| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Karioja, Pentti
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2022Development of gradient index microlenses for the broadband infrared rangecitations
- 2014Detection of low concentration formaldehyde gas by photonic crystal sensor fabricated by nanoimprint process in polymer materialcitations
- 2014Detection of low concentration formaldehyde gas by photonic crystal sensor fabricated by nanoimprint process in polymer materialcitations
- 2012Printed hybrid systemscitations
- 2011UV-imprinting of single-mode polymeric waveguidescitations
- 2011Manipulation of optical field distribution in layered composite polymeric-inorganic waveguidescitations
- 2011Field enhancement in polymer waveguides fabricated by UV imprintingcitations
- 2010Fabrication of optical inverted-rib waveguides using UV-imprintingcitations
- 2009Hermetic fiber pigtailed laser module utilizing passive device alignment on an LTCC substratecitations
- 2009Finland-Japan Workshop on Nanophotonics and Related Technologies
- 2008Electro-optical properties of BaTiO3-SrTiO3 multilayer thin films for waveguide modulatorscitations
- 2008Electro-optical properties of BaTiO 3 -SrTiO 3 multilayer thin films for waveguide modulatorscitations
- 2007Inmould integration of a microscope add-on system to a 1.3 Mpix camera phonecitations
- 2006Fiber pigtailed multimode laser module based on passive device alignment on an LTCC substratecitations
- 2006Integrated LTCC modules by laminating and co-firing tapes directly on heat sinkcitations
- 2006Cost-efficient hermetic fibre pigtailed laser module utilizing passive device alignment on an LTCC substrate
- 2004Photo-crosslinkable hybrid material with improved aging stability for integrated optics
Places of action
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article
Development of gradient index microlenses for the broadband infrared range
Abstract
The development of gradient index free-form micro-optic components dedicated to the mid-infrared range is challenging due to the lack of appropriate technology. We propose a method for developing gradient index components for broadband infrared range beyond the transmission window of silicate glass based on nanostructurization using a stack-and-draw fiber drawing technique. A proof-of-concept microlens is developed and verified experimentally in the wavelength range 1.5–4.3 µm. The microlenses are composed of a set of nanorods with a diameter of 940 nm made of a pair of SiO 2 -PbO-Bi 2 O 3 -Ga 2 O 3 based glasses ordered into the preliminary calculated binary pattern. The pattern forms effectively continuous parabolic refractive index distribution for infrared range according to Maxwell-Garnett effective medium model. The development of individual microlenses with a diameter of 118 µm and focal length of 278 µm at the wavelength of 3.75 µm are reported. A large array of 737 microlenses with an individual diameter of 125 µm and focal length of 375 µm is also presented and analyzed.