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- Title
Terahertz Optoelectronics with Surface Plasmon Polariton Diode.
- Authors
Vinnakota, Raj K.; Genov, Dentcho A.
- Abstract
The field of plasmonics has experience a renaissance in recent years by providing a large variety of new physical effects and applications. Surface plasmon polaritons, i.e. the collective electron oscillations at the interface of a metal/semiconductor and a dielectric, may bridge the gap between electronic and photonic devices, provided a fast switching mechanism is identified. Here, we demonstrate a surface plasmon-polariton diode (SPPD) an optoelectronic switch that can operate at exceedingly large signal modulation rates. The SPPD uses heavily dopedp-n junction where surface plasmon polaritons propagate at the interface betweenn andp-type GaAs and can be switched by an external voltage. The devices can operate at transmission modulation higher than 98% and depending on the doping and applied voltage can achieve switching rates of up to 1 THz. The proposed switch is compatible with the current semiconductor fabrication techniques and could lead to nanoscale semiconductor-based optoelectronics.
- Subjects
OPTOELECTRONICS; SEMICONDUCTORS; OSCILLATIONS; SURFACE plasmons; DIODES
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep04899