TY - JOUR
T1 - Compact surface fano states embedded in the continuum of waveguide arrays
AU - Weimann, Steffen
AU - Xu, Yi
AU - Keil, Robert
AU - Miroshnichenko, Andrey E.
AU - Tünnermann, Andreas
AU - Nolte, Stefan
AU - Sukhorukov, Andrey A.
AU - Szameit, Alexander
AU - Kivshar, Yuri S.
PY - 2013/12/10
Y1 - 2013/12/10
N2 - We describe theoretically and observe experimentally the formation of a surface state in a semi-infinite waveguide array with a side-coupled waveguide, designed to simultaneously achieve Fano and Fabry-Perot resonances. We demonstrate that the surface mode is compact, with all energy concentrated in a few waveguides at the edge and no field penetration beyond the side-coupled waveguide position. Furthermore, we show that by broadening the spectral band in the rest of the waveguide array it is possible to suppress exponentially localized modes, while the Fano state having the eigenvalue embedded in the continuum is preserved.
AB - We describe theoretically and observe experimentally the formation of a surface state in a semi-infinite waveguide array with a side-coupled waveguide, designed to simultaneously achieve Fano and Fabry-Perot resonances. We demonstrate that the surface mode is compact, with all energy concentrated in a few waveguides at the edge and no field penetration beyond the side-coupled waveguide position. Furthermore, we show that by broadening the spectral band in the rest of the waveguide array it is possible to suppress exponentially localized modes, while the Fano state having the eigenvalue embedded in the continuum is preserved.
UR - http://www.scopus.com/inward/record.url?scp=84890280147&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.111.240403
DO - 10.1103/PhysRevLett.111.240403
M3 - Article
SN - 0031-9007
VL - 111
JO - Physical Review Letters
JF - Physical Review Letters
IS - 24
M1 - 240403
ER -