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href="http://news.oecr.com/news/popularscience/">光电科普</a> <em>›</em> 查看内容 </div> </div> <!--[diy=diy1]--><div id="diy1" class="area"></div><!--[/diy]--> </div> <style id="diy_style" type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">如何实现低功耗的全光学晶体管？这种新型光子晶体值得关注！ </h1> <p class="xg1"> 时间：2020-1-10 11:53<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(455)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=8187&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=62" 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>光子晶体是指具有光子带隙（PhotonicBand-Gap，简称为PBG）特性的人造周期性电介质结构，有时也称为PBG光子晶体结构。所谓的光子带隙是指某一频率范围的波不能在此周期性结构中传播，即这种结构本身存在“禁带”。</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"><div> 光子<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>是指具有光子带隙（PhotonicBand-Gap，简称为PBG）特性的人造周期性电介质结构，有时也称为PBG光子晶体结构。所谓的光子带隙是指某一频率范围的波不能在此周期性结构中传播，即这种结构本身存在“禁带”。</div><div><br></div><div> 迄今为止，已有多种基于光子晶体的全新光子学器件被相继提出，包括无阈值的<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器，无损耗的反射镜和弯曲光路，高品质因子的光学微腔，低驱动能量的非线性开关和放大器，波长分辨率极高而体积极小的超棱镜，具有色散补偿作用的光子晶体光纤，以及提高效率的<a href="http://light.oecr.com" target="_blank" class="relatedlink">发光</a>二极管等。光子晶体的出现使信息处理技术的“全光子化”和光子技术的微型化与集成化成为可能，它可能在未来导致信息技术的一次革命，其影响可能与当年<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">半导体</a>技术相提并论。</div><div><br></div><div> 光子晶体的制备有一定的难度，因为光子晶体的晶格尺度和光的波长具有相同的数量级，如：对于光<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>波段（波长1.55μm），要求光子晶体的晶格在0.5μm左右。近些年来，在人们不断探索和试验的过程中，出现了许多可行的人工制备方法，如：介质棒堆积、精密<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机械</a>钻孔、胶体颗粒自组织生长、胶体溶液自组织生长和半导体<a href="http://optics.oecr.com" target="_blank" class="relatedlink">工艺</a>等。用这些方法，通过人工地控制光子晶体中介电<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>之间介电常数的配比和光子晶体的微周期性结构，可以制备出带有各种带隙的光子晶体。</div><div><br></div><div> 在《先进光子学（AdvancedPhotonics）》杂志上发表的一篇新论文中，美国加州大学圣迭戈分校的ShimonRubin和YeshaiahuFainman用液体创造出一款灵活且耐用的光子晶体，证明了这是有可能实现的。</div><div><br></div><div> 他们执行了一系列的运算，基于液体<a href="http://opticalfilm.oecr.com" target="_blank" class="relatedlink">薄膜</a>中非常局部化的加热，来预测光子晶体的组成和性能。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202001/10/115251z146fp2z6np144p6.jpg" target="_blank"><img src="data/attachment/portal/202001/10/115251z146fp2z6np144p6.jpg"></a></p></div><div style="text-align: center;"><br></div><div style="text-align: center;"> （图片来源于研究人员）</div><div><br></div><div> 液体通常不被认为是光子晶体的一个好选择，因为液体没有固定的结构。一个光子晶体的光学特性，取决于光线要能够反映出数百万个精确放置的结构。但是液体起伏涨落，所以结构很快就会被冲掉。</div><div><br></div><div> 然而，Rubin和Fainman表示，在一个超薄液体膜和一个固体或气体的界面处，液体表面张力和局部温度之间的相互作用会创造出一个小型结构（例如，液体堆积成小山丘）。然而，尚不清楚结构是否足够明显，以至于能够像超表面（一种光子晶体）一样工作，并改变光线的传播。</div><div><br></div><div> 研究人员研究了液体薄膜的几种布置，它使得光线在液体内被轻而易举地引导（至少是部分地）。研究人员采用液体的光学与热学特性，结合流体动力学方程和光学传播来计算液体吸收的热量，以及它是如何引起局部形变的。</div><div><br></div><div> 为了证明他们提议的超表面的作用，研究人员计算了一个激光器的阈值。此外，通过改变光波之间的角度，或者用于创造图案的光线波长，图案可被动态改变。甚至连运动的图案也可以通过调节这些光波中的某一个来创造。</div><div><br></div><div><section style="color: rgb(143, 143, 143); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; margin: 0px 0px 15px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important;"><span style="overflow-wrap: break-word !important; margin: 0px; padding: 0px; max-width: 100%; font-size: 15px; box-sizing: border-box !important;"><b style="overflow-wrap: normal;"> 声明：编写或转载此文是为了传递更多的信息，为光电行业尽一些绵薄之力。若文字或图片侵犯了您的合法权益或有不当之处，请速与我们联系，我们将及时更正删除。</b></span></section><p microsoft="" yahei",="" u5faeu8f6fu96c5u9ed1,="" 宋体,="" "helvetica="" neue",="" helvetica,="" stheiti,="" tahoma,="" arial;="" background-color:="" rgb(239,="" 243,="" 245);="" text-indent:="" 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href="http://club.oecr.com/space-uid-81933.html" class="xi2 xw1" c="1">jsdxjxr</a> <span class="xg1 xw0">2020-1-10 13:23</span> </dt> <dd>我是个凑数的。。。</dd> </dl><a name="comment_anchor_25235"></a> <dl id="comment_25235_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(25235, '8187');">引用</a> </span> <a href="http://club.oecr.com/space-uid-52148.html" class="xi2 xw1" c="1">jessie2008</a> <span class="xg1 xw0">2020-1-10 12:53</span> </dt> <dd>大家喜欢在手机看oecr吗？</dd> </dl><a name="comment_anchor_25234"></a> <dl id="comment_25234_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(25234, '8187');">引用</a> </span> <a href="http://club.oecr.com/space-uid-87337.html" class="xi2 xw1" c="1">Shanazhao</a> <span class="xg1 xw0">2020-1-10 12:23</span> </dt> <dd>围观 围观 沙发在哪里！！！</dd> </dl><a name="comment_anchor_25233"></a> <dl id="comment_25233_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(25233, '8187');">引用</a> </span> <a href="http://club.oecr.com/space-uid-43463.html" class="xi2 xw1" c="1">shengancai</a> <span class="xg1 xw0">2020-1-10 11:53</span> </dt> <dd>来这里好多年了。</dd> </dl></div> </div> <!--[diy=diycontentcomment]--><div id="diycontentcomment" class="area"></div><!--[/diy]--> </div> <div class="sd pph"> <div class="drag"> <!--[diy=diyrighttop]--><div id="diyrighttop" class="area"><div id="frameorJGGx" class="sy_ltdr frame move-span cl frame-1"><div class="frame-title title"><span class="titletext">社区成员推荐</span></div><div id="frameorJGGx_left" class="column frame-1-c"><div id="frameorJGGx_left_temp" class="move-span temp"></div><div id="portal_block_930" class="cl_block_bm block move-span"><div id="portal_block_930_content" class="dxb_bc"><div class="module cl ml mls"> <ul><li> <a href="http://club.oecr.com/space-uid-126440.html" c="1" 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