Extending the Alvarez-lens concept to arbitrary optical devices: tunable gratings, lenses, and spiral phase plates

Stefan F. Busch, Jan C. Balzer*, George Bastian, Graham E. Town, Martin Koch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The Alvarez lenses consist of two parts with surface geometry designed to produce a change in refractive power with transversal translation between the upper and lower parts of the device. In this study, we present a new and straightforward approach to calculating the geometry of such devices and show that an Alvarez configuration can be found not only for lenses, but also for virtually any refractive device. Surface profiles required to realize an optical wedge, a blazed grating, a lens, and a spiral phase plate are presented. The performance of the devices is verified by numerical simulations and experimentally.

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalIEEE Transactions on Terahertz Science and Technology
Volume7
Issue number3
DOIs
Publication statusPublished - May 2017

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