Terahertz generation using plasmonic photoconductive gratings
By C. Berry, Mona Jarrahi. 2012
145 citations recorded by the source corpus.
A photoconductive terahertz emitter based on plasmonic contact electrode gratings is presented and experimentally demonstrated. The nanoscale grating enables ultrafast and high quantum efficiency operation simultaneously, by reducing the photo-generated carrier transport path to the photoconductor contact electrodes. The presented photoconductor eliminates the need for a short-carrier lifetime semiconductor, which limits the efficiency of conventional photoconductive terahertz emitters. Additionally, the photo-absorbing active area of the plasmonic photoconductive terahertz emitter can be increased without a significant increase in the capacitive loading to the terahertz radiating antenna, enabling high quantum-efficiency operation at high pump power levels by preventing the carrier screening effect and thermal breakdown. A plasmonic photoconductive terahertz emitter prototype based on the presented scheme is implemented and integrated with dipole antenna arrays on a semi-insulating In0.53Ga0.47As substrate. Emitted terahertz radiation is characterized in a terahertz time-domain spectroscopy setup, measuring a terahertz pulse width of 590 fs full-width at half maximum in response to 150 fs pump pulses at 925 nm.
Subfields: Biomedical Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/6e5dfdc8f19a7e63d86483b53db2c90b34783a55
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Biomedical Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- High-Power Terahertz Generation Using Large-Area Plasmonic Photoconductive Emitters (2015, unknown): “imity to the plasmonic gratings [28], [29].”
- Review of terahertz photoconductive antenna technology (2017, methodology): “ground and a 100/100 nm nanograting array incorporated into the electrodes.(164) These arrays, which were computationally studied in previous work,(165) increase the optical absorption, which takes place near the antenna electrodes.”