Fundamental Physics of Carbon-Based Nanostructures for Infrared and Ultraviolet Detection
Abstract
Carbon-based nanostructures including nanotubes (CNTs) and graphene have superior electronic, optoelectronic and mechanical properties, which provide fresh opportunities for designs of novel devices of extraordinary performance in addition to the benefits of low cost, large abundance, and light weight. Our recent demonstrations of uncooled detectivity in exceeding 109 cm?Hz1/2/W on individual multiwall CNT infrared detectors with asymmetric Schottky contacts, responsivity is similar to 1.62 A/W?V on the ZnO nanowire/graphene hybrid ultraviolet detectors, and responsivity above 20 mA/W on thin-gate plasmonic graphene broad-band photo detectors highlight a few examples developed under our prior ARO support. The proposed research aims at understanding the fundamental physics governing the optoelectronic behaviors in these nanostructures, and based on which exploring novel device schemes that enable manipulation of photon absorption, exciton dissociation and charge and phonon transport at nanoscales. Micro/nanofabrication schemes for scaling up these devices will also be in consideration for compatibility with Si-based readout circuits. The overall goal of this project is to achieve a thorough understanding of the basic physics underlying the photo detection and to develop higher- performance carbon-based nanostructure photo detectors for uncooled infrared and ultraviolet detection to meet Armys requirements of high sensitivity, light weight, and low cost.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 25, 2017
- Accession Number
- AD1058588
Entities
People
- Judy Z. Wu
Organizations
- University of Kansas