53 research outputs found
Generative artificial intelligence-enabled dynamic detection of nicotine-related circuits
The identification of addiction-related circuits is critical for explaining
addiction processes and developing addiction treatments. And models of
functional addiction circuits developed from functional imaging are an
effective tool for discovering and verifying addiction circuits. However,
analyzing functional imaging data of addiction and detecting functional
addiction circuits still have challenges. We have developed a data-driven and
end-to-end generative artificial intelligence(AI) framework to address these
difficulties. The framework integrates dynamic brain network modeling and novel
network architecture networks architecture, including temporal graph
Transformer and contrastive learning modules. A complete workflow is formed by
our generative AI framework: the functional imaging data, from neurobiological
experiments, and computational modeling, to end-to-end neural networks, is
transformed into dynamic nicotine addiction-related circuits. It enables the
detection of addiction-related brain circuits with dynamic properties and
reveals the underlying mechanisms of addiction
Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
The strong coupling between photons and matter excitations such as excitons,
phonons, and magnons is of central importance in the study of light-matter
interactions. Bridging the flying and stationary quantum states, the strong
light-matter coupling enables the coherent transmission, storage, and
processing of quantum information, which is essential for building photonic
quantum networks. Over the past few decades, exciton-polaritons have attracted
substantial research interest due to their half-light-half-matter bosonic
nature. Coupling exciton-polaritons with magnetic orders grants access to rich
many-body phenomena, but has been limited by the availability of material
systems that exhibit simultaneous exciton resonances and magnetic ordering.
Here we report magnetically-dressed microcavity exciton-polaritons in the van
der Waals antiferromagnetic (AFM) semiconductor CrSBr coupled to a Tamm plasmon
microcavity. Angle-resolved spectroscopy reveals an exceptionally high
exciton-polariton coupling strength attaining 169 meV, demonstrating
ultrastrong coupling that persists up to room temperature.
Temperature-dependent exciton-polariton spectroscopy senses the magnetic order
change from AFM to paramagnetism in CrSBr, confirming its magnetic nature. By
applying an out-of-plane magnetic field, an effective tuning of the polariton
energy is further achieved while maintaining the ultrastrong exciton-photon
coupling strength, which is attributed to the spin canting process that
modulates the interlayer exciton interaction. Our work proposes a hybrid
quantum platform enabled by robust opto-electronic-magnetic coupling, promising
for quantum interconnects and transducers.Comment: 8 pages, 4 figure
Wafer-Size and Single-Crystal MoSe_2 Atomically Thin Films Grown on GaN Substrate for Light Emission and Harvesting
Two-dimensional (2D) atomic-layered semiconductors are important for next-generation electronics and optoelectronics. Here, we designed the growth of an MoSe_2 atomic layer on a lattice-matched GaN semiconductor substrate. The results demonstrated that the MoSe_2 films were less than three atomic layers thick and were single crystalline of MoSe_2 over the entire GaN substrate. The ultrathin MoSe_2/GaN heterojunction diode demonstrated ∼850 nm light emission and could also be used in photovoltaic applications
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