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Articles by Michael Chini
Characterizing few-cycle UV resonant dispersive waves through direct field sampling
We demonstrate compression of few-cycle ultraviolet (UV) resonant dispersive waves (RDWs) generated in a cascaded hollow capillary fiber setup using a Yb laser system. Temporal characterization is performed using both tunneling ionization with a perturbation for the time-domain observation of an electric field (TIPTOE) and self-diffraction frequency-resolved optical gating (SD-FROG), which show good agreement.
Light-field synthesizer based on multidimensional solitary states in hollow-core fibers
Abstract Few-cycle, long-wavelength sources for generating isolated attosecond soft x ray pulses typically rely upon complex laser architectures. Here, we demonstrate a comparatively simple setup for generating sub-two-cycle pulses in the short-wave infrared based on multidimensional solitary states in an N2O-filled hollow-core fiber and a two-channel light-field synthesizer.
Electron-electron interactions and high-order harmonics in solids
Abstract The generation of high-order harmonics in bulk systems is a young and fast-growing area of research.
Single-shot measurement of few-cycle optical waveforms on a chip - Nature Photonics
Abstract The measurement of transient optical fields has proven critical to understanding the dynamical mechanisms underlying ultrafast physical and chemical phenomena, and is key to realizing higher speeds in electronics and telecommunications. However, complete characterization of optical waveforms requires an ‘optical oscilloscope’ capable of resolving the electric-field oscillations with sub-femtosecond resolution and with single-shot operation.
Thermal effects in molecular gas-filled hollow-core fibers
Abstract Few-cycle sources with high average powers are required for applications to attosecond science. Raman-enhanced spectral broadening of Yb-doped laser amplifiers in molecular gases can yield few-cycle pulses, but thermal excitation of vibrational and rotational degrees of freedom may preclude high-power operation. Here we investigate changes in the spectral broadening associated with repetitive laser interactions in an ${{\rm{N}}_2}{\rm{O}}$-filled hollow-core fiber.
Spectral narrowing broadens applications
Four-wave mixing near atomic resonances offers new opportunities for spectral control of extreme ultraviolet pulses. Fig. 1: Schematic of four-wave mixing process. References 1. Leone, S. R. et al. Nat. Photon. 8, 162–166 (2014). ADS Article Google Scholar 2. Drescher, L. et al. Nat. Photon. https://doi.org/10.1038/s41566-020-00758-8 (2021). 3. Chini, M., Zhao, K. & Chang, Z. Nat. Photon. 8, 178–186 (2014). ADS Article Google Scholar 4. Li, J. et al. Nat. Commun. 8, 186 (2017). ADS Article Google Scholar 5. Gaumnitz, T.
Fortune's Favorite Business Books of the Year
We polled Fortune’s readers, surveyed the staff, and—above all—read a lot of new titles to bring you this year’s list of our favorite books of 2017. From Sheryl Sandberg’s tale of grief and resilience to a backgrounder on the wine industry, we found these to be the most enlightening (and enjoyable) reads of the year. The roundup is, of course, subjective, but we hope you’ll like them as much as we did.
The Best Credit Cards of 2017 for Every Financial Use
It’s been eight years since the end of the Great Recession, and credit cards are back. Today, 171 million Americans have at least one card in their wallet, the highest number since 2005. Consumers also owe more than $1 trillion in revolving credit card debt, an all-time record. Even the percentage of consumers with less-than-stellar credit who have access to plastic is nearly back to pre-crisis levels.
Books to Read This Spring That Will Make You More Productive
How to Have a Good Day: Harness the Power of Behavioral Science to Transform Your Working Life, by Caroline Webb The title How to Have a Good Day might suggest a collection of well-meaning but nebulous homilies about life. This work is just the opposite. Economist and former McKinsey partner Caroline Webb has crafted a practical primer.
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