Optical transmission through double-layer, laterally shifted metallic subwavelength hole arrays

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Optics Letters

DOI:https://doi.org/10.1364/OL.35.002124· OSTI ID:982393

Marset, zsolt ^[1]; Hang, z. h. ^[2]; Chan, C. T. ^[2]; Kravchenko, Ivan I ^[3]; Bower, J. E. ^[4]; Cirelli, R. A. ^[4]; Klemens, F. ^[4]; Mansfield, W. M. ^[4]; Miner, J. F. ^[4]; Pai, C. S. ^[4]; Chan, Ho Bun ^[1]

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1. University of Florida, Gainesville
2. Hong Kong University of Science & Technology
3. ORNL
4. Lucent Technologies/Bell Laboratories

We measure the transmission of infra-red radiation through double-layer metal lms with periodic arrays of subwavelength holes. When the two metal lms are placed in su ciently close proximity, two types of transmission resonances emerge. For the surface plasmon mode, the electromagnetic eld is concentrated on the outer surface of the entire metallic layer stack. In contrast, for the guided mode the eld is con ned to the gap between the two metal layers. Our measurements indicate that as the two layers are laterally shifted from perfect alignment, the peak transmission frequency of the guided mode decreases signi cantly, while that of the surface plasmon mode remains largely unchanged, in agreement with numerical calculations.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 982393
• Journal Information: Optics Letters, Journal Name: Optics Letters Journal Issue: 13 Vol. 35; ISSN 1539-4794; ISSN 0146-9592
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALIGNMENT
PLASMONS
RADIATIONS