Catálogo de publicaciones - revistas

<jats:title>Microlasers with a twist</jats:title> <jats:p> Structured light, in the form of helical wavefronts, provides an additional degree of freedom to encode information for optical communications. Creating light beams with the desired amount of optical angular momentum, or twist, has usually been achieved with bulk optic devices. Miao <jats:italic>et al.</jats:italic> demonstrate a possible route for an integrated optics approach in which a twisted-light source with a controlled amount of optical angular momentum is generated internally to the designed device structure. These microlasers could find application in telecommunication and information technologies to increase the rate of information transmission. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6298" page="464" related-article-type="in-this-issue" vol="353" xlink:href="10.1126/science.aaf8533">464</jats:related-article> </jats:p>

<jats:title> Small and salty CO <jats:sub>2</jats:sub> reduction scheme </jats:title> <jats:p> Most artificial photosynthesis approaches focus on making hydrogen. Modifying CO <jats:sub>2</jats:sub> , as plants and microbes do, is more chemically complex. Asadi <jats:italic>et al.</jats:italic> report that fashioning WSe <jats:sub>2</jats:sub> and related electrochemical catalysts into nanometer-scale flakes greatly improves their activity for the reduction of CO <jats:sub>2</jats:sub> to CO. An ionic liquid reaction medium further enhances efficiency. An artificial leaf with WSe <jats:sub>2</jats:sub> reduced CO <jats:sub>2</jats:sub> on one side while a cobalt catalyst oxidized water on the other side. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6298" page="467" related-article-type="in-this-issue" vol="353" xlink:href="10.1126/science.aaf4767">467</jats:related-article> </jats:p>

<jats:title>An ocean of climate impacts</jats:title> <jats:p> Large decreases in Atlantic meridional overturning circulation accompanied every one of the cold Northern Hemispheric stadial events that occurred during the heart of the last glacial period. These events, lasting on average around 1000 years each, have long been thought to result from changes in deep ocean circulation. Henry <jats:italic>et al.</jats:italic> used a suite of geochemical proxies from marine sediments to show that reductions in the export of northern deep waters occurred before and during stadial periods (see the Perspective by Schmittner). This observation firmly establishes the role of ocean circulation as a cause of abrupt glacial climate change during that interval. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6298" page="470" related-article-type="in-this-issue" vol="353" xlink:href="10.1126/science.aaf5529">470</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6298" page="445" related-article-type="in-this-issue" vol="353" xlink:href="10.1126/science.aag3156">445</jats:related-article> </jats:p>