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홍성철,박규환,Ch. Lienau,김대식,J. Kim,J. W. Park,K. H. Yoo,. H. Han,V. Malyarchuk,Y. C. Yoon 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
We study emission patterns in periodic nano-hole arrays perforated in a metal film. In the nearfield region, higher order multiple components of diffraction interfere with each other to generate complicated spatial patterns. These patterns simplify to a sinusoidal one in the intermediate region and become either homogeneous or sinusoidal in the far-field region, depending on whether the excitation wavelength is larger or smaller than the lattice constant. For an incident wavelength much smaller than the lattice constant, complicated patterns can survive into the far-field. Detailed analytic and numerical studies are presented, which show good qualitative agreement with experiment.