Work

On the Impact of Mechanical Constraint on Band Structure and Photo‐Elastic Effect in Photonic Resonators

Year: 2026

Type: article

Abstract: ABSTRACT Germanium–tin (GeSn) microdisks have emerged as promising structures for CMOS‐compatible light sources. Their emission properties depend on the composition of the GeSn alloy, strain, and temperature. In particular, optical and electronic properties are sensitive to the distribution of mechanical strain introduced during the growth process and patterning steps. Understanding how mechanical constraints and structural configurations influence the optical mode confinement and band structure is crucial for optimizing GeSn‐based laser devices. In this work, we present a comprehensive computational investigation into the mechanical deformation and optical behavior of GeSn microdisks fabricated on silicon substrates combining photoelasticity, analysis of optical modes and band structure calculations.

Source: Advanced Physics Research

DOI: 10.1002/apxr.70180

Authors: Jon Schlipf, Ignatii Zaitsev, Inga Anita Fischer, Davide Spirito, Bernd Witzigmann, Costanza Lucia Manganelli

Institutions: Leibniz Institute for High Performance Microelectronics, Brandenburg University of Technology Cottbus-Senftenberg, Basque Center for Materials, Applications and Nanostructures, Friedrich-Alexander-Universität Erlangen-Nürnberg

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: Bundesministerium für Forschung und Technologie, Agencia Estatal de Investigación, European Social Fund