Subwavelength imaging of an etched fiber with an intracore Bragg grating by apertured photon scanning tunneling microscope

Din Ping Tsai, Yueh L. Chung, Andreas Othonos

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


Apertured photon scanning tunneling microscopy (APSTM) was used to image the internal structure of an etched optical fiber with an intracore Bragg grating. Direct evidence of the subwavelength periodic variation of the index of refraction along the fiber is obtained by probing evanescent field intensity modulated by the etched fiber grating structure. The images we observed suggests local non-uniformity in the grating structure. Local anomalies appear in the values of the grating spacing. The modulation of the evanescent field intensity originates from variations in the index of refraction as well as from surface structure induced by etching of the fiber.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsMehdi Vaez-Iravani
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages7
ISBN (Print)0819417319
Publication statusPublished - 6 Feb 1995
Externally publishedYes
EventScanning Probe Microscopies III - San Jose, CA, USA
Duration: 6 Feb 19957 Feb 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceScanning Probe Microscopies III
CitySan Jose, CA, USA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this