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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Subject:
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<td>Physics Colloquium March 30th</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date: </th>
<td>Tue, 27 Mar 2018 20:51:26 +0000</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From: </th>
<td>Wilkinson, Ellie V <a class="moz-txt-link-rfc2396E" href="mailto:evwilk@wm.edu"><evwilk@wm.edu></a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:physics2017@physics.wm.edu">physics2017@physics.wm.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:physics2017@physics.wm.edu"><physics2017@physics.wm.edu></a></td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">CC: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:undergrads2017@physics.wm.edu">undergrads2017@physics.wm.edu</a>
<a class="moz-txt-link-rfc2396E" href="mailto:undergrads2017@physics.wm.edu"><undergrads2017@physics.wm.edu></a></td>
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v:shapes="Picture_x0020_1" class="" align="left" hspace="12"
height="188" width="188"><!--[endif]--><b><u><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#00B050">PHYSICS COLLOQUIUM</span></u></b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">Friday, March 30, 2018<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">4:00 PM
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">Small Hall, Room 111<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> <o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:14.0pt;font-family:"Times New
Roman",serif">Bahram Roughani</span></b><b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> [
</span></b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">Host: W. Deconinck]<b>
</b><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">Loyola University Maryland
<br>
<b><br>
Title of Talk: </b></span><b><span
style="font-size:14.0pt;font-family:"Times New
Roman",serif;color:#00B050">Raman scattering
correlation with crystallographic orientation of Si cut
off axis</span></b><b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><u><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif;color:#00B050">Abstract:</span></u></b><b><u><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p></o:p></span></u></b></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">Raman spectroscopy is the inelastic
scattering of light by matter, a process which provides
important insight into the structure and properties of
materials. This laser spectroscopy technique provides
non-destructive and non-contact analysis with high spatial
resolution up to sub-micron scale and requires no sample
preparation. Raman scattering of solids represent
vibrational modes that are directly linked to the crystal
symmetry. Therefore, intensity analysis of Raman modes
provides information about crystal properties. We have
leveraged this characteristics to develop a new approach in
polarized backscattered Raman spectroscopy that can identify
the crystallographic orientation of silicon cut off axis.
Our theoretical model is developed using Raman tensors for
backscattering geometry that predicts variations in the
backscattering polarized Raman intensity profiles as a
function of the rotating wafers about the lab z-axis. A
comparison between the experimental spectra and theoretical
model will be presented, and specific Raman spectra
signatures that are correlated with the degree of off-axis
cut for single crystals of Si wafers will be discussed. Our
model suggests a quick and nondestructive approach for
determining the off-axis cut of single crystal Si wafers,
which is the most commonly used substrate material in
semiconducting device fabrications.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><br>
</span><b><i><span style="font-family:"Times New
Roman",serif">Cookies & Coffee will be served
in Small 122 at 3:30pm<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman",serif;color:black">******</span><span
style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Monotype
Corsiva";color:#1F497D">Eleonor V. Wilkinson</span></b><span
style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia",serif;color:black">Administrative
& Office Specialist
</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Georgia",serif">William
& Mary<span style="color:black">-Physics<br>
Small Hall, Room 123<br>
300 Ukrop Way<br>
Williamsburg, VA 23185</span></span><span
style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Times New
Roman",serif;color:black">Telephone: 757-221-3503</span><span
style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Times New
Roman",serif;color:black">Fax: 757-221-3540</span><span
style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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