Purcell Effect of Plasmonic Perovskite Scintillators

Scintillating materials, which convert high-energy radiation into visible light, are vital for applications such as medical imaging (e.g., positron emission tomography and photon counting computed tomography), industrial technologies like security scanning and oil exploration, and scientific research in high-energy physics and neutrino detection [1]. These materials function by exciting electrons through interactions like photoelectric effect and Compton scattering while their performance metrics include scintillation light yield and decay time, traditionally enhanced via material engineering, dopant optimization, and advanced electronics [2]. Recent proposal has introduced the Purcell effect, which modifies the local density of optical states to amplify radiative decay rates and improve emission efficiency [3]. Perovskite-based scintillators, with their fast decay times, high light yields, and tunable properties, are perfect platforms for demonstration of the Purcell effect [4], [5]. Here we demonstrate substantial Purcell enhancements in scintillation efficiency, decay dynamics, and scalability using thin film [4] and nanocrystal (NC) perovskite scintillators [5]. Both works indeed explore the integration of nanoplasmonic techniques to develop scintillators optimized for ultrafast imaging applications, bridging the gap between nanoscale enhancements and practical large-scale implementations.