13-01-2015, 04:49 AM
Hi,
I'm Hima, I would like to see Optical antenna power point presentation as i am giving a seminar on the same.
Awaiting the reply.
Best Regards,
Hima
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optical antenna ppt
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Hi,
I'm Hima, I would like to see Optical antenna power point presentation as i am giving a seminar on the same.
Awaiting the reply.
Best Regards,
Hima
09-03-2017, 02:42 PM
An optical antenna is a device that efficiently couples the energy of free space radiation to a confined region of sub-wavelength length size. While antennas are widespread in microwave and radiowave regimes, they are basically unexplored at optical frequencies. Because nanoscale devices need to interact with optical radiation, optical antennas are likely to have a large impact on future technology.
![[Image: antenna%20pic1.jpg]](http://www.optics.rochester.edu/workgroups/novotny/pictures/antenna%20pic1.jpg)
The concept of antennas is not new. They are the enabling technology in cell phones, satellite communications and many other devices that use electromagnetic radiation. However, its optical counterpart is basically nonexistent in today's technology. In contrast, optical radiation is manipulated by redirecting wave fronts with lenses and mirrors. Consequently, due to diffraction, it appears that the optical fields can not be located at dimensions much smaller than the optical wavelength. Optical antennas are a solution to the mismatch between the small dimensions of nanoscale devices and the length scale associated with optical wavelengths. Optical antennas can be expected to be used to artificially enhance the absorption cross-section or quantum yield of optoelectronic devices (eg, solar cells), to efficiently release energy from nanoscale devices (eg LED lighting) and Increase the efficiency of biochemical components Detectors that depend on a different spectroscopic response (Raman scattering, fluorescence, etc.).
The concept of antennas is not new. They are the enabling technology in cell phones, satellite communications and many other devices that use electromagnetic radiation. However, its optical counterpart is basically nonexistent in today's technology. In contrast, optical radiation is manipulated by redirecting wave fronts with lenses and mirrors. Consequently, due to diffraction, it appears that the optical fields can not be located at dimensions much smaller than the optical wavelength. Optical antennas are a solution to the mismatch between the small dimensions of nanoscale devices and the length scale associated with optical wavelengths. Optical antennas can be expected to be used to artificially enhance the absorption cross-section or quantum yield of optoelectronic devices (eg, solar cells), to efficiently release energy from nanoscale devices (eg LED lighting) and Increase the efficiency of biochemical components Detectors that depend on a different spectroscopic response (Raman scattering, fluorescence, etc.).
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