Abstract
We demonstrate a new optical source in the form of a thin scintillating film with subdiffraction resolution for bioimaging. Atomically smooth, uniform and highly luminescent scintillating membranes have been successfully fabricated by radio frequency magnetron sputtering for application as a nanoscale imaging probe. This cathodoluminescence-activated optical transducer converts electron beam energy to near-field, visible radiation simultaneously satisfying the requirements for high-resolution, dye-free imaging. We discovered high-yield emission for YAlO3:Gd3+ perovskite thin films with enhanced scintillating properties by providing experimental evidence for quantum cutting in the ultraviolet-visible region. A subwavelength spatial resolution of ∼100 nm with a high signal-to-noise ratio (SNR = 20) under the atmospheric condition is confirmed by using a luminescent optical probe. The simple manufacturing process of such scintillating membranes broadens their application toward super-resolution microscopy, fulfilling prerequisites for biomedical imaging where noninvasive nanoprobe is required.
Published Version
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