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href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(45)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=10275&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>短波长涡旋光因其独特的螺旋相位分布和轨道角动量特性，在非线性光学、超分辨显微成像、凝聚态物理、细胞生物学等前沿科学领域具有应用前景。但受限于现有技术瓶颈，如何产生高亮度、短脉冲以及相干性好的高品质X射 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-indent: 2em; text-align: justify; margin-bottom: 26px !important; line-height: 32px !important;">短波长涡旋光因其独特的螺旋相位分布和轨道角动量特性，在非线性光学、超分辨显微成像、凝聚态<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>、细胞生物学等前沿科学领域具有应用前景。但受限于现有技术瓶颈，如何产生高亮度、短脉冲以及相干性好的高品质X射线涡旋光尚不明晰。</p><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-indent: 2em; text-align: justify; margin-bottom: 26px !important; line-height: 32px !important;">近期，中国科学院上海高等研究院研究员冯超团队在高品质X射线涡旋光产生方法上取得突破，并提出基于波前整形的新方案。该方案通过在自由<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a><a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>增益过程中微调辐射波前，实现了X射线光束从高斯模式向涡旋模式的高效转换。与传统依赖螺旋波荡器或<a href="http://holographic.oecr.com" target="_blank" class="relatedlink">全息</a>元件<span style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; margin-bottom: 26px !important; line-height: 32px !important;">方法</span>不同，该方案无需额外对电子束进行操控或采用复杂光学器件，即通过引入一对可调倾角的平面反射镜，使高增益自由电子激光装置中产生高亮度涡旋光束，且该光束具备更好的波长可调性与更高的工程可行性。模拟结果表明，该方案可在数十吉瓦功率水平下输出占比超97%的高纯度涡旋X射线。</p><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-indent: 2em; text-align: justify; margin-bottom: 26px !important; line-height: 32px !important;">该研究提供了波前整形新思路，解决了当前大多光学元件难以满足X射线自由电子激光高功率和波长范围局限的问题，有望应用于现有X射线自由电子激光装置和多种自由电子激光运行模式。同时，该研究为X射线自由电子激光装置产生涡旋光提供了简单有效的新途径，为学界进一步探讨复杂电子结构、<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>微观构型以及生物分子动力学等研究方面提供了新的观测手段。</p><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-indent: 2em; text-align: justify; margin-bottom: 26px !important; line-height: 32px !important;">相关研究成果以<em style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; margin-bottom: 26px !important; line-height: 32px !important;">Intense X-Ray Vortices Generation via Wavefront Shaping in High-Gain Free-Electron Lasers</em>为题，发表在《物理评论快报》（<em style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; margin-bottom: 26px !important; line-height: 32px !important;">Physical Review Letters</em>）上。研究工作得到国家自然科学基金委员会、中国科学院的支持。</p><p style="text-align: center;"><a href="data/attachment/portal/202506/10/073039o3ixu2ig3yex3s6i.png" target="_blank"><img src="data/attachment/portal/202506/10/073039o3ixu2ig3yex3s6i.png"></a></p><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-align: center; margin-bottom: 26px !important; line-height: 32px !important;"><span style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; text-indent: 2em; margin-bottom: 26px !important; line-height: 32px !important;">基于波前整形产生X射线涡旋自由电子激光的方案示意图</span></p><p style="text-align: center;"><a href="data/attachment/portal/202506/10/072716bijpy6a5yjjarary.jpg" target="_blank"><img src="data/attachment/portal/202506/10/072716bijpy6a5yjjarary.jpg"></a></p><p style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 0px; border: 0px; list-style: none; font-size: 16px; line-height: 1.5em; font-family: 微软雅黑; color: rgb(68, 68, 68); background-color: rgb(255, 255, 255); text-indent: 2em; text-align: center; margin-bottom: 26px !important;"><span style="margin-top: 0px; margin-right: 0px; margin-left: 0px; padding: 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onclick="portal_comment_requote(35873, '10275');">引用</a> </span> <a href="http://club.oecr.com/space-uid-74036.html" class="xi2 xw1" c="1">zengbin1</a> <span class="xg1 xw0">2025-6-10 08:31</span> </dt> <dd>我喜欢摄影</dd> </dl><a name="comment_anchor_35872"></a> <dl id="comment_35872_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(35872, '10275');">引用</a> </span> <a href="http://club.oecr.com/space-uid-74581.html" class="xi2 xw1" c="1">无辐射跃迁</a> <span class="xg1 xw0">2025-6-10 08:01</span> </dt> <dd>边撸边过</dd> </dl><a name="comment_anchor_35871"></a> <dl id="comment_35871_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(35871, '10275');">引用</a> </span> <a href="http://club.oecr.com/space-uid-63435.html" class="xi2 xw1" c="1">lkhua</a> <span class="xg1 xw0">2025-6-10 07:31</span> </dt> <dd>我是学光学的啦。</dd> </dl></div> </div> 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