Improved dielectric mirrors for the THz frequency range

F. Rutz; N. Krumbholz; L. Micele; G. de Portu; D. M. Mittleman; M. Koch

doi:10.1117/12.661610

19 April 2006 Improved dielectric mirrors for the THz frequency range

F. Rutz, N. Krumbholz, L. Micele, G. de Portu, D. M. Mittleman, M. Koch

Proceedings Volume 6194, Millimeter-Wave and Terahertz Photonics; 61940K (2006) https://doi.org/10.1117/12.661610
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

Dielectric mirrors are widely used in optical setups for spectral regions such as UV, visible, as well as IR. Yet, for the rapidly growing field of terahertz spectroscopy dielectric multilayer optics are sparsely utilized. But with low-loss materials high quality THz optics can be obtained. We present two approaches for the realization of highly effective dielectric THz mirrors. First, four thin slices of high-resistivity silicon and five common polypropylene (PP) foils were alternately stacked together to obtain a broad reflection band. This stop-band blueshifts with increasing angles of incidence. But due to the high index step between Si and PP a band from 0.32 to 0.375 THz always remains the stopband for all incidence angles and both the s- and p-polarization. The measurement data obtained in reflection and transmission geometry are reproduced well by numerical simulations. With a minor change of the layer sequence a microresonator is obtained which reveals a sharp transmission peak at around 0.3 THz within the reflection band. The second material system consists of ceramic laminates of alumina (A) and alumina-zirconia (AZ). Measurements on 12.5 pairs of A/AZ layers yield a strong stop-band from 0.3 to 0.37 THz at normal incidence, which again match numerical simulations. The big advantage of the ceramic mirror is the rugged, quasimonolithic design of the sintered multilayer structure.

Citation Download Citation

F. Rutz, N. Krumbholz, L. Micele, G. de Portu, D. M. Mittleman, and M. Koch "Improved dielectric mirrors for the THz frequency range", Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 61940K (19 April 2006); https://doi.org/10.1117/12.661610

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available