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<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3> COLOQUIOS DEL
DEPARTAMENTO DE
FÍSICA<BR>
FCEyN -
UBA<BR><BR>
Charla, café
y galletitas<BR> En
el Aula Federman, 1er piso Pabellón
I.<BR>
Ciudad Universitaria</FONT>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3>
El próximo jueves 24 de abril a las 14 hs<FONT face=Arial
size=2> </FONT></FONT></FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2><FONT face="Times New Roman"
size=3> <STRONG><FONT
size=6> </FONT></STRONG></FONT></FONT><SPAN
style="FONT-SIZE: 24pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-bidi-font-weight: bold"><SPAN
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lang=ES-AR
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face="Times New Roman"><SPAN
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lang=ES-AR
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face="Times New Roman"><SPAN
style="FONT-SIZE: 24pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-bidi-font-weight: bold"><SPAN
class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><SPAN
style="FONT-SIZE: 26pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
lang=ES-AR
style="FONT-SIZE: 26pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN
style="FONT-SIZE: 22pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><SPAN><FONT
face="Times New Roman" size=5><SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><STRONG><FONT
size=6>En</FONT> <FONT size=6>busca de la
superlente</FONT></STRONG></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN><SPAN
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class=MquinadeescribirHTML2><SPAN lang=ES-AR
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lang=ES-AR
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size=5><SPAN><FONT face="Times New Roman"><SPAN
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lang=ES-AR
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style="FONT-SIZE: 22pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><FONT
size=5><SPAN><FONT face="Times New Roman"><SPAN lang=ES-AR
style="FONT-SIZE: 14pt"><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office"
/><o:p></o:p></SPAN> </FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></DIV>
<DIV><SPAN
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lang=ES-AR
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class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><SPAN
style="FONT-SIZE: 26pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
lang=ES-AR
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style="FONT-SIZE: 22pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'"><FONT
size=5><SPAN><FONT face="Times New Roman"><STRONG><FONT
size=6></FONT></STRONG> </DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
size=3><SPAN
style="mso-spacerun: yes"> </SPAN></FONT><STRONG>Roberto
Merlín</STRONG></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR><FONT
size=4><SPAN
style="mso-spacerun: yes"><EM> </EM> </SPAN>University
of Michigan<BR></P><o:p></o:p></FONT></SPAN>
<DIV></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></SPAN></SPAN><FONT
face=Arial size=2><FONT face=Arial size=2><FONT face=Arial size=2><SPAN
lang=EN-GB
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 10.0pt; mso-ansi-language: EN-GB; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA; mso-bidi-font-family: Arial"><FONT
face="Times New Roman"
size=3> </FONT></SPAN><FONT
face=Arial size=2><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><FONT
face="Times New Roman"
size=3>
</FONT></SPAN></DIV>
<DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=ES-AR
style="mso-ansi-language: ES-AR"></SPAN>-----------------------------------------------------------------------------------------------------------------------------------------------</P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><BR> </P></DIV>
<DIV><FONT face="Times New Roman" size=3>RESUMEN:</FONT></DIV>
<DIV><SPAN style="mso-ansi-language: ES"><O:P><FONT face="Times New Roman"
size=3> </FONT></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P></O:P></SPAN><SPAN
style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><SPAN class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><FONT
face="Century Gothic" color=black><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><SPAN lang=ES-AR
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
lang=ES-AR
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
lang=ES-AR
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial; mso-bidi-font-size: 10.0pt; mso-ansi-language: ES-AR; mso-bidi-font-family: 'Times New Roman'"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
lang=ES-AR>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"><SPAN
style="mso-ansi-language: ES">En la primera parte de la charla hablaremos de
cómo la óptica de campo cercano,<SPAN style="mso-spacerun: yes"> </SPAN>o
sub-longitud de onda (sub</SPAN><SPAN
style="FONT-FAMILY: Symbol; mso-ansi-language: ES; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><SPAN
style="mso-char-type: symbol; mso-symbol-font-family: Symbol">l</SPAN></SPAN><SPAN
style="mso-ansi-language: ES">), experimentó un enorme crecimiento en los
últimos años, especialmente a partir de los trabajos de John Pendry acerca de
superlentes basadas en láminas delgadas con índice de refracción negativo.
