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X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

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Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
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Complex refractive index variation in proton-damaged diamond.

S Lagomarsino1, P Olivero, S Calusi

  • 1Energetics Department and INFN Sezione di Firenze, University of Firenze, Firenze, Italy. lagomarsino@fi.infn.it

Optics Express
|October 6, 2012
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This study details how proton implantation affects the optical properties of single crystal diamond. Researchers quantified changes in the refractive index, crucial for developing advanced photonic devices.

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Area of Science:

  • Materials Science
  • Optics
  • Quantum Engineering

Background:

  • Precise control of optical properties in single crystal diamond is vital for integrated photonic devices.
  • Microfabrication techniques like ion implantation can alter these optical properties.

Purpose of the Study:

  • To systematically investigate the impact of proton implantation on the refractive index of single crystal diamond.
  • To correlate changes in optical properties with varying damage densities.

Main Methods:

  • Single crystal diamond samples were damaged using 2 and 3 MeV protons at fluences from 10(15) to 10(17) cm(-2).
  • Optical pathlength variations were measured using laser interferometric microscopy.
  • Optical transmission was analyzed with a micrometric spatial resolution spectrometric setup.

Main Results:

  • The study quantified variations in both the real and imaginary parts of the refractive index of single crystal diamond post-proton implantation.
  • A model accounting for non-uniform damage profiles was used to evaluate refractive index changes relative to damage density.

Conclusions:

  • Proton implantation significantly alters the complex refractive index of single crystal diamond.
  • Understanding these optical property variations is essential for designing and fabricating diamond-based photonic devices.