Anyone knows the slow light in EIT？

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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-main p-body-main--withSidebar "> <div class="p-body-contentCol"></div> <div class="p-body-sidebarCol"></div> <div class="p-body-content"> <div class="p-body-pageContent"> <div class="p-breadcrumbs--parent "> <ul class="p-breadcrumbs " itemscope itemtype="https://schema.org/BreadcrumbList"> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="https://www.physicsforums.com/" itemprop="item"> <span itemprop="name">Forums</span> </a> <meta itemprop="position" content="1" /> </li> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="/#physics.9" itemprop="item"> <span itemprop="name">Physics</span> </a> <meta itemprop="position" content="2" /> </li> <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"> <a href="/forums/atomic-and-condensed-matter.64/" itemprop="item"> <span itemprop="name">Atomic and Condensed Matter</span> </a> <meta itemprop="position" content="3" /> </li> </ul> </div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value"> Anyone knows the slow light in EIT？ </h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <span data-xf-init="tooltip" title="Level: Advanced (Grad)" ><span class="prefix advanced" dir="auto">A</span></span> </li> <li> <i class="fa--xf fal fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <span>hongqiaozhang</span> </li> <li> <i class="fa--xf fal fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <time class="u-dt" dir="auto" datetime="2024-05-22T01:31:57-0500" data-time="1716359517" data-date-string="May 22, 2024" data-time-string="1:31 AM" title="May 22, 2024 at 1:31 AM">May 22, 2024</time> </li> <li> <dl class="tagList tagList--thread-1062922 "> <dt> <i class="fa--xf fal fa-tags" aria-hidden="true" title="Tags"></i> <span class="u-srOnly">Tags</span> </dt> <dd> <span class="js-tagList"> <a href="/tags/eit/" data-xf-init="preview-tooltip" data-preview-url="/tags/eit/preview" class="tagItem tagItem--tag_eit" dir="auto"> eit </a> <a href="/tags/nonlinear-optics/" data-xf-init="preview-tooltip" data-preview-url="/tags/nonlinear-optics/preview" class="tagItem tagItem--tag_nonlinear-optics" dir="auto"> Nonlinear optics </a> <a href="/tags/quantum-optics/" data-xf-init="preview-tooltip" data-preview-url="/tags/quantum-optics/preview" class="tagItem tagItem--tag_quantum-optics" dir="auto"> Quantum optics </a> </span> </dd> </dl> </li> </ul> </div> </div> <div class="block-container lbContainer" style="padding:5px;"> In summary, the question pertains to the phenomenon of slow light in Electromagnetically Induced Transparency (EIT), which allows light to be slowed down significantly in certain media through the manipulation of quantum interference effects. This has implications for quantum optics and potential applications in information processing and communication technologies. </div> <script src="https://www.physicsforums.com/check-for-tex.js" defer></script> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote old-new-message-indicator" data-sv-live-content-time-element-selector=".message-attribution-main time.u-dt" data-message-selector=".js-post" data-lb-id="thread-1062922" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer">  <article class="message message--post js-post js-inlineModContainer " data-author="hongqiaozhang" data-content="post-7089637" id="js-post-7089637" > <span class="u-anchorTarget" id="post-7089637"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <time class="u-dt" dir="auto" datetime="2024-05-22T01:31:57-0500" data-time="1716359517" data-date-string="May 22, 2024" data-time-string="1:31 AM" title="May 22, 2024 at 1:31 AM">May 22, 2024</time> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <span style="cursor:pointer;" data-xf-init="share-tooltip" data-href="/posts/7089637/share" aria-label="Share" role="button" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </span> </li> <li> #1 </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-userDetails"> <span class="message-name"><span class="username " dir="auto" data-user-id="702641">hongqiaozhang</span></span>   <span class="threadstarter" data-xf-init="tooltip" title="Thread Starter"><i class="fal fa-user-edit"></i></span>   </div> <div class="message-userExtras"> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-comments fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Messages"></i></dt> <dd>10</dd> </dl> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-thumbs-up fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Reaction score"></i></dt> <dd>0</dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7089637" data-lb-caption-desc="hongqiaozhang · May 22, 2024 at 1:31 AM"> <div class="message-fields message-fields--before"> <dl class="pairs pairs--columns pairs--fixedSmall pairs--customField" data-field="summary"> <dt>TL;DR Summary</dt> <dd>I build a EIT system, but the pulse delay between the reference and probe is only several nanoseconds, I read many papers and in their system, the delay can up to several microseconds, I have tried many ways to improve it, but it doesn't work</dd> </dl> </div> <article class="message-body js-selectToQuote"> <div class="googleads_fixed"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6580726045122001" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6580726045122001" data-ad-slot="3049969336" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div > <div class="bbWrapper">I built a EIT system in rubidium gas cell and measured the pulse delay between the reference and probe light. Here, I used a zero-order diffracted light of an AOM as my probe light, but there is just several nanoseconds between these two pulse. I read some papers, like adjusting the Rabi frequency of control light or the temperature of my gas cell to improve the pulse delay, but it doesn't work. <br /> Can anyone who is familiar with electromagnetic induced transparency help me or give me some advice? Thank you so much for your reply.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":smile:" title="Smile :smile:" loading="lazy" data-shortname=":smile:" /></div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> <script> if (typeof parseNewPost == 'function') { $(document).ajaxStop(parseNewPost(7089637)); } </script> </div> </div> </div> </article> </div> </div> </div> <form action="/threads/anyone-knows-the-slow-light-in-eit.1062922/add-reply" method="post" class="block js-quickReply" data-xf-init="attachment-manager quick-reply ajax-submit draft" data-draft-url="/threads/anyone-knows-the-slow-light-in-eit.1062922/draft" data-draft-autosave="60" 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Here, I used a zero-order diffracted light of an AOM as my probe light, but there is just several nanoseconds between these two pulse. I read some papers, like adjusting the Rabi frequency of control light or the temperature of my gas cell to improve the pulse delay, but it doesn't work. \nCan anyone who is familiar with electromagnetic induced transparency help me or give me some advice? Thank you so much for your reply.:smile:" }, "publisher": { "@type": "Organization", "name": "Physics Forums: Science Discussion, Homework Help, Articles", "alternateName": "Physics Forums", "description": "Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various scientific fields.", "url": "https://www.physicsforums.com", "logo": "https://www.physicsforums.com/styles/physicsforums/images/physics-forums-logo-og.png" } } </script> <script type="text/javascript" src="https://www.physicsforums.com/copyright.js" defer></script> <script> function parseNewPost(postid) { var newpost = document.getElementById("js-post-" + postid), npa = [newpost]; MathJax.typeset(npa); } function parsePreview() { var preview = document.getElementsByClassName("xfPreview"); MathJax.typeset(preview); } function parseNewConversationPost(postid) { var newpost = document.getElementsByClassName("convMessage-" + postid); MathJax.typeset(newpost); } function parseNewProfilePost(postid) { var newpost = document.getElementById("js-profilePost-" + postid), npa = [newpost]; MathJax.typeset(npa); } function parseTooltip() { MathJax.typeset(); } </script> </body> </html>

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Anyone knows the slow light in EIT？