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| Author |
Bharadwaj, Palash; Deutsch, Bradley; Novotny, Lukas |
| Title |
Optical Antennas |
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Journal Article |
| Year |
2009 |
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Advances in Optics and Photonics |
Abbreviated Journal |
Adv. Opt. Photon |
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1 |
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438-483 |
| Keywords |
optical antennas |
| Abstract |
Optical antennas are an emerging concept in physical optics. Similar to radiowave
and microwave antennas, their purpose is to convert the energy of free propagating radiation to localized energy, and vice versa. Optical antennas exploit the unique properties of metal nanostructures, which behave as strongly coupled plasmas at ptical frequencies. The tutorial provides an account of the historical origins and the basic concepts and parameters associated with optical antennas. It also reviews recent work in the field and discusses areas of application, such as light-emitting devices, photovoltaics, and spectroscopy. |
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RPLAB @ gujma @ |
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754 |
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Boreman, Glenn D. |
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Infrared microantennas |
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| Year |
1997 |
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SPIE |
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SPIE |
| Volume |
3110 |
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882-885 |
| Keywords |
optical antennas |
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We present results of mesurments of the polarization response of asymetric spiral antennas coupled Ni-NiO-Ni diodes, over the wavelength range 10.2 to 10.7 μm. The feed structure of the antenna imposes an elliptical polarization singature that is different from the circular polarization expected from a symmetric spiral. We develop a lossy-transmission-line model yielding the measured polarization response. A combination of a balanced and an unbalanced mode is required. Reflected current waves from the arm ends are significant. |
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RPLAB @ gujma @ |
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755 |
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Heeres, R.W.; Dorenbos, S.N.; Koene, B.; Solomon, G.S.; Kouwenhoven, L.P.; Zwiller, V. |
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On-Chip Single Plasmon Detection |
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Journal Article |
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2010 |
Publication |
Nano Letters |
Abbreviated Journal |
Nano Lett. |
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10 |
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661-664 |
| Keywords |
optical antennas; SSPD; Single surface plasmons; superconducting detectors; semiconductor quantum dots; nanophotonics |
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Surface plasmon polaritons (plasmons) have the potential to interface electronic and optical devices. They could prove extremely useful for integrated quantum information processing. Here we demonstrate on-chip electrical detection of single plasmons propagating along gold waveguides. The plasmons are excited using the single-photon emission of an optically emitting quantum dot. After propagating for several micrometers, the plasmons are coupled to a superconducting detector in the near-field. Correlation measurements prove that single plasmons are being detected. |
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RPLAB @ akorneev @ |
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620 |
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Kawakami, A; Saito, S.; Hyodo, M. |
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Fabrication of nano-antennas for superconducting Infrared detectors |
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Journal Article |
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2011 |
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IEEE Trans. Appl. Supercond. |
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21 |
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3 |
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632-635 |
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optical antennas, NbN/MgO/NbN/TiN/Al HEB, dipole antennas, IR, infrared |
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To improve the response performance of superconducting infrared detectors, we have developed a fabrication process for nano-antennas. A nano-antenna consists of a dipole antenna, and a superconducting thin film strip placed in the antenna's center. By measuring the transition temperature of the superconducting strips, we confirmed that their superconductivity maintained a good condition after the nano-antenna fabrication process. We also evaluated nano-antenna characteristics using Fourier transform infrared spectroscopy. The evaluated antenna length and width were respectively set at around 2400 nm and 400 nm, and the antennas were placed at intervals of several micrometers around the area of 1 mm2 . In an evaluation of spectral transmission characteristics, clear absorption caused by antenna effects was observed at around 1400 cm-1. High polarization dependencies were also observed. |
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761 |
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Tang, Liang; Kocabas, Sukru Ekin; Latif, Salman; Okyay, Ali K.; Ly-Gagnon, Dany-Sebastien; Saraswat, Krishna C.; Miller, David A. B. |
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Nanometre-scale germanium photodetector enhanced by a near-infrared dipole antenna |
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Journal Article |
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2008 |
Publication |
Nature Photonics |
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2 |
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226-229 |
| Keywords |
optical antennas |
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A critical challenge for the convergence of optics and electronics is that the micrometre scale of optics is significantly larger than the nanometre scale of modern electronic devices. In the conversion from photons to electrons by photodetectors, this size incompatibility often leads to substantial penalties in power dissipation, area, latency and noise. A photodetector can be made smaller by using a subwavelength active region; however, this can result in very low responsivity because of the diffraction limit of the light. Here we exploit the idea of a half-wave Hertz dipole antenna (length approx 380 nm) from radio waves, but at near-infrared wavelengths (length approx 1.3 microm), to concentrate radiation into a nanometre-scale germanium photodetector. This gives a polarization contrast of a factor of 20 in the resulting photocurrent in the subwavelength germanium element, which has an active volume of 0.00072 microm3, a size that is two orders of magnitude smaller than previously demonstrated detectors at such wavelengths. |
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