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20 November 2021, Volume 60, Issue 33, pp. 10292-10476  
24 articles

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Ultrasound liquid crystal lens with a variable focus in the radial direction for image stabilization

Jessica Onaka, Takahiro Iwase, Akira Emoto, Daisuke Koyama, and Mami Matsukawa

Appl. Opt. 60(33), 10365-10371 (2021)  View: HTML | PDF  [Suppl. Mat. (1)]

Grass-like alumina coated window harnesses the full omnidirectional potential of black silicon photodiodes

Christoffer Kauppinen, Toni P. Pasanen, Kirill Isakov, Michael Serué, Juha Heinonen, Ville Vähänissi, Harri Lipsanen, and Hele Savin

Appl. Opt. 60(33), 10415-10420 (2021)  View: HTML | PDF

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Linear scanning system for THz imaging

A. V. Shchepetilnikov, P. A. Gusikhin, V. M. Muravev, B. D. Kaysin, G. E. Tsydynzhapov, A. A. Dremin, and I. V. Kukushkin

Appl. Opt. 60(33), 10448-10452 (2021)  View: HTML | PDF

Fabrication of three-layer silicon antireflection structures in 200–450 GHz using deep reactive ion etching

Takashi Hasebe, Tasuku Hayashi, Yoshinori Shohmitsu, Tom Nitta, Hiroshi Matsuo, and Yutato Sekimoto

open access Appl. Opt. 60(33), 10462-10467 (2021)  View: HTML | PDF

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Fresnel reflection from the window glass of conventional photodiode packaging can reduce performance dramatically; however, grass-like alumina coatings are efficient and omnidirectional AR coatings in a wide wavelength range. For details, see Kauppinen et al., pp. 10415–10420.

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