Journal
NANO LETTERS
Volume 10, Issue 4, Pages 1229-1233Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl9037278
Keywords
Photodetector; antenna; Mie resonance; nanophotonics; nanowire
Categories
Funding
- Multidisciplinary University Research Initiative (MURI) under the Air Force Aerospace Research OSR [FA9550-06-1-0470]
- SPIE
Ask authors/readers for more resources
On-chip optical interconnection is considered as a substitute for conventional electrical interconnects as microelectronic circuitry continues to shrink in size. Central to this effort is the development of ultracompact, silicon-compatible, and functional optoelectronic devices. Photodetectors play a key role as interfaces between photonics and electronics but are plagued by a fundamental efficiency-speed trade-off. Moreover, engineering of desired wavelength and polarization sensitivities typically requires construction of space-consuming components. Here, we demonstrate how to overcome these limitations in a nanoscale metal-semiconductor-metal germanium photodetector for the optical communications band. The detector capitalizes on antenna effects to dramatically enhance the photoresponse (>25-fold) and to enable wavelength and polarization selectivity. The electrical design featuring asymmetric metallic contacts also enables ultralow dark currents (similar to 20 pA), low power consumption, and high-speed operation (> 100 GHz). The presented high-performance photodetection scheme represents a significant step toward realizing integrated on-chip communication and manifests a new paradigm for developing miniaturized optoelectronics components.
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