Novel field-assisted photocathodes with nanoscale grating antennas

Niigaki, Minoru; Hirohata, Toru; Akahori, Wataru; Kan, Hirofumi

doi:doi:10.1116/1.3271251

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Journal of Vacuum Science & Technology B / Volume 28 / Issue 2 / PAPERS FROM THE 22nd INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE / Applications

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J. Vac. Sci. Technol. B 28, C2D1 (2010); http://dx.doi.org/10.1116/1.3271251 (4 pages)

Novel field-assisted photocathodes with nanoscale grating antennas

Minoru Niigaki, Toru Hirohata, Wataru Akahori, and Hirofumi Kan

Central Research Laboratory, Hamamatsu Photonics K.K., 5000 Hirakuchi, Hamakita-ku, Hamamatsu, Shizuoka 434-8601, Japan

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(Published online 19 March 2010)

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The authors present novel field-assisted photocathodes exhibiting an enhanced photoemission by nanoscale metallic grating antennas fabricated on the surface. The antennas serve to guide the incident photon fluxes into the nanoscale apertures of the photocathodes by the surface plasmon resonance. They demonstrate the comparisons of the spectral response characteristics between the calculated and experimental results. The nanoscale antennas would be utilized to realize a photocathode with extremely low dark current especially in the near infrared region.

ACKNOWLEDGMENTS

The authors wish to thank M. Yamada and Y. Negi for their technical assistance in photomultiplier tube fabrication. They also thank M. Yamanishi for fruitful discussions and critical reading of the manuscript.

Article Outline

INTRODUCTION
EXPERIMENT
RESULTS AND DISCUSSION
CONCLUSION

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KEYWORDS and PACS

Keywords

dark conductivity, photocathodes, surface plasmon resonance, InP, InGaAs, Al, metal

PACS

85.60.Ha

Photomultipliers; phototubes and photocathodes

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History

Received 10 September 2009
Accepted 29 October 2009
Published online 19 March 2010

Digital Object Identifier

http://dx.doi.org/10.1116/1.3271251

PUBLICATION DATA

ISSN

1071-1023 (print)

1520-8567 (online)

Publisher

American Vacuum Society

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