Complex refractive index variation in proton-damaged diamond

S. Lagomarsino, P. Olivero, S. Calusi, D. Gatto Monticone, L. Giuntini, M. Massi, S. Sciortino, A. Sytchkova, A. Sordini, M. Vannoni

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An accurate control of the optical properties of single crystal diamond during microfabrication processes such as ion implantation plays a crucial role in the engineering of integrated photonic devices. In this work we present a systematic study of the variation of both real and imaginary parts of the refractive index of single crystal diamondwhen damaged with 2 and 3 MeV protons at low-medium fluences (range: 1015 - 1017 cm-2). After implanting in 125 × 125 μm2 areas with a scanning ion microbeamthe variation of optical pathlength of the implanted regions was measured with laser interferometric microscopywhile their optical transmission was studied using a spectrometric set-up with micrometric spatial resolution. On the basis of a model taking into account the strongly non-uniform damage profile in the bulk samplethe variation of the complex refractive index as a function of damage density was evaluated. © 2012 Optical Society of America.
Original languageEnglish
Pages (from-to)19382 - 19394
Number of pages13
JournalOptics Express
Issue number17
Publication statusPublished - 13 Aug 2012


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Lagomarsino, S., Olivero, P., Calusi, S., Monticone, D. G., Giuntini, L., Massi, M., ... Vannoni, M. (2012). Complex refractive index variation in proton-damaged diamond. Optics Express, 20(17), 19382 - 19394.