Yagi-Uda nanoantenna enhanced metal-semiconductor-metal photodetector
Abstract
An array of 400 nanolithographic Yagi-Uda antennas on a metal-semiconductor-metal rectifier photodetector demonstrates control of wavelength selectivity and directivity. The nanoantenna array response is obtained using a direct electrical measurement approach. Resonances in rectified photocurrent are detected at the incident electromagnetic radiation of free-space wavelengths 1110 nm and 1690 nm, corresponding to scaled effective wavelengths of 388 nm and 776 nm, respectively. The scaling is consistent with a theory based on plasmonic effects in nanoscale devices at optical frequencies, and the two resonant wavelength modes are found to match at, respectively, full-wavelength and half-wavelength operation of the detector dipole element. Quantum efficiencies are estimated as 5.1% and 3.1% at 1110 nm and 1690 nm wavelengths, respectively, representing a fourfold increase over a device lacking the antenna array.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 09, 2018
- Source ID
- 10.1063/1.5038339
Entities
People
- Hang Ruan
- J. J. Heremans
- R. Claus
- W. Rieger
- Y. Kang
Organizations
- National Aeronautics and Space Administration
- United States Navy
- Virginia Tech