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

Din Ping Tsai; Yueh Liang Chung; Andreas Othonos

doi:10.1117/12.205929

30 March 1995 Subwavelength imaging of an etched fiber with an intracore Bragg grating by apertured photon scanning tunneling microscope

Din Ping Tsai, Yueh Liang Chung, Andreas Othonos

Author Affiliations +

Proceedings Volume 2384, Scanning Probe Microscopies III; (1995) https://doi.org/10.1117/12.205929
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

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.

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Din Ping Tsai, Yueh Liang Chung, and Andreas Othonos "Subwavelength imaging of an etched fiber with an intracore Bragg grating by apertured photon scanning tunneling microscope", Proc. SPIE 2384, Scanning Probe Microscopies III, (30 March 1995); https://doi.org/10.1117/12.205929

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