The University of Southampton
University of Southampton Institutional Repository

Ion-implanted lanthanum fluoride waveguides

Huang, X., Chandler, P.J., Townsend, P.D. and Rutt, H.N. (1997) Ion-implanted lanthanum fluoride waveguides Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 127-128, pp. 533-536.

Record type: Article


The effects of He+ and H+ implantation into LaF3 substrates have been investigated at both room temperature and 77 K. At room temperature the surface of the samples becomes black, possibly due to chemical reduction effects, but at low temperature the crystals remain clear and a refractive index change is observed which produces a surface waveguide. The dark mode spectra of these guides have been recorded using the prism coupling technique, and their refractive index profiles have been deduced from the spacing of these modes. The ion implantation produces a thin optical barrier layer of low refractive index at the end of the ion range. This paper discusses the use of multiple-energy implantation to produce a broad optical barrier in order to reduce the tunnelling losses of the guides, and subsequent thermal annealing to reduce absorption and scattering losses caused by colour centre formation in the electronic stopping surface region of the guides. It is concluded that either single- or multiple-energy He+ implants can be ideally used to form waveguides, for applications in the blue/UV or red/IR wavelength regions, respectively, with losses of a few dB/cm.

PDF 2112.pdf - Accepted Manuscript
Download (346kB)

More information

Published date: May 1997


Local EPrints ID: 77763
ISSN: 0168-583X
PURE UUID: e323863c-73f8-4f7f-88b6-6b0202f6ec1a

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Oct 2017 13:05

Export record


Author: X. Huang
Author: P.J. Chandler
Author: P.D. Townsend
Author: H.N. Rutt

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.