The Influence of Sub-Wavelength Effective Refractive Index Layer on the Transmittance of LYSO Scintillator
P. Modrzyńskia, A. Olejniczak a, A. Zięba a, P. Kunicki a, M. Tomanik b and M. Wielebski a
aNanores Sp. z o.o. Sp. k., Bierutowska 57-59, 53-317 Wrocław, Poland
bDepartment of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Łukasiewicza 7/9, 50-371 Wrocław, Poland
Received: September 11, 2016
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From various types of scintillating materials lutetium-yttrium oxyorthosilicate (LYSO) has the highest luminosity and the greatest potential of application in high-energy radiation detectors. Due to the small critical angle of total internal reflection the enhancement of the extraction of light outside a scintillator is a challenge. We study numerically the influence of the effective refractive index layer on the transmittance of LYSO crystal. It is possible to realize such layer by sub-wavelength patterning of crystal surface using for example focused ion beam. The enhancement of transmittance of LYSO crystal up to 100% as well as the possibility to tune the positions of transmittance maxima have been shown.

DOI: 10.12693/APhysPolA.131.1565
PACS numbers: 42.25.Bs, 42.25.Gy, 42.79.Dj, 02.70.Bf, 78.70.Ps, 29.40.Mc