Inverse designed photonic crystals for spatial filtering

Author:

Babayigit Ceren1ORCID,Grineviciute Lina23ORCID,Nikitina Julianija23ORCID,Melnikas Simas3ORCID,Gailevicius Darius2ORCID,Staliunas Kestutis245ORCID

Affiliation:

1. University of California 1 , Irvine, California 92697, USA

2. Laser Research Center, Faculty of Physics, Vilnius University 2 , Sauletekio Ave. 10, Vilnius, Lithuania

3. Center for Physical Sciences and Technology 3 , Savanoriu Ave. 231, Vilnius LT-02300, Lithuania

4. ICREA 4 , Passeig Lluís Companys 23, Barcelona 08010, Spain

5. UPC, Dep. de Fisica 5 , Rambla Sant Nebridi 22, Terrassa (Barcelona) 08222, Spain

Abstract

Zero incidence angle spatial filters of a compact design can be very useful, among others, for intracavity spatial filtering in high-power micro-lasers. Typically, micro-lasers, especially in high-power operation regimes, emit beams of low spatial quality due to the large aspect ratio of the laser resonator. A promising proposal for compact spatial filtering is the integration of the Photonic Crystals structures into the micro-resonator of the laser. Here, we report efficient spatial filters with desired filtering properties engineered by the inverse design. Such filters can be designed not only separately for both polarizations of the incident radiation but also simultaneously for both S and P polarizations. Moreover, we fabricate the inverse-designed structure by physical vapor deposition and highlight good correspondence of the angle-wavelength transmission map to the target one.

Funder

European Social Fund

the Spanish Ministerio de Ciencia e Innovaci_on under

the European Social Fund

the Horizon 2020 ERA.NET-COFUND Program Project MiLaCo

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

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