Embedded optical micro/nano-fibers for stable devices.

We present a technique to embed silica micro and nanofibers in low-index material (Teflon) using an inexpensive and straightforward fabrication process based on spin coating. The optical properties of the silica micro/nano-fibers have been investigated when they are bare or completely or partially embedded. Optical degradation occurs in bare fibers with diameters smaller than twice the wavelength of the guided light, thus making protection through embedding necessary. Our results also show that completely embedded fibers do not degrade over a long time, while partially embedded fibers can preserve the large evanescent waves without undergoing considerable degradation, which would be further reduced or even become negligible with functional overlayers. The results represent a step forward toward the development of durable and stable devices based on optical micro/nano fibers.

[1]  Joel Villatoro,et al.  Fast detection of hydrogen with nano fiber tapers coated with ultra thin palladium layers. , 2005, Optics express.

[2]  Yu Wu,et al.  Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators. , 2009, Optics express.

[3]  D. Meschede,et al.  Ultra-sensitive surface absorption spectroscopy using sub-wavelength diameter optical fibers. , 2007, Optics express.

[4]  Gilberto Brambilla,et al.  Preservation of Micro-Optical Fibers by Embedding , 2008 .

[5]  Dan Dalacu,et al.  Nanowire coupling to photonic crystal nanocavities for single photon sources , 2007, 2007 Quantum Electronics and Laser Science Conference.

[6]  D.J. DiGiovanni,et al.  The microfiber loop resonator: theory, experiment, and application , 2006, Journal of Lightwave Technology.

[7]  Limin Tong,et al.  Supported microfiber loops for optical sensing. , 2008, Optics express.

[8]  M. Mansuripur,et al.  Evanescent field-based optical fiber sensing device for measuring the refractive index of liquids in microfluidic channels. , 2005, Optics letters.

[9]  T. A. Birks,et al.  Tapered fibres embedded in silica aerogel , 2009, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.

[10]  Limin Tong,et al.  Fast detection of humidity with a subwavelength-diameter fiber taper coated with gelatin film. , 2008, Optics express.

[11]  D Meschede,et al.  Cold-atom physics using ultrathin optical fibers: light-induced dipole forces and surface interactions. , 2007, Physical review letters.

[12]  David J. Richardson,et al.  Optical fiber nanowires and microwires: fabrication and applications , 2009 .

[13]  E.-J. Bachus,et al.  Fibre-optic micro-ring-resonator with 2 mm diameter , 1989 .

[14]  Limin Tong,et al.  Effect of Host Polymer on Microfiber Resonator , 2007, IEEE Photonics Technology Letters.

[15]  Gilberto Brambilla,et al.  An embedded optical nanowire loop resonator refractometric sensor. , 2008, Optics express.