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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 11 — Jun. 1, 2009
  • pp: 1675–1677

Solar-blind deep-ultraviolet photodetectors based on an La Al O 3 single crystal

Jie Xing, Erjia Guo, Kui-juan Jin, Huibin Lu, Juan Wen, and Guozhen Yang  »View Author Affiliations

Optics Letters, Vol. 34, Issue 11, pp. 1675-1677 (2009)

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Solar-blind deep-ultraviolet (DUV) photoconductive detectors based on an La Al O 3 (LAO) single crystal with interdigitated electrodes are reported. The LAO detectors show a high sensitivity to DUV light with wavelengths less than 210 nm , and the DUV/UV (200 versus 290 nm ) contrast ratio is more than 2 orders of magnitude. The photocurrent responsivity of LAO detector reaches 71.8 mA W at 200 nm at 10 V bias, and the corresponding quantum efficiency η is 44.6%. The noise current under sunlight at midday outdoors is only 77 pA . The experimental results indicate that the LAO detectors have attractive potential applications in DUV detection.

© 2009 Optical Society of America

OCIS Codes
(040.5150) Detectors : Photoconductivity
(040.5160) Detectors : Photodetectors
(040.7190) Detectors : Ultraviolet

ToC Category:

Original Manuscript: January 13, 2009
Revised Manuscript: April 17, 2009
Manuscript Accepted: April 28, 2009
Published: May 27, 2009

Jie Xing, Erjia Guo, Kui-juan Jin, Huibin Lu, Juan Wen, and Guozhen Yang, "Solar-blind deep-ultraviolet photodetectors based on an LaAlO3 single crystal," Opt. Lett. 34, 1675-1677 (2009)

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