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We establish that a complete, natural hormonal environment (hemolymph) increases the likelihood of a neuropeptide activating the gastric mill (chewing) rhythm in the crab stomatogastric ganglion (STG). The similar action of a higher neuropeptide concentration in saline, its comparable desensitizing effect to that of neuropeptide plus hemolymph on subsequent neuropeptide applications, and the absence of that neuropeptide in hemolymph suggest one or more distinct hormones act to enhance the effectiveness of the applied peptide.more » « lessFree, publicly-accessible full text available August 1, 2026
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We use crystalline silicon (Si) antennas to efficiently extract broadband single-photon fluorescence from shallow nitrogen-vacancy (NV) centers in diamond into free space. Our design features relatively easy-to-pattern high-index Si resonators on the diamond surface to boost photon extraction by overcoming total internal reflection and Fresnel reflection at the diamond-air interface, and providing modest Purcell enhancement, without etching or otherwise damaging the diamond surface. In simulations, ~20 times more single photons are collected from a single NV center compared to the case without the antenna; in experiments, we observe an enhancement of ~4 times, limited by spatial alignment between the NV and the antenna. Our approach can be readily applied to other color centers in diamond, and more generally to the extraction of light from quantum emitters in wide-bandgap materials.more » « less
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We propose a platform for the study of collective emission in a solid-state system, consisting of silicon-vacancy (SiV) centers implanted in subwavelength ordered arrays. Numerical simulations of emitter-emitter interactions, fabrication, and preliminary characterization are presented.more » « less
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