Element-specific electronic and structural dynamics using transient X-ray spectroscopy

Kavli Affiliate: Scott K. Cushing | First 5 Authors: Hanzhe Liu, Isabel M. Klein, Jonathan M. Michelsen, Scott K. Cushing, | Summary: Transient X-ray absorption techniques can measure ultrafast dynamics of the elemental edges in a material or multiple layer junction, giving them immense potential for deconvoluting concurrent processes. However, the interpretation of the photoexcited […]


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Attend and select: A segment selective transformer for microblog hashtag generation

Kavli Affiliate: Lihong Wang | First 5 Authors: Qianren Mao, Xi Li, Bang Liu, Shu Guo, Peng Hao | Summary: Hashtag generation aims to generate short and informal topical tags from a microblog post, in which tokens or phrases form the hashtags. These tokens or phrases may originate from primary fragmental textual pieces (e.g., segments) […]


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All-optical Quantum State Engineering for Rotation-symmetric Bosonic States

Kavli Affiliate: Alireza Marandi | First 5 Authors: Rajveer Nehra, Miller Eaton, Olivier Pfister, Alireza Marandi, | Summary: Continuous-variable quantum information processing through quantum optics offers a promising platform for building the next generation of scalable fault-tolerant information processors. To achieve quantum computational advantages and fault tolerance, non-Gaussian resources are essential. In this work, we […]


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Probing Strong Coupling between a Microwave Cavity and a Spin Ensemble with Raman Heterodyne Spectroscopy

Kavli Affiliate: Andrei Faraon | First 5 Authors: Gavin G. G. King, Peter S. Barnett, John G. Bartholomew, Andrei Faraon, Jevon J. Longdell | Summary: Raman heterodyne spectroscopy is a powerful tool for characterizing the energy and dynamics of spins. The technique uses an optical pump to transfer coherence from a spin transition to an […]


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NTIRE 2021 Challenge on Quality Enhancement of Compressed Video: Methods and Results

Kavli Affiliate: Wei Gao | First 5 Authors: Ren Yang, Radu Timofte, Jing Liu, Yi Xu, Xinjian Zhang | Summary: This paper reviews the first NTIRE challenge on quality enhancement of compressed video, with a focus on the proposed methods and results. In this challenge, the new Large-scale Diverse Video (LDV) dataset is employed. The […]


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High-performance lasers for fully integrated silicon nitride photonics

Kavli Affiliate: Kerry J. Vahala | First 5 Authors: Chao Xiang, Joel Guo, Warren Jin, Jonathan Peters, Weiqiang Xie | Summary: Silicon nitride (SiN) waveguides with ultra-low optical loss enable integrated photonic applications including low noise, narrow linewidth lasers, chip-scale nonlinear photonics, and microwave photonics. Lasers are key components to SiN photonic integrated circuits (PICs), […]


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Intense optical parametric amplification in dispersion engineered nanophotonic lithium niobate waveguides

Kavli Affiliate: Alireza Marandi | First 5 Authors: Luis Ledezma, Ryoto Sekine, Qiushi Guo, Rajveer Nehra, Saman Jahani | Summary: Strong amplification in integrated photonics is one of the most desired optical functionalities for computing, communications, sensing, and quantum information processing. Semiconductor gain and cubic nonlinearities, such as four-wave mixing and stimulated Raman and Brillouin […]


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Efficient Octave-Spanning Parametric Down-Conversion at the Picojoule Level

Kavli Affiliate: Alireza Marandi | First 5 Authors: Marc Jankowski, Nayara Jornod, Carsten Langrock, Boris Desiatov, Alireza Marandi | Summary: The generation and amplification of photons by parametric down-conversion in quadratic nonlinear media is used as a source of entangled photons, squeezed light, and short optical pulses at difficult to access wavelengths. Optical nonlinearities are […]


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Quasi-static Optical Parametric Amplification

Kavli Affiliate: Alireza Marandi | First 5 Authors: Marc Jankowski, Nayara Jornod, Carsten Langrock, Boris Desiatov, Alireza Marandi | Summary: High-gain optical parametric amplification is an important nonlinear process used both as a source of coherent infrared light and as a source of nonclassical light. In this work, we experimentally demonstrate an approach to optical […]


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