Photonic crystal based radiochromic dosimeter for electron-beam irradiation with superior spatial and dose resolution

Electron-beam (e-beam) technology display widespread applications that heavily relies on the delivered dose and irradiated geometrical area. However, the immediate visualization of precise e-beam dose and spatial dose distribution is challenging due to high throughput flux and strong electron scattering. Herein, we developed wide dose-response range (0–3750 kGy) and high spatial resolution (<100 μm) e-beam dosimetry based on photonic crystal polymer films. Notably, the diffraction peak of the inverse opal film exhibits a continuous blue shift with increased dose within the visible light wavelength range. The naked-eye readable dosimeter showed excellent pre- and post-irradiation stability, which means it is resistance to environmental factors such as temperature and ultraviolet exposure. We suggested that these advantages make photonic crystal films promising candidates for high-dose e-beam dosimetry and beam uniformity evaluation.