Discutiremos como el límite de resolución propuesto por Abbe en 1873 está
relacionado con el principio de incerteza de Heisenberg y cómo se puede romper
el límite de difracción sin violar ninguna ley física.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"><SPAN
style="mso-ansi-language: ES"> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"><SPAN
style="mso-ansi-language: ES"><SPAN style="mso-spacerun: yes"> </SPAN>En la
segunda parte, introduciremos el concepto de placas de campo cercano
(“near-field plates”). Estas estructuras proveen un enfoque sub</SPAN><SPAN
style="FONT-FAMILY: Symbol; mso-ansi-language: ES; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><SPAN
style="mso-char-type: symbol; mso-symbol-font-family: Symbol">l</SPAN></SPAN><SPAN
style="mso-ansi-language: ES"> a frecuencia arbitraria, usando una propiedad de
las ecuaciones de Maxwell hasta ahora inexplorada. La distribución de campo
electromagnético sub</SPAN><SPAN
style="FONT-FAMILY: Symbol; mso-ansi-language: ES; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><SPAN
style="mso-char-type: symbol; mso-symbol-font-family: Symbol">l</SPAN></SPAN><SPAN
style="mso-ansi-language: ES"> se asemeja a la de las láminas de índice de
refracción negativo. La estructura diseñada está relacionada a la de una lente
de Fresnel en cuanto la difracción fuerza al campo incidente a converger. Sin
embargo, en esta superlente el enfoque se produce por un tipo de interferencia
cuyo origen es, sorprendentemente, electro- o magnetoestático. Las
implementaciones prácticas de esta superlente prometen aplicaciones en las áreas
de almacenamiento de datos, sensado sin contacto, imágenes de alta
resolución<SPAN style="mso-spacerun: yes"> </SPAN>y nanolitografia.
Presentaremos resultados experimentales para una superlente de microondas,
demostrando un enfoque </SPAN><SPAN lang=EN-US
style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><SPAN
style="mso-char-type: symbol; mso-symbol-font-family: Symbol">l</SPAN></SPAN><SPAN
style="mso-ansi-language: ES">/20 de radiación de 1 GHz. <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 36pt"></SPAN><SPAN
lang=ES-AR></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 42.7pt 0pt 29.75pt; LINE-HEIGHT: 150%; TEXT-ALIGN: justify"></FONT></SPAN><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT
size=3></FONT></SPAN></P><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT
size=3></FONT></SPAN></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN></DIV>
<DIV align=justify><SPAN style="mso-ansi-language: ES"><O:P><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 18pt; mso-bidi-font-size: 12.0pt"><FONT
face="Times New Roman"><SPAN class=MquinadeescribirHTML2><SPAN lang=ES-AR
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT face="Times New Roman"><FONT
face="Century Gothic" color=black><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Century Gothic'"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3><SPAN
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><FONT
size=3><SPAN lang=ES-AR style="mso-ansi-language: ES-AR"><SPAN lang=ES-AR
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
lang=ES-AR
style="FONT-SIZE: 16pt; COLOR: black; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-ansi-language: ES-AR; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-bidi-language: AR-SA"><SPAN
lang=ES-AR
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial; mso-bidi-font-size: 10.0pt; mso-ansi-language: ES-AR; mso-bidi-font-family: 'Times New Roman'"><FONT
face="Times New Roman"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><SPAN
style="FONT-SIZE: 16pt; mso-bidi-font-size: 12.0pt"><FONT size=3><SPAN
style="FONT-SIZE: 20pt; mso-bidi-font-size: 12.0pt"><FONT size=3><FONT
face=Arial
size=2>-----------------------------------------------------------------------------------------------------------------------------------------</FONT>
<P class=MsoNormal
style="MARGIN: 0cm 42.7pt 0pt 29.75pt; LINE-HEIGHT: 150%; TEXT-ALIGN: justify"></FONT><FONT
face=Arial size=2>Estan todos
invitados!</FONT></SPAN></P></FONT></SPAN></SPAN></FONT></SPAN></SPAN></FONT></SPAN></FONT></SPAN></SPAN></SPAN></FONT></SPAN></FONT></SPAN></FONT></SPAN></FONT></FONT></SPAN></SPAN></FONT></SPAN></SPAN></SPAN></O:P></SPAN></DIV></FONT></FONT></FONT></FONT></FONT></DIV></BODY></HTML>