Berlin 2024 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 49: Semiconductor Lasers II

HL 49.5: Vortrag

Donnerstag, 21. März 2024, 16:15–16:30, EW 561

Numerical investigation of the far-field behavior of VCSELs with monolithic high contrast gratings — •Lilli Kuen1,2, Mikołaj Janczak3, Marcin Gebski3, Tomasz Czyszanowski3, Sven Burger1,2, Stephan Reitzenstein4, and Martin Hammerschmidt1,21Zuse Institute Berlin, Takustraße 7, 14195 Berlin, Germany. — 2JCMwave GmbH, Bolivarallee 22, 14050 Berlin, Germany. — 3Institute of Physics, Lodz University of Technology, 93-005 Łódź, Poland. — 4Institute of Solid State Physics, Technische Universität Berlin, 10623 Berlin, Germany.

Vertical-cavity surface-emitting lasers (VCSELs) are widely used light sources, and their functional principle is well known. A novel approach to control the resonant wavelength and the polarisation state is to replace the upper DBR mirror with a line grating with finite size and high contrast material, a so-called monolithic high contrast grating (MHCG).

In this contribution, we investigate the far-field behavior of such structures with respect to the oxide aperture width, the size of the grating, and the number of grating periods. This enables a better understanding of the relation between oxide aperture width and the finite grating size on the most important properties of VCSELs with MHCG.

In our numerical study, we compute resonance modes, which are solutions to Maxwell's equations without sources. To this aim, we employ a finite-element method. The far-field pattern is obtained by using a near-field to far-field transformation.

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