Silver nanorod arrays for photocathode applications

Journal Article · Wed Oct 16 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4825262· OSTI ID:1115830

Vilayurganapathy, Subramanian ^[1]; Nandasiri, Manjula I. ^[1]; Joly, Alan G. ^[2]; El-Khoury, Patrick Z. ^[2]; Varga, Tamas ^[2]; Coffey, Greg W. ^[2]; Schwenzer, Birgit ^[2]; Pandey, Archana ^[2]; Kayani, Asghar N. ^[3]; Hess, Wayne P. ^[2]; Thevuthasan, Suntharampillai ^[2]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Western Michigan Univ., Kalamazoo MI (United States)
2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
3. Western Michigan Univ., Kalamazoo MI (United States)

In this study, we explore the possibility of using plasmonic Ag nanorod arrays featuring enhanced photoemission as high-brightness photocathode material. Silver nanorod arrays are synthesized by the DC electrodeposition method and their dimensionality, uniformity, crystallinity and oxide/impurity content are characterized. These Ag nanorod arrays exhibit greatly enhanced two-photon photoemission under 400 nm femtosecond pulsed laser excitation. Plasmonic field enhancement in the array produces photoemission hot spots that are mapped using photoemission electron microscopy (PEEM). The relative photoemission enhancement of nanorod array hot spots relative to that of a flat Ag thin film is found to range between 102 and 3 x 10³.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1115830
• Report Number(s): PNNL-SA-97756; 47670
• Journal Information: Applied Physics Letters, Vol. 103, Issue 16; ISSN 0003-6951
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
30 DIRECT ENERGY CONVERSION
Environmental Molecular Sciences Laboratory