Near-field microscope probe for far infrared time domain measurements

O. Mitrofanov, I. Brener, M. C. Wanke, R. R. Ruel, J. D. Wynn, A. J. Bruce, J. Federici

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

A near-field probe fabrication technique for far-infrared frequencies based on photoconducting antennas is developed. A subwavelength-size field source is accomplished by means of an aperture and protruding high refractive index tip. The near-field probe is tested by using free space traveling electromagnetic pulses with a broadband spectrum in the range of 0.3-1.5 THz. A spatial resolution of 60 μm is achieved for a 50 μm aperture. The described probe may be used for near-field transmission microscopy in illumination and collection modes. Resolution may be further improved by means of a smaller aperture.

Original languageEnglish (US)
Pages (from-to)591-593
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number4
DOIs
StatePublished - Jul 24 2000

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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