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<p class="MsoTitle" style="margin-right:-.5in"><b style="mso-bidi-font-weight:
normal"><span style="font-size:8.0pt;mso-bidi-font-size:12.0pt;font-family:
"Times New Roman""><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><b style="mso-bidi-font-weight:
normal"><span style="letter-spacing: 1.5pt; ">Modern Optics and Spectroscopy</span></b><span style="font-family:Arial;
letter-spacing:1.5pt"><o:p></o:p></span></font></p>
<p class="MsoNormal" align="center" style="text-align:center"><b style="mso-bidi-font-weight:
normal"><span style="font-family: Arial; letter-spacing: 1pt; "><o:p><font class="Apple-style-span" size="4"> </font></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="color: black; "><font class="Apple-style-span" size="4">Lighting up tightly confined photon modes in plasmonic nanostructures</font></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><b style="mso-bidi-font-weight:
normal">Nicholas Xuanlai Fang</b><span style="letter-spacing: 1pt; ">,<o:p></o:p></span></font></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><o:p><font class="Apple-style-span" size="4"> </font></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4">Massachusetts Institute of Technology<o:p></o:p></font></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><o:p><font class="Apple-style-span" size="4"> </font></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span style="letter-spacing: 1pt; ">Tuesday, May 1, 2012</span><span class="Apple-style-span" style="letter-spacing: 1px; "> </span></font></p>
<p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="letter-spacing: 1px; ">12:00-1:00 p.m.</span><span class="Apple-style-span" style="font-family: Times; "> </span></font></p>
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<span style="font-family:Calibri;mso-bidi-font-family:
Calibri"><o:p><font class="Apple-style-span" size="4"> </font></o:p></span></p>
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<font class="Apple-style-span" size="4"><span style="font-family: Calibri; ">Plasmon enhanced photon absorption and emission in nanostructures plays an important role in many applications such as nanoantennas and nanolasers. In this talk, I will discuss our
development of optical and electron probes for investigation of plasmonic nanostructures.<span style="mso-spacerun:yes">
</span>In particular, the dark modes with “forbidden” photon transitions in subwavelength nanocavities are of great interest, as they promise energy conversion with high quantum efficiency. Using a focused electron beam spot, we selectively excite plasmons
from the metallized nanocavities with fine spatial resolution (<20nm) at real-time.<span style="mso-spacerun:yes">
</span>The measured high resolution spectrum reveals unexpected high photon counts associated with signatures of the dark modes, in contrast to common wisdom that such dark modes only couple weakly to the far field. I will also discuss the potential application
of these plasmonic devices with ultra-small mode volume and high Purcell factors.</span><o:p></o:p></font></p>
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<span style="font-family:Calibri;mso-bidi-font-family:
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<p class="MsoNormal"><font class="Apple-style-span" size="4"><span style="mso-spacerun:yes">
<span class="Apple-tab-span" style="white-space:pre"></span></span>Grier Room, MIT Bldg 34-401<o:p></o:p></font></p>
<p class="MsoNormal" align="center" style="text-align:center"><font class="Apple-style-span" size="4">Refreshments served after the lecture</font><font class="Apple-style-span" size="6"><o:p></o:p></font></p>
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