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Tunable Graphene Plasmonics for Terahertz Filters, Detectors and Modulators

Dr. Thomas E. Murphy

Professor, Department of Electrical & Computer Engineering
Director, Institute for Research in Electronics & Applied Physics
University of Maryland

Date:  Thursday, November 19, 2015

Time:  5:30 Reception, Dinner (Optional) 6:00 pm, Lecture 7:00

Place: American Center for Physics,  One Physics Ellipse, College Park, MD 20740

Directions: Map

Free parking.

All IEEE members and guests are welcome to attend. 

Cost: Lecture and reception free, optional Dinner $10

Please RSVP (Dinner only) to Roger Kaul, by November 17th


When a conductor is illuminated with light, its electrons can oscillate in collective motion called a plasmon resonance. In metals, these plasmons occur at visible wavelengths, but in graphene the motion happens at much slower terahertz frequencies, and the resonant frequency can be electrostatically tuned by applying a voltage.  Graphene plasmonics has the potential to revolutionize terahertz technology – the last great underdeveloped frequency band of electromagnetic waves.  Tunable graphene plasmonic resonators have been suggested for use in terahertz filters, modulators, detectors, and emitters, and could find widespread applications in science, medicine, security, and communications.  This presentation will discuss progress in the development of practical graphene-based plasmonic devices, and recent experimental measurements and theoretical models that exploit plasmonic resonances for terahertz detection, filtering, and modulation.



Thomas E. Murphy received bachelors degrees in Electrical Engineering and Physics from Rice University in 1994.  He then studied Electrical and Computer Engineering at Massachusetts Institute of Technology, receiving the MS degree in 1997 and Ph.D degree in 2001.  He was employed as a member of the technical staff at MIT Lincoln Laboratory from 2001-2002, and joined the faculty at the University of Maryland in 2002.  He currently holds a joint appointment as a Professor in the Department of Electrical & Computer Engineering and Director of the Institute for Research in Electronics & Applied Physics.  His research interests include terahertz and microwave photonics, two-dimensional optoelectronics, integrated optics, nonlinear and ultrafast optics, electrooptics, and nonlinear dynamical systems. 



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