Photonic crystal formation on optical nanofibers using femtosecond laser ablation technique

We demonstrate that thousands of periodic nano-craters are fabricated on a subwavelength-diameter tapered optical fiber, an optical nanofiber, by irradiating with just a single femtosecond laser pulse. A key aspect of the fabrication is that the nanofiber itself acts as a cylindrical lens and focuse...

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Bibliographic Details
Published in:Optics express 2013-01, Vol.21 (2), p.2480-2490
Main Authors: Nayak, K P, Hakuta, K
Format: Article
Language:English
Subjects:
Crystallization - methods
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Lasers
Molecular Imprinting - instrumentation
Nanoparticles - chemistry
Nanoparticles - radiation effects
Nanoparticles - ultrastructure
Photons
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Summary:We demonstrate that thousands of periodic nano-craters are fabricated on a subwavelength-diameter tapered optical fiber, an optical nanofiber, by irradiating with just a single femtosecond laser pulse. A key aspect of the fabrication is that the nanofiber itself acts as a cylindrical lens and focuses the femtosecond laser beam on its shadow surface. We also demonstrate that the periodic nano-crater array on the nanofiber shows polarization dependent fiber Bragg grating (FBG) characteristics. Such FBG structures on the nanofiber may act as a 1-D photonic crystal due to the strong transverse and longitudinal confinement of the field.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.21.002480