Abstract

Multilevel phase Fresnel lenses (MPFLs) with a high numerical aperture for 0.58 THz frequencies were developed. The components based on a monocrystalline silicon wafer are prepared by patterning by a high-speed industrial-scale laser direct writing (LDW) system. Two consistent series of the terahertz-MPFLs with phase quantization levels varying between 2 and the continuous kinoform shape for the focal lengths of 5 and 10 mm were produced employing inherent flexibility of the LDW fabrication process. The focusing performance was studied at the optimal 0.58 THz frequency using a Gaussian beam profile and scanning 2D intensity distribution with a terahertz detector along the optical axis. The efficiency of the terahertz-MPFL was found to be dependent of the number of subzones. The position and orientation angles of the patterned plane of the silicon wafer were considered to reduce the effect of standing waves formation in the experiment.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Laser-processed diffractive lenses for the frequency range of 4.7  THz

Simonas Indrišiūnas, Heiko Richter, Ignas Grigelionis, Vytautas Janonis, Linas Minkevičius, Gintaras Valušis, Gediminas Račiukaitis, Till Hagelschuer, Heinz-Wilhelm Hübers, and Irmantas Kašalynas
Opt. Lett. 44(5) 1210-1213 (2019)

A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging

Chong Li, James Grant, Jue Wang, and David R. S. Cumming
Opt. Express 21(21) 24452-24459 (2013)

Fabrication of binary Fresnel lenses in PMMA by femtosecond laser surface ablation

Rebeca Martínez Vázquez, Shane M. Eaton, Roberta Ramponi, Giulio Cerullo, and Roberto Osellame
Opt. Express 19(12) 11597-11604 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription