14 citations · 16 across the 19 of their papers we have counts for
21 papers
Resolving High-Energy States of Interlayer Excitons in MoSe/WSe Heterostructures
Chirag Chandrakant Palekar, Paulo E. Faria Junior, Tobias Manthei +8
High-energy states of interlayer excitons (IXs) in van der Waals heterostructures remain largely unexplored despite their importance for understanding many-body interactions and no…
An integrated all-van der Waals nanobeam laser
Aris Koulas-Simos, Pietro Metuh, Athanasios Paralikis +7
Transition-metal dichalcogenides offer a promising platform for integrated coherent light sources, yet lasing has largely relied on hybrid photonic architectures without direct qua…
Anisotropic nanoscale coherent polariton transport in CrSBr
Paritosh Malik, Dogyun Ko, Vita Solovyeva +11
In a combined experimental and theoretical study, we demonstrate anisotropic polariton transport on the nanoscale in the van der Waals antiferromagnet CrSBr. While effective cavity…
Energy-time entanglement from a monolithically integrated quantum dot on silicon
Marcel Hohn, Imad Limame, Peter Ludewig +4
Scalable quantum photonic technologies require deterministic sources of entangled photons that are compatible with established semiconductor manufacturing platforms. While self-ass…
Monolithic axial InGaAs quantum dot emitters in GaAs-based nanowires via Sb-mediated facet engineering
Hyowon W. Jeong, Aris Koulas-Simos, Imad Limame +6
GaAs-based nanowires hosting active quantum heterostructures provide a promising route toward monolithic integration of single-photon sources on silicon, a key requirement for scal…
Localized Excitonic Emission in Wafer-Scale MOCVD-Grown GaSe 2D Nanosheets for Classical and Non-Classical Light Sources
Bhabani Sankar Sahoo, Nils Fritjof Langlotz, Shachi Machchhar +11
Wafer-scale growth of two-dimensional semiconductors remains a key challenge for their integration into photonic technologies. While most studies of two-dimensional semiconductors…
Stark-tunable O-band single-photon sources based on deterministically fabricated quantum dot--circular Bragg gratings on silicon
Sarthak Tripathi, Kartik Gaur, Priyabrata Mudi +5
Semiconductor quantum dots (QDs) offer outstanding quantum-optical properties, making them highly attractive for quantum information technologies. However, combining wide-range ele…
Strain-Engineered Deterministic Quantum Dots for Telecom O-Band Emission Using Buried Stressors
Imad Limame, Ching-Wen Shih, Kartik Gaur +7
The deterministic realization of quantum light sources operating at telecom wavelengths is essential for long-distance fiber-based quantum communication and distributed quantum com…
Scalable Quantum Photonic Platform Based on Site-Controlled Quantum Dots Coupled to Circular Bragg Grating Resonators
Kartik Gaur, Avijit Barua, Sarthak Tripathi +12
The scalable integration of solid-state quantum emitters into photonic nanostructures remains a central challenge for quantum photonic technologies. Here, we demonstrate a robust a…
Direct Epitaxial Growth and Deterministic Device Integration of high-quality Telecom O-Band InGaAs Quantum Dots on Silicon Substrate
Imad Limame, Peter Ludewig, Aris Koulas-Simos +9
Semiconductor quantum dots (QDs) are key building blocks for photonic quantum technologies, enabling practical sources of non-classical light. A central challenge for scalable inte…
Bright electrically contacted circular Bragg grating resonators with deterministically integrated quantum dots
Setthanat Wijitpatima, Normen Auler, Priyabata Mudi +7
Cavity-enhanced emission of electrically controlled semiconductor quantum dots is essential in developing bright quantum devices for real-world quantum photonic applications. Combi…
Enhancement of interlayer exciton emission in a TMDC heterostructure via a multi-resonant chirped microresonator up to room temperature
Chirag C. Palekar, Barbara Rosa, Niels Heermeier +5
We report on multi-resonance chirped distributed Bragg reflector (DBR) microcavities. These systems are employed to investigate the light-mater interaction with both intra- and int…
Self-aligned photonic defect microcavities with site-controlled quantum dots
C. -W. Shih, I. Limame, C. C. Palekar +4
Despite the superiority in quantum properties, self-assembled semiconductor quantum dots face challenges in terms of scalable device integration because of their random growth posi…
High-quality single InGaAs/GaAs quantum dot growth on a CMOS-compatible silicon substrate for quantum photonic applications
Imad Limame, Peter Ludewig, Ching-Wen Shih +4
We present the direct heteroepitaxial growth of high-quality InGaAs quantum dots on silicon, enabling scalable, cost-effective quantum photonics devices compatible with CMOS techno…
Epitaxial growth and characterization of multi-layer site-controlled InGaAs quantum dots based on the buried stressor method
Imad Limame, Ching-Wen Shih, Alexej Koltchanov +8
We report on the epitaxial growth, theoretical modeling, and structural as well as optical investigation of multi-layer, site-controlled quantum dots fabricated using the buried st…
Twist Angle Dependence of Exciton Resonances in WSe/MoSe Moiré Heterostructures
Chirag Chandrakant Palekar, Joakim Hagel, Barbara Rosa +7
Van der Waals heterostructures based on TMDC semiconducting materials have emerged as promising materials due to their spin-valley properties efficiently contrived by the stacking-…
High- lasing in photonic-defect semiconductor-dielectric hybrid microresonators with embedded InGaAs quantum dots
Kartik Gaur, Ching-Wen Shih, Imad Limame +6
We report an easy-to-fabricate microcavity design to produce optically pumped high- quantum dot microlasers. Our cavity concept is based on a buried photonic-defect for tight la…
Temperature dependent temporal coherence of metallic-nanoparticle-induced single-photon emitters in a WSe monolayer
Martin von Helversen, Lara Greten, Imad Limame +7
In recent years, much research has been undertaken to investigate the suitability of two-dimensional materials to act as single-photon sources with high optical and quantum optical…
Optical characteristics of cavity structures with Al0.2Ga0.8As/Al0.9Ga0.1As distributed Bragg reflectors and In0.37Ga0.63As quantum dots as the active region
Bartosz Kamiński, Agata Zielińska, Anna Musiał +5
We characterized optically In0.37Ga0.63As/GaAs quantum dots and Al0.2Ga0.8As/Al0.9Ga0.1As distributed Bragg reflector based cavities. The main mechanisms of quantum dots photolumin…
Low-threshold lasing of optically pumped micropillar lasers with AlGaAs/AlGaAs distributed Bragg reflectors
Ching-Wen Shih, Imad Limame, Sebastian Krüger +4
We report on the design, realization and characterization of optically pumped micropillar lasers with low-absorbing AlGaAs/AlGaAs dielectric Bragg r…
Low-threshold operation of GaAs-based (GaIn)As/Ga(AsSb)/(GaIn)As W-quantum well lasers emitting in the O-band
Christian Fuchs, Imad Limame, Stefan Reinhard +6
The influence of the growth conditions as well as the device design on the device performance of (GaIn)As/Ga(AsSb)/(GaIn)As "W"-quantum well lasers is investigated. To this purpose…