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Large Scale Production of Photonic Crystals on Scintillators

Knapitsch, A; Auffray, E; Barbastathis, G; Chevalier, C; Hsieh, C-H; Kim, J-G; Li, S; ... Lecoq, P; + view all (2016) Large Scale Production of Photonic Crystals on Scintillators. IEEE Transactions on Nuclear Science , 63 (2) pp. 639-643. 10.1109/TNS.2016.2535328. Green open access

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Heavy inorganic scintillator based detectors are used in various applications. You can find them in high energy physics as well as in nuclear medical imaging systems but also in homeland security radiation monitoring devices. In all these different detectors, light is produced in the scintillator and has to be transported towards a photodetector. The standard optical coupling of such a detector suffers from an inefficient light extraction towards the photodetector due to the high index of refraction of the scintillator and the accompanying total internal reflections. With the means of photonic nanostructuring of the different surfaces of the scintillator, the light transport can be optimized, which has a direct impact on the timing and light yield performance of the detector. Previous work from our group has already shown that photonic crystals (PhCs) can be used as diffraction gratings to improve the light coupling between a photodetector and a scintillator. Moreover, nanoscale surface structuring techniques could also be extended to the sidewalls, the wrapping, or the detector itself, which would open up a number of new possibilities for optimization of the light transport of scintillation based detectors. To show that PhCs can also be produced on a large industrial scale, we started to investigate different methods for cheap and large area PhC structuring. In this work, the current results on our efforts on PhC scintillator production will be described. The different projects include nanoimprint technologies, interference lithography and colloidal lithography. To conclude, we will summarize the different efforts of our group and collaborators and show up-to-date results of PhC improved scintillators.

Type: Article
Title: Large Scale Production of Photonic Crystals on Scintillators
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TNS.2016.2535328
Publisher version: http://dx.doi.org/10.1109/TNS.2016.2535328
Language: English
Additional information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Science & Technology, Technology, Engineering, Electrical & Electronic, Nuclear Science & Technology, Engineering, Colloidal lithography, light diffraction, light extraction, Monte Carlo, nanoimprint, nanolithography, photonic crystals (PhCs), scintillators, Diffraction Regimes, Light Output, Gratings
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1494572
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