Sloyan, Katherine A., May-Smith, Timothy C., Zervas, Michalis N. and Eason, Robert W.
Crystalline garnet Bragg reflectors for high power, high temperature, and integrated applications fabricated by multi-beam pulsed laser deposition
Applied Physics Letters, 101, (8), . (doi:10.1063/1.4748107).
Crystalline Bragg reflectors are of interest for high power, high temperature and integrated applications. We demonstrate the automated growth of such structures by shuttered multi-beam Pulsed Laser Deposition (PLD). Geometries include 145 layer stacks exhibiting >99.5% reflection and pi phase-shifted designs. A crystalline grating strength-apodized sample was grown by mixing plumes to obtain layers with custom refractive indices. Peak reflection wavelength was tuneable with incident position, samples withstood temperatures of ~750 °C and film and substrate have been shown to withstand incident pulsed laser fluences of up to ~33 Jcm-2.
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