301 citations · 998 across the 30 of their papers we have counts for
30 papers
Geometric Control of Visible Emitter Creation in Hexagonal Boron Nitride by Oblique Ion Irradiation
Sagar Chowdhury, Bhaveshkumar Kamaliya, Ramachandra Bangari +5
Ion irradiation creates optically active defects in wide-bandgap van der Waals materials, yet most approaches tune defect formation by varying the ion species, energy, or fluence w…
Quantum Coherence of Rare-Earth Ions in Heterogeneous Photonic Interfaces
Henry C. Hammer, Hassan A. Bukhari, Yogendra Limbu +6
Harnessing rare-earth ions in oxides for quantum networks requires integration with bright emitters in III-V semiconductors, but local disorder and interfacial noise limit their op…
Controlled growth of rare-earth-doped TiO thin films on III-V semiconductors for hybrid quantum photonic interfaces
Henry C. Hammer, Caleb Whittier, Nathan A. Helvy +3
Quantum photonic networks require two distinct functionalities: bright single-photon sources and long-lived quantum memories. III-V semiconductor quantum dots excel as deterministi…
Hardware requirements for realizing a quantum advantage with deterministic single-photon sources
Patrik I. Sund, Ravitej Uppu, Stefano Paesani +1
Boson sampling is a specialised algorithm native to the quantum photonic platform developed for near-term demonstrations of quantum advantage over classical computers. While clear…
Observation of light propagation through a three-dimensional cavity superlattice in a 3D photonic band gap
Manashee Adhikary, Marek Kozon, Ravitej Uppu +1
We experimentally investigate unusual light propagation inside a three-dimensional (3D) superlattice of resonant cavities that are confined within a 3D photonic band gap. Therefore…
Entanglement properties of a quantum-dot biexciton cascade in a chiral nanophotonic waveguide
Eva M. González-Ruiz, Freja T. Østfeldt, Ravitej Uppu +2
We analyse the entanglement properties of deterministic path-entangled photonic states generated by coupling the emission of a quantum-dot biexciton cascade to a chiral nanophotoni…
Clones of the Unclonable: Nanoduplicating Optical PUFs and Applications
E. Marakis, U. Rührmair, M. Lachner +3
Physical unclonable functions (PUFs), physical objects that are practically unclonable because of their andom and uncontrollable manufacturing variations, are becoming increasingly…
Independent operation of two waveguide-integrated quantum emitters
Camille Papon, Ying Wang, Ravitej Uppu +5
We demonstrate the resonant excitation of two quantum dots in a photonic integrated circuit for on-chip single-photon generation in multiple spatial modes. The two quantum dots are…
A Pure and indistinguishable single-photon source at telecommunication wavelength
Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou +8
On-demand single-photon sources emitting pure and indistinguishable photons at the telecommunication wavelength are a critical asset towards the deployment of fiber-based quantum n…
On-demand source of dual-rail photon pairs based on chiral interaction in a nanophotonic waveguide
Freja T. Østfeldt, Eva M. González-Ruiz, Nils Hauff +8
Entanglement is the fuel of advanced quantum technology. It is for instance consumed in measurement-based quantum computing and allows loss-tolerant encoding of quantum information…
Single-photon quantum hardware: towards scalable photonic quantum technology with a quantum advantage
Ravitej Uppu, Leonardo Midolo, Xiaoyan Zhou +2
The scaling up of quantum hardware is the fundamental challenge ahead in order to realize the disruptive potential of quantum technology in information science. Among the plethora…
Electroabsorption in gated GaAs nanophotonic waveguides
Ying Wang, Ravitej Uppu, Xiaoyan Zhou +6
We report on the analysis of electroabsorption in thin GaAs/AlGaAs nanophotonic waveguides with an embedded -- junction. By measuring the transmission thro…
Wafer-Scale Epitaxial Modulation of Quantum Dot Density
N. Bart, C. Dangel, P. Zajac +21
Precise control of the properties of semiconductor quantum dots (QDs) is vital for creating novel devices for quantum photonics and advanced opto-electronics. Suitable low QD-densi…
Spatially shaping waves to penetrate deep inside a forbidden gap
Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld +1
It is well known that waves incident upon a crystal are transported only over a limited distance - the Bragg length - before being reflected by Bragg interference. Here, we demonst…
Near Transform-limited Quantum Dot Linewidths in a Broadband Photonic Crystal Waveguide
Freja T. Pedersen, Ying Wang, Cecilie T. Olesen +8
Planar nanophotonic structures enable broadband, near-unity coupling of emission from quantum dots embedded within, thereby realizing ideal singe-photon sources. The efficiency and…
Scalable integrated single-photon source
Ravitej Uppu, Freja T. Pedersen, Ying Wang +8
Photonic qubits are key enablers for quantum-information processing deployable across a distributed quantum network. An on-demand and truly scalable source of indistinguishable sin…
Deterministic and controllable photonic scattering media via direct laser writing
E. Marakis, R. Uppu, M. L. Meretska +3
Photonic scattering materials, such as biological tissue and white paper, are made of randomly positioned nanoscale inhomogeneities in refractive index that lead to multiple scatte…
On-chip deterministic operation of quantum dots in dual-mode waveguides for a plug-and-play single-photon source
Ravitej Uppu, Hans T. Eriksen, Henri Thyrrestrup +9
A deterministic source of coherent single photons is an enabling device of quantum-information processing for quantum simulators, and ultimately a full-fledged quantum internet. Qu…
On-chip nanomechanical filtering of quantum-dot single-photon sources
Xiaoyan Zhou, Ravitej Uppu, Zhe Liu +6
Semiconductor quantum dots in photonic integrated circuits enable scaling quantum-information processing to many single photons and quantum-optical gates. On-chip spectral filters…
Experimental probe of a complete 3D photonic band gap
Manashee Adhikary, Ravitej Uppu, Cornelis A. M. Harteveld +2
The identification of a complete three-dimensional (3D) photonic band gap in real crystals always employs theoretical or numerical models that invoke idealized crystal structures.…
Suspended Spot-Size Converters for Scalable Single-Photon Devices
Aslı D. Uğurlu, Henri Thyrrestrup, Ravitej Uppu +6
We report on the realization of a highly efficient optical spot-size converter for the end-face coupling of single photons from GaAs-based nanophotonic waveguides with embedded qua…
Universal Validity Ranges of Diffusion Theory for Light and Other Electromagnetic Waves
Maryna L. Meretska, Ravitej Uppu, Ad Lagendijk +1
The well-known diffusion theory describes propagation of light and electromagnetic waves in complex media. While diffusion theory is known to fail both for predominant forward scat…
Efficient demultiplexed single-photon source with a quantum dot coupled to a nanophotonic waveguide
Thomas Hummel, Claudéric Ouellet-Plamondon, Ela Ugur +5
Planar nanostructures allow near-ideal extraction of emission from a quantum emitter embedded within, thereby realizing deterministic single-photon sources. Such a source can be tr…
Uniform line fillings
Evangelos Marakis, Matthias C. Velsink, Lars J. Corbijn van Willenswaard +2
Deterministic fabrication of random metamaterials requires filling of a space with randomly oriented and randomly positioned chords with an on-average homogenous density and orient…