Journal
ACS NANO
Volume 11, Issue 2, Pages 1719-1727Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b07578
Keywords
Tamm plasmons; surface plasmons; hot electrons; photodetector; photoresponsivity
Categories
Funding
- National Natural Science Foundation of China [61675142]
- Youth 973 Program [2015CB932700]
- Ph.D. Programs Foundation of the Ministry of Education of China [20133201110021]
- Natural Science Foundation of Jiangsu Province of China [BK20141200]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
Ask authors/readers for more resources
There is an increasing interest in harvesting photoejected hot-electrons for sensitive photodetectors, which have highly tunable detection wavelengths controlled by structural engineering rather than the classic doped semiconductors. However, the widely employed metallic nanostructures that excite surface plasmons (SPs) to enhance the photoemission of hot-electrons are usually complex with a high fabrication challenge. Here, we present purely planar hot-electron photodetector based on Tamm plasmons (TPs) by introducing a distributed Bragg reflector integrated with hot-electron collection layers in metal/semiconductor/metal configuration. Results show that the light incidence can be strongly confined in the localized region between the top metal and the adjacent dielectric layer due to the excitation of TP resonance so that more than 87% of the light incidence can be absorbed by the top metal layer. This enables a strong and unidirectional photocurrent and a photoresponsivity that can even be higher than that of the conventional nanostructured system. Moreover, the planar TP system shows a narrow-band resonance with high tunability, good resistance against the change of the incident angle, and the possibility for extended functionalities. The proposed TP-based planar configuration significantly simplifies the conventional SP-based systems and opens the pathway for high performance, low-cost, hot-electron photodetection.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available