Improving light collection efficiency using partitioned light guide on pixelated scintillator-based γ-ray imager

Hyeon, Suyeon; Hammig, Mark D.; Jeong, Manhee

doi:10.1016/j.net.2021.12.002

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Further on, many scintillator based high energy detectors use optical coupling for direct contact of scintillator pixel with the CMOS camera or even special design of the pixel which promotes wave-guiding of the scintillated light. In such cases the scintillated light does not need to couple to free space radiation [42], [43]. Finally, in broader picture, the high-Q approach opens new possibilities, otherwise not accessible.…”

Section: Discussionmentioning

confidence: 99%

Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic, and Perovskite Scintillators

Kowal

Wong

Birowosuto

2023

IEEE Trans. Nucl. Sci.

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Optimizing the emission properties of materials in ultraviolet and deep blue (UV-DB) is interesting in development of new scintillator devices for the detection of X-ray, γ-ray and radiation particles as those materials can be strong candidates for high light yield and fast scintillators. While their intrinsic material properties are already well studied, photonic enhancement generated through optical confinement could significantly improve their emission characteristics, however one needs to overcome the problem of relatively low refractive indices contrast resulting in poor confinement of UV-DB light. This motivates the search for resonator structures built from readily accessible materials that can boast strong confinement in this spectral regime. Here, we present such a structure, leveraging bound states in the continuum (BICs) to realize large-area confinement of UV-DB light with ultra-high quality factors up to Q ∼10 7 . These ultra-high Q-factors in turn result in strong enhancements in light emission via the Purcell effect. We demonstrate the operation of such a design by simulating the mode shape, Qfactor and emission behaviour in organic, hybrid perovskite and III-V scintillating materials. By tailoring the structure geometry, it can be robustly tuned to match the emission characteristics of chosen materials. We start with considering ideal infinite structure supporting perfect BIC and we extend our model on finite sized structures and we discuss the limitations associated with the self-absorption and thickness of the structure. Our findings pave the way to cost-effective and efficient designs for scintillators in the UV-DB regime.

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Section: Discussionmentioning

confidence: 99%

Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic, and Perovskite Scintillators

Kowal

Wong

Birowosuto

2023

IEEE Trans. Nucl. Sci.

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Passive Gamma-Ray Detection With Compact Lightweight Imager for Nuclear Safeguards

Boo

Hammig

Jeong

2022

IEEE Trans. Nucl. Sci.

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Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic and Perovskite Scintillators

Kowal¹,

Wong²,

Birowosuto³

2023

Preprint

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<p>Optimizing the emission properties of materials in ultraviolet and deep blue (UV-DB) is interesting in development of new scintillator devices for the detection of X-ray, γ-ray and radiation particles as those materials can be strong candidates for high light yield and fast scintillators. While their intrinsic material properties are already well studied, photonic enhancement generated through optical confinement could significantly improve their emission characteristics, however one needs to overcome the problem of relatively low refractive indices contrast resulting in poor confinement of UV-DB light. This motivates the search for resonator structures built from readily accessible materials that can boast strong confinement in this spectral regime. Here, we present such a structure, leveraging bound states in the continuum (BICs) to realize large-area confinement of UV-DB light with ultra-high quality factors up to Q ∼10<sup>7</sup>. These ultra-high Q-factors in turn result in strong enhancements in light emission via the Purcell effect. We demonstrate the operation of such a design by simulating the mode shape, Q factor and emission behaviour in organic, hybrid perovskite and III-V scintillating materials. By tailoring the structure geometry, it can be robustly tuned to match the emission characteristics of chosen materials. We start with considering ideal infinite structure supporting perfect BIC and we extend our model on finite sized structures and we discuss the limitations associated with the self-absorption and thickness of the structure. Our findings pave the way to cost-effective and efficient designs for scintillators in the UV-DB regime (submitted to IEEE Transactions on Nuclear Sciences).</p>

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Improving light collection efficiency using partitioned light guide on pixelated scintillator-based γ-ray imager

Cited by 3 publications

References 18 publications

Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic, and Perovskite Scintillators

Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic, and Perovskite Scintillators

Passive Gamma-Ray Detection With Compact Lightweight Imager for Nuclear Safeguards

Large-Area Photonic Bound State in the Continuum for Ultraviolet and Deep-Blue Emission for Organic, Inorganic and Perovskite Scintillators

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