<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><!--StartFragment--><p class="MsoTitle" style="margin-right:-.5in"><span style="font-family:"Times New Roman""><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><span class="Apple-tab-span" style="white-space:pre"> </span>Seminar
on<o:p></o:p></span></font></b></span></p><p class="MsoTitle" style="margin-right:-.5in"><span style="font-family: 'Times New Roman'; "><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1.5pt; "><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Modern Optics and Spectroscopy<o:p></o:p></span></font></b></span></p>
<div class="MsoNormal"><span style="font-family: Arial; letter-spacing: 1pt; "><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> <o:p></o:p></span></font></b></span></div><p class="MsoNormal" align="center" style="text-align:center"><span class="apple-style-span"><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Optical antennas for
enhanced light-matter interactions </span></font></b></span><span style="font-family: Arial; letter-spacing: 1pt; "><b><i><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br></span></font>
</i></b></span><span style="letter-spacing: 1pt; "><b><i><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><o:p></o:p></span></font></i></b></span></p><p class="MsoNormal" align="center" style="text-align:center"><b><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Lukas Novotny</span></font></b><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">, <o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">University of Rochester</span></font></span><span class="Apple-style-span" style="font-size: 14px; letter-spacing: 1px; "> </span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">Tuesday, March 8, 2011</span></font></span><span class="Apple-style-span" style="font-size: 14px; letter-spacing: 1px; "> </span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">12:00 – 1:00 p.m.<o:p></o:p></span></font></span></p><p class="MsoNormal" align="center" style="text-align:center"><span style="font-family: Arial; letter-spacing: 1pt; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"> </span></font></span></p><p class="MsoNormal"><span style="font-family: Times; "><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"></span></font></span><span class="Apple-style-span" style="font-size: 14px; ">Antennas' are a
well-established concept in the radiowave and microwave regime, but they are</span></p><p class="MsoNormal"><span style="font-family:"""><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;">conspicuously absent in
optical, infrared, and even terahertz technologies. The absence of optical
antennas in technological applications is primarily associated with their small
scale. Antennas have characteristic dimensions on the order of a wavelength,
demanding fabrication accuracies better than 10nm for the optical frequency
regime. The advent of nanoscience and nanotechnology provides access to this
length scale but material challenges associated with optical antennas remain.
For example, the penetration of radiation into metals can no longer be
neglected. The electromagnetic response is then dictated by collective electron
oscillations (plasmons) characteristic of a strongly coupled plasma. These
collective excitations make a direct downscaling of traditional antenna designs
impossible and demand the careful study of plasmon resonances in metal
nanostructures. The introduction of the antenna concept into the optical,
infrared and terahertz frequency regime holds promise for a wide range of novel
technological applications. Optical antennas can be employed to enhance the
e_ciency of photovoltaics, to release energy from nanoscale light-emitting
devices, and to boost the e_ciency of photochemical or photophysical detectors. In this presentation, I will outline
the physical properties of optical antennas, review relevant history and recent
work, and provide future perspectives of this rapidly evolving _eld of study.</span></font></span><font class="Apple-style-span" size="4"><span class="Apple-style-span" style="font-size: 14px;"><o:p></o:p></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="font-size: 14px;"> <o:p></o:p></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="font-size: 14px;">Grier Room, MIT Bldg 34-401<o:p></o:p></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="font-size: 14px;">Refreshments served after the lecture</span></font><o:p></o:p></p>
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