Group IV direct band gap photonics: methods, challenges, and opportunities

R Geiger, T Zabel, H Sigg - Frontiers in Materials, 2015 - frontiersin.org
The concept of direct band gap group IV materials may offer a paradigm change for Si-
photonics concerning the monolithic implementation of light emitters: the idea is to integrate …

Recent advances in germanium nanocrystals: Synthesis, optical properties and applications

D Carolan - Progress in materials science, 2017 - Elsevier
Abstract Germanium nanocrystals (Ge NCs) have recently attracted renewed scientific
interest as environmentally friendlier alternatives to classical II–VI and IV–VI QDs containing …

Direct bandgap germanium-on-silicon inferred from 5.7%〈 100〉 uniaxial tensile strain

DS Sukhdeo, D Nam, JH Kang, ML Brongersma… - Photonics …, 2014 - opg.optica.org
We report uniaxial tensile strains up to 5.7% along〈 100〉 in suspended germanium (Ge)
wires on a silicon substrate, measured using Raman spectroscopy. This strain is sufficient to …

Reduced lasing thresholds in GeSn microdisk cavities with defect management of the optically active region

A Elbaz, R Arefin, E Sakat, B Wang, E Herth… - ACS …, 2020 - ACS Publications
GeSn alloys are nowadays considered as the most promising materials to build Group IV
laser sources on silicon (Si) in a full complementary metal oxide semiconductor-compatible …

Direct bandgap light emission from strained germanium nanowires coupled with high-Q nanophotonic cavities

J Petykiewicz, D Nam, DS Sukhdeo, S Gupta… - Nano Letters, 2016 - ACS Publications
A silicon-compatible light source is the final missing piece for completing high-speed, low-
power on-chip optical interconnects. In this paper, we present a germanium nanowire light …

Strained-germanium nanostructures for infrared photonics

C Boztug, JR Sánchez-Pérez, F Cavallo, MG Lagally… - ACS …, 2014 - ACS Publications
The controlled application of strain in crystalline semiconductors can be used to modify their
basic physical properties to enhance performance in electronic and photonic device …

Tensile Ge microstructures for lasing fabricated by means of a silicon complementary metal-oxide-semiconductor process

G Capellini, C Reich, S Guha, Y Yamamoto… - Optics express, 2014 - opg.optica.org
In this work we study, using experiments and theoretical modeling, the mechanical and
optical properties of tensile strained Ge microstructures directly fabricated in a state-of-the …

Monolithically integrated Ge-on-Si active photonics

J Liu - Photonics, 2014 - mdpi.com
Monolithically integrated, active photonic devices on Si are key components in Si-based
large-scale electronic-photonic integration for future generations of high-performance, low …

[PDF][PDF] All‐Around SiN Stressor for High and Homogeneous Tensile Strain in Germanium Microdisk Cavities

A Ghrib, M El Kurdi, M Prost… - Advanced …, 2015 - qdgroup.universite-paris-saclay.fr
Strain engineering has emerged as a powerful tool to control the properties of electronic and
photonic structures. Strain has a direct impact on the mechanical properties and on the …

[HTML][HTML] Germanium microlasers on metallic pedestals

A Elbaz, M El Kurdi, A Aassime, S Sauvage… - APL photonics, 2018 - pubs.aip.org
Strain engineering is a powerful approach in micro-and optoelectronics to enhance carrier
mobility, tune the bandgap of heterostructures, or break lattice symmetry for nonlinear optics …