Please use this identifier to cite or link to this item: http://repository.kln.ac.lk/handle/123456789/4001
Title: Quantum dot photodetectors with metallic diffraction grating: Surface plasmons and strong absorption enhancement
Authors: Hewageegana, P.
Apalkov, V.
Keywords: Surface plasmons; Quantum dot photodetectors
Issue Date: 2008
Publisher: Physica E: Low-dimensional Systems and Nanostructures
Abstract: We report our theoretical study of the effect of metallic diffraction grating on the sensitivity of quantum dot photodetectors in terahertz frequency. We have found that the effect of diffraction grating is much stronger for s-polarization than for p-polarization. For s-polarization the sensitivity of photodetectors can be enhanced by metallic diffraction grating by a few orders of magnitude. Due to strongly inhomogeneous distribution of electromagnetic field the quantum dots should be placed at special points, i.e. hot spots, where the field intensity is maximum.
URI: http://repository.kln.ac.lk/handle/123456789/4001
ISSN: 1386-9477
Appears in Collections:Physics

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