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Machinable ceramic for high performance and compact THz optical components.

Klein, Andreas K. and Hammler, Jonathan and Balocco, Claudio and Gallant, Andrew J. (2018) 'Machinable ceramic for high performance and compact THz optical components.', Optical materials express., 8 (7). pp. 1968-1975.


The properties of Shapal Hi-M Soft, an aluminum nitride based ceramic, as a material for THz optical components are investigated and compared with other ceramic materials. Shapal is a low-cost and machinable ceramic with a high-refractive index and low losses at THz frequencies: n = 2.65, α = 0.4 cm−1. To demonstrate the shaping capabilities, a Fresnel lens is fabricated with a micro-milling system. Additionally, a prism as an example of a bulk component is demonstrated. Both a THz time domain spectrometer and a vector network analyzer (0.75–1.1 THz) are used for the optical characterization and the absorption coefficient is precisely obtained in the VNA frequency range.

Item Type:Article
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Publisher statement:Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Date accepted:18 June 2018
Date deposited:29 June 2018
Date of first online publication:26 June 2018
Date first made open access:No date available

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