a cavity with three inner layers of air holes missing, Q factor larger than 105 can be obtained. It is also worth noting there exists resonant modes with high quality factors, even for the defect-free circular photonic crystal slab, due to gradual change of the average effective index.

  • 5.
    Xiao, Sanshui
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Qiu, Min
    KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
    Ruan, Z. C.
    He, Sailing
    KTH, Superseded Departments, Electromagnetic Theory.
    Influence of the surface termination to the point imaging by a photonic crystal slab with negative refraction2004In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 85, no 19, p. 4269-4271Article in journal (Refereed)
    Abstract [en]

    Point imaging by a photonic crystal slab due to the negative refraction is studied theoretically. By investigating the transfer function of the imaging system, the influence of the surface termination to the imaging quality is analyzed. It is shown that an appropriate surface termination is important for obtaining an image of good quality.

  • 6.
    Zhang, Ziyang
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Dainese, Matteo
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Wosinski, Lech
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Swillo, Marcin
    PhoXtal Communications AB.
    Xiao, Sanshui
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Qiu, Min
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Experimental demonstration of 2D photonic crystal surface cavity in amorphous silicon on silica structure2007In: OFC/NFOEC 2007 - Optical Fiber Communication and the National Fiber Optic Engineers Conference 2007, 2007, p. 4348573-Conference paper (Refereed)
    Abstract [en]

    Design, fabrication, and characterization of an optical filter based on side coupling between silicon wire waveguide and photonic crystal surface mode cavity in silicon on silica structure is presented for the 1550 nm wavelength spectral region.

  • 7.
    Zhang, Ziyang
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Dainese, Matteo
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Wosinski, Lech
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Xiao, Sanshui
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Qiu, Min
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Swillo, Marcin
    PhoXtal Communications AB.
    Andersson, Ulf
    KTH, School of Computer Science and Communication (CSC), Centres, Centre for High Performance Computing, PDC. KTH, School of Computer Science and Communication (CSC).
    Optical filter based on two-dimensional photonic crystal surface-mode cavity in amorphous silicon-on-silica structure2007In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 90, no 4, p. 041108-Article in journal (Refereed)
    Abstract [en]

    An optical filter based on side coupling between silicon wire waveguide and two-dimensional photonic crystal surface-mode cavity is presented. The design is optimized numerically by parallel three-dimensional finite-different time-domain simulations. The device is then fabricated on amorphous silicon-on-silica structure. The drop wavelength is observed around 1580 nm. The extinction ratio of the filter is larger than 10 dB and the intrinsic quality factor of the surface-mode cavity is approximately 2000.

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