Red photoluminescence of gold island films
We comparatively study photoluminescence and morphology of gold films prepared with a sputtering method. The ultrathin films (⩽10 nm) efficiently emit light above 600 nm, which dramatically differs from the known emission of thick gold films. The absorption mechanism in ultrathin gold films is presu...
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| Published in: | Applied physics letters Vol. 78; no. 14; pp. 1994 - 1996 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
02-04-2001
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| Online Access: | Get full text |
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| Summary: | We comparatively study photoluminescence and morphology of gold films prepared with a sputtering method. The ultrathin films (⩽10 nm) efficiently emit light above 600 nm, which dramatically differs from the known emission of thick gold films. The absorption mechanism in ultrathin gold films is presumably contributed by their island structure promoting interacting plasmons. The collective plasmon states of island films decay radiatively, producing the extraordinary red emission observed under excitation at 488.0, 514.5, and 632.8 nm. The red photoluminescence of ultrathin films is substrate dependent, and correlates with the surface morphology analyzed by using atomic force microscopy and resistance measurements. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.1359491 |