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BEGIN:VEVENT
DTSTAMP:20261021T123157Z
LAST-MODIFIED:20140423T131805Z
DTSTART:20140508T140000Z
DTEND:20140508T150000Z
UID:event1277@bu.edu
URL:http://physics.bu.edu/internal/events/show/1277
SUMMARY:Near-Field Interactions in Terahertz Metamaterials:  Complex\, Tuna
	ble\, and Nonlinear Material Responses at Terahertz Frequencies
DESCRIPTION:Featuring George Keiser\n\nPart of the Departmental Seminars.\n
	\nDissertation Committee: \n\nAbstract:\nMetamaterials (MM) research contin
	ues to bear fruit in the form of novel devices and optics across the electr
	omagnetic spectrum. This is especially true at terahertz (THz) frequencies\
	, where MM based optics\, absorbers\, and detectors have helped to close th
	e so called ‘terahertz gap.’ Additionally\, MMs provide a platform for 
	the creation of localized regions of electric field amplification\, termed 
	electric field enhancement\, which pave the way for new spectroscopic studi
	es of nonlinear material responses at THz frequencies.  Finally\, recent de
	velopments in nonlinear MMs allow for the creation of strong optical nonlin
	earities at THz frequencies\, promising new applications for MMs as nonline
	ar THz optics such as saturable absorbers.\n\nDespite this significant prog
	ress\, the design of MM devices with dynamically tunable and broad-bandwidt
	h responses is challenging\, the methods to control the electric field enha
	ncement within the MM unit cell are limited\, and the study of MM nonlinear
	ities is still in its initial stages. In this seminar\, I will review the s
	tudy of near field interactions\, or coupling\, in MM designs.  I will pres
	ent the results of several MM experiments that highlight how the manipulati
	on of interactions within the MM unit cell can help to overcome the obstacl
	es in the path towards broad-bandwidth MMs\, control over MM electric field
	 enhancement\, and the design of nonlinear MMs.\n\n![George](/resources/eve
	nt-image/1277/b835b3f_small)
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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