Optical input impedance of nanostrip antennas
- 1 May 2012
- journal article
- Published by SPIE-Intl Soc Optical Eng in Optical Engineering
- Vol. 51 (5), 054002-1-054002-5
- https://doi.org/10.1117/1.oe.51.5.054002
Abstract
Abstract. We conduct an investigation into optical nanoantennas in the form of a strip dipole made from aluminum. With the finite-difference time domain simulation both optical input impedance and radiation efficiency of nanostrip antennas are addressed. An equivalent circuit is presented as well for the nanostrip antennas at optical resonances. The optical input resistance can be adjusted by varying the geometric parameters of antenna strips. By changing both strip area and strip length simultaneously, optical input resistance can be adjusted for matching impedance with an external feeding or loading circuit. It is found that the optical radiation efficiency does not change significantly when the size of a nanostrip antenna varies moderately.Keywords
This publication has 11 references indexed in Scilit:
- Engineering the Input Impedance of Optical Nano Dipole Antennas: Materials, Geometry and Excitation EffectIEEE Transactions on Antennas and Propagation, 2011
- Impedance Matching and Emission Properties of Nanoantennas in an Optical NanocircuitNano Letters, 2009
- Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical NanoantennasPhysical Review Letters, 2008
- Tuning the scattering response of optical nanoantennas with nanocircuit loadsNature Photonics, 2008
- Plasmonic laser antennaApplied Physics Letters, 2006
- Optical Microscopy via Spectral Modifications of a NanoantennaPhysical Review Letters, 2005
- Resonant Optical AntennasScience, 2005
- Optical antennas for nano-photonic applicationsNanotechnology, 2005
- Determination of the reflection coefficients of laser light of wavelengths λ∊(022 μm,200 μm) from the surface of aluminum using the Lorentz-Drude modelApplied Optics, 1990
- Temperature dependence of absorptance in laser damage of metallic mirrors: I MeltingJournal of the Optical Society of America, 1979