| Abstract: | A tunable plasmonic crystal comprises several periods in a
two-dimensional electron or hole gas plasmonic medium that is both
extremely subwavelength (.about..lamda./100) and tunable through the
application of voltages to metal electrodes. Tuning of the plasmonic
crystal band edges can be realized in materials such as semiconductors
and graphene to actively control the plasmonic crystal dispersion in the
terahertz and infrared spectral regions. The tunable plasmonic crystal
provides a useful degree of freedom for applications in slow light
devices, voltage-tunable waveguides, filters, ultra-sensitive direct and
heterodyne THz detectors, and THz oscillators. |