Cavity-enhanced room-temperature high sensitivity optical Faraday magnetometry

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• 作者：Hui Sun^a ; ^{hsun@siom.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Yaohua Lei^a ; Shuangli Fan^a ; Qiaolin Zhang^a ; Hong Guo^b ; ^{hongguo@pku.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Optical magnetometry ; Faraday effect ; Cavity QED ; Cavity electromagnetically induced transparency
• 刊名：Physics Letters A
• 出版年：2017
• 出版时间：23 January 2017
• 年：2017
• 卷：381
• 期：3
• 页码：129-135
• 全文大小：608 K

文摘

We propose a cavity QED system with two-photon Doppler-free configuration for weak magnetic field detection with high sensitivity at room temperature based on cavity electromagnetically induced transparency. Owing to the destructive interference induced by the control and driving fields, two transparency channels are opened. The Faraday rotation within two transparency channels can be used to detect weak magnetic field with high sensitivity at room temperature. The sensitivity with single photon and multiphoton probe inputs is analyzed. With single photon measurement, our numerical calculations demonstrate that the sensitivity with class="mathmlsrc">class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0375960116309641&_mathId=si1.gif&_user=111111111&_pii=S0375960116309641&_rdoc=1&_issn=03759601&md5=933d129665371f10926050353e2465eb">class="imgLazyJSB inlineImage" height="16" width="73" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0375960116309641-si1.gif">class="mathContainer hidden">class="mathCode"> and class="mathmlsrc">class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0375960116309641&_mathId=si2.gif&_user=111111111&_pii=S0375960116309641&_rdoc=1&_issn=03759601&md5=7f749c55d73c7cbfc6464d25fbd8ffe9">class="imgLazyJSB inlineImage" height="16" width="72" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0375960116309641-si2.gif">class="mathContainer hidden">class="mathCode"> could be achieved. When we measure the magnetic field with multiphoton input, the sensitivity can be improved to class="mathmlsrc">class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0375960116309641&_mathId=si3.gif&_user=111111111&_pii=S0375960116309641&_rdoc=1&_issn=03759601&md5=ba52dceb67af22ddf1d090a4270e3fc5">class="imgLazyJSB inlineImage" height="16" width="70" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0375960116309641-si3.gif">class="mathContainer hidden">class="mathCode"> and class="mathmlsrc">class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0375960116309641&_mathId=si4.gif&_user=111111111&_pii=S0375960116309641&_rdoc=1&_issn=03759601&md5=0e6bbbaa628834104953462e0dc97b67">class="imgLazyJSB inlineImage" height="16" width="78" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0375960116309641-si4.gif">class="mathContainer hidden">class="mathCode"> under the realistic experimental conditions.