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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 13 — Dec. 2, 2009

Near-field nanoimaging by nanoscale photodetector array

Boyang Liu, Ki Young Kim, Yicheng Lai, Xiangyu Li, Fang Ou, and Seng-Tiong Ho  »View Author Affiliations

Optics Letters, Vol. 34, Issue 21, pp. 3367-3369 (2009)

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We report a demonstration of near-field nanoimaging using nanoscale photodetector (NPD) array. The NPD array has detector pixels with subwavelength dimension and is capable of pixel addressing. An active-media finite-difference time-domain simulation of the NPD array shows an imaging resolution of 150 nm for 1.55 μ m light. Additionally, we demonstrate the realization and characterization of the NPD array. The smallest NPD array obtained has 100-nm-wide pixels with 100 nm spacing. A responsivity of 0.28 A W at 1.31 μ m and 3.3 V bias is registered for a 2 × 2 NPD array pixel. The corresponding photocurrent is 735 nA with a dark current of 0.483 nA . Using near-field photocurrent microscopy, an imaging resolution of 390 nm has been demonstrated.

© 2009 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(040.5160) Detectors : Photodetectors
(250.0040) Optoelectronics : Detectors

ToC Category:

Original Manuscript: June 30, 2009
Revised Manuscript: September 27, 2009
Manuscript Accepted: October 2, 2009
Published: October 28, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Boyang Liu, Ki Young Kim, Yicheng Lai, Xiangyu Li, Fang Ou, and Seng-Tiong Ho, "Near-field nanoimaging by nanoscale photodetector array," Opt. Lett. 34, 3367-3369 (2009)

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