Bartholomew, John G.; Sellars, Matthew J.
We propose and demonstrate the principle of a sub-diffraction-limited optical imaging technique for rare-earth ion crystals that preserves the ions’ homogeneous line width. Our method uses a combination of applied electric field gradients and optical pumping to create a resonant nanoscopic volume within an otherwise non-resonant macroscopic crystal. We present the concept of the Stark activation technique and perform a demonstration in Pr³⁺: Y₂SiO₅ in which we create a 10 μm-thick absorption...[Show more]
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