Plasmonic Light-Harvesting Devices for Biosensing and Optoelectronic Modulation
Abstract
The goal of this project was to design different plasmonic nanostructures that can gather light from the far-field and concentrate its energy into a volume only a few nanometers across, thereby achieving enormous enhancement in energy densities for various applications. New fabrication technologies were developed. One example is the development of cost-effective electron beam lithography techniques that achieved sub-10-nm diameter with a pitch of ~34 nm resolution. Prototypes using these new fabrication techniques were also demonstrated. There was the successful first demonstration of localized surface plasmon resonance sensing based on fundamental magnetic resonance in the visible spectrum using ultra small gold v-shaped split ring resonators. Another example was a n-InAsSb/n-GaSb heterostructure photodiode integrated with plasmonic two-dimensional subwavelength hole array (2DSHA) for room temperature two band photodetection to ~1.4 109 Jones and ~1.5 1011 Jones for the two bands peaked at 3.4 m and 1.7 m, respectively. These are just a couple of innovative ways of controlling light to extend and improve the-state-of-the-art technology in nanoplasmonics and metamaterials, allowing for efficient low-power-consumption harvesting of light on the nanoscale for biosensing and optoelectronic
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 12, 2020
- Accession Number
- AD1109150
Entities
People
- Dao-hua Zhang
Organizations
- Nanyang Technological University