Abstract
The focusing properties of phase correcting Fresnel lenses with small values of focal length - to - diameter (FID) and with focal lengths of two wavelengths or less are investigated. For these lenses, the paraxial approximation for the Reyleigh resolution criterion is no longer valid. For Fresnel lenses designed with F/D < 0.2 and F ≤ λ, spatial resolutions of less than 0.5λ are possible, which is finer than what can typically be achieved for conventional (paraxial) designs. The spot beams in these cases are not quite axially symmetrical due to the presence of anti-symmetric field components, which vanish for larger values of F/D.
| Original language | English |
|---|---|
| Title of host publication | IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics |
| Pages | 170 |
| Number of pages | 1 |
| DOIs | |
| Publication status | Published - 2006 |
| Externally published | Yes |
| Event | IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics - Shanghai, China Duration: 18 Sep 2006 → 22 Sep 2006 |
Conference
| Conference | IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics |
|---|---|
| Country | China |
| City | Shanghai |
| Period | 18.9.06 → 22.9.06 |
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ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
FDTD analysis of a flat diffractive optics with sub-Reyleigh limit resolution in MM/THz waveband. / Minin, I. V.; Minin, Oleg V.; Gagnon, N.; Petosa, A.
IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics. 2006. p. 170 4222112.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - FDTD analysis of a flat diffractive optics with sub-Reyleigh limit resolution in MM/THz waveband
AU - Minin, I. V.
AU - Minin, Oleg V.
AU - Gagnon, N.
AU - Petosa, A.
PY - 2006
Y1 - 2006
N2 - The focusing properties of phase correcting Fresnel lenses with small values of focal length - to - diameter (FID) and with focal lengths of two wavelengths or less are investigated. For these lenses, the paraxial approximation for the Reyleigh resolution criterion is no longer valid. For Fresnel lenses designed with F/D < 0.2 and F ≤ λ, spatial resolutions of less than 0.5λ are possible, which is finer than what can typically be achieved for conventional (paraxial) designs. The spot beams in these cases are not quite axially symmetrical due to the presence of anti-symmetric field components, which vanish for larger values of F/D.
AB - The focusing properties of phase correcting Fresnel lenses with small values of focal length - to - diameter (FID) and with focal lengths of two wavelengths or less are investigated. For these lenses, the paraxial approximation for the Reyleigh resolution criterion is no longer valid. For Fresnel lenses designed with F/D < 0.2 and F ≤ λ, spatial resolutions of less than 0.5λ are possible, which is finer than what can typically be achieved for conventional (paraxial) designs. The spot beams in these cases are not quite axially symmetrical due to the presence of anti-symmetric field components, which vanish for larger values of F/D.
UR - http://www.scopus.com/inward/record.url?scp=51449089698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51449089698&partnerID=8YFLogxK
U2 - 10.1109/ICIMW.2006.368378
DO - 10.1109/ICIMW.2006.368378
M3 - Conference contribution
SN - 1424404002
SN - 9781424404001
SP - 170
BT - IRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics
ER -