Related Experiment Video
Updated: Jun 18, 2026

07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
A silicon-based electrical source of surface plasmon polaritons.
Nature Materials
|December 8, 2009
Summary
Researchers developed a silicon-based electrical source for surface plasmon polaritons (SPPs). This breakthrough integrates plasmonics with CMOS technology, overcoming size mismatches in microelectronics and photonics.
Area of Science:
- Photonics and Plasmonics
- Microelectronics and Semiconductor Technology
Background:
- The integration of photonics with complementary metal oxide semiconductor (CMOS) electronics faces challenges due to significant size mismatches between microelectronic and micro-optical components.
- Surface plasmon polaritons (SPPs) offer a potential solution by enabling light confinement and control at sub-100 nm scales at metal/dielectric interfaces.
Discussion:
- While passive plasmonic devices are established, active plasmonic devices, particularly electrical sources of SPPs, are crucial for practical applications.
- Previous demonstrations of electrical SPP sources utilized organic semiconductors, limiting compatibility with established silicon-based microelectronic fabrication processes.
Key Insights:
- This study demonstrates a silicon-based electrical source for SPPs, fabricated using low-temperature microtechnology processes.
- The developed fabrication methods are compatible with back-end CMOS technology, paving the way for integrated silicon plasmonics.
Outlook:
- This work advances the field of silicon plasmonics, enabling the development of novel devices for optical communication and sensing.
- Further integration of electrical SPP sources with CMOS technology could lead to highly efficient and compact photonic integrated circuits.
Related Concept Videos
Types of Semiconductors
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
Potential Due to a Polarized Object
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
P-N junction
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

