Quantum (digital-type) concepts are
gaining prominence over and above classical (analog-type) ones
in miniaturized devices where nanometer size can be less than
or equal to the de Broglie wavelength of an electron in any of
the three cartesian directions. An electric field driving electrons
in these devices can be extremely high. This converts random carrier
motion to a streamlined one, thereby limiting the velocity to
thermal velocity or Fermi velocity depending on the degeneracy
of the sample. This re-organization of the carrier velocities
makes familiar Ohm’s law invalid, thereby enhancing the role
of high-field velocity saturation in performance evaluation and
characterization of nanostructures. Further, a free flight of
a carrier may be interrupted by an emission of a quantum of energy
in the form of a phonon or photon. This emission further limits
the saturation velocity and also degrades the diffusion coefficient.
The seminar will demonstrate that a higher mobility does not necessarily
lead to a higher saturation velocity showing independence of the
saturation velocity on mobility-limiting scattering mechanisms.
A review of quantum-mechanical and high-field effects that have
impact on the design of optoelectronic devices and other micro-circuits
is presented.
EDS Distinguished Lecturer Professor
Arora obtained his Ph. D. degree from the University of Colorado.
He is currently a Professor of Engineering Management and Electrical
Engineering at Wilkes University, U.S.A. Professor Arora is on
the IEEE EDS Publication Committee, Chair of the IEEE Lehigh Valley
Student Activities Committee, and EDS representative in the IEEE-USA
Technology Policy Council. His research interests are in nanotechnology
and its applications. Professor Arora has authored or co-authored
over 140 papers on scientific, educational, and entrepreneurial
issues. Professor Arora is on the Distinguished Lecturer Program
of IEEE Electron Devices Society and APS Forum on Industrial and
Applied Physics. Recently, he was named a Leading Educator of
the World 2005, in addition to many Who’s Who recognitions.
Place:
Motorola
Schaumburg, Illinois
Time:
Social .........................................................................6:30pm.
Presentaion..................................................................7:00pm.
Attendance: 21
Members: 18
Non-Members: 3
