Biomedical Engineering Reference
In-Depth Information
Chapter 14
Passive and Active Nano-Antenna
Systems
Samel Arslanagi c,
a
Sawyer D. Campbell,
b
and
Richard W. Ziolkowski
c
a
Department of Electrical Engineering, Electromagnetic Systems, Technical University
of Denmark (DTU), Ørsteds Plads, Building 348, DK-2800, Kgs. Lyngby, Denmark
b
College of Optical Sciences, The University of Arizona, 1630 E. University Blvd., Tucson,
AZ 85721-0094, USA
c
Department of Electrical and Computer Engineering, The University of Arizona,
1230 E. Speedway Blvd., Tucson, AZ 85721-0104, USA
ziolkowski@ece.arizona.edu
Interesting theoretical and practical radiation and scattering effects
associated with passive and active core-shell nanoparticles (NPs)
have been investigated and will be reviewed. Both plane wave and
elementary Hertzian dipole excitations and a variety of gain media
have been examined. Optimal configurations at visible wavelengths
have been determined. Examples will illustrate how one can
engineer these nano-scatterers to have cross-sections significantly
larger than their geometrical size and how the corresponding nano-
antenna structures can be matched to local quantum emitters to act
asnano-amplifiersthatsignificantlyenhancethefar-fieldresponses.
On the contrary, it will be shown how they can also be designed to
actively jam these sources.
