Temat: microlens - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling of vertical-cavity surface-emitting laser beam collimation using a nanostructured gradient index microlens
Autorzy:: Nowosielski, J M
Waddie, A. J.
Taghizadeh, M. R.
Buczynski, R.
Powiązania:: https://bibliotekanauki.pl/articles/174429.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: gradient index optics
microlens
soft glass
Opis:: In this paper we show that the recently developed nanostructured gradient index (nGRIN) rod microlens can be utilised for the collimation of the beam generated by a vertical-cavity surface-emitting laser (VCSEL). The modelling of the nanostructured lens structure is performed using the finite difference time domain (FDTD) method with realistic nGRIN parameters and a Gaussian model of the light source. The large refractive index gradient of the nanostructured microlens allows the final microlens thickness to be only 70 μm with a diameter of 10 μm. Successful collimation of a single-mode VCSEL beam with a waist half-width of 1.53 μm is presented with a reduction in divergence half-angle from 10.1° to 3.3°. We show that the linear polarisation of the incident beam is preserved as well as presenting the tolerance of this type of lens to variations in overall thickness.
Źródło:: Optica Applicata; 2013, 43, 4; 761-772
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Efficient, low-cost optical coupling mechanism for TiO2-SiO2 sol-gel derived slab waveguide surface grating coupler sensors
Autorzy:: Kaźmierczak, Andrzej
Słowikowski, Mateusz
Pavłov, Krystian
Filipiak, Maciej
Vervaeke, Michael
Tyszkiewicz, Cuma
Ottevaere, Heidi
Piramidowicz, Ryszard
Karasiński, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/1835968.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: polymer microlens
optical coupling
surface grating coupler
Opis:: We present an optical signal coupling scheme for slab waveguide surface grating coupler sensors. The proposed solution is based on the use of polymer microlenses. In this work we analyze two types of compact polymer lenses: the aspheric plano-convex lenses and Fresnel lenses. The feasibility of the proposed scheme is demonstrated by the experimental investigation into the optical signal coupling to the test structure of TiO2-SiO2 slab waveguide surface grating coupler using both types of lenses.
Źródło:: Optica Applicata; 2020, 50, 4; 539-549
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Enhancing light harvesting of organic solar cells by using hybrid microlenses
Autorzy:: Xiao, X
Zhang, Z
Xie, S
Liu, Y
Hu, D
Du, J
Powiązania:: https://bibliotekanauki.pl/articles/174313.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: organic solar cells
hybrid microlens
light harvesting
achromatization
Opis:: Organic solar cells have drawn intense attentions in recent years due to their inherent advantages. But the relatively low power conversion efficiency is the main obstacle in the way of organic solar cell commercialization. One of the main reasons that limit the power conversion efficiency is the mismatch between electrical transmission properties and light absorption properties in an organic active layer. In this work, a highly efficient light trapping scheme with a hybrid microlens array is proposed to resolve this contradiction. This structure can achieve broadband absorption enhancement in the spectrum of interest by chromatic aberration correction and hole parameter adjustment. And the light trapping element can be separated from cells to avoid direct contact with an organic layer that may cause electrical defects. Moreover, it is also compatible with low cost manufacturing technologies.
Źródło:: Optica Applicata; 2015, 45, 1; 89-100
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

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