Publications de Benjamin Dwir | EPFL Graph Search

Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

A compact platform to integrate emitters in a cavity-like support is to embed quantum dots (QDs) in a photonic crystal (PhC) structure, making them promising candidates for integrated quantum photonic circuits. The emission properties of QDs can be modifie ...

2025

Enhanced photon emission from site- and energy-controlled InGaAs/GaAs quantum dots coupled to GaAs nanowires

Benjamin Dwir

InGaAs/GaAs quantum dots (QDs) embedded in a GaAs substrate are very useful photon sources, including single and entangled photons, due to their unperturbed environment. Contrary to self-formed QDs, those grown in pyramidal pits can be well controlled in p ...

2025

Spatial Avoided Crossing in Optical Emission of Site-Controlled Pyramidal Quantum Dots in Photonic Crystal Cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

Interactions of site-controlled quantum dots with a high-order cavity mode of an L7-type photonic crystal cavity are resolved spatially and spectrally. We observed a spatial avoided crossing in polarization-resolved optical emission of quantum dots. ...

Institute of Electrical and Electronics Engineers Inc.2024

Site-controlled QD embedded coupled photonic crystal cavity waveguides for on-chip photon routing

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

We demonstrate the on-chip photon routing on a site-controlled quantum dots embedded W1 photonic crystal waveguides side coupled to a L3 cavity. Observed photon propagation through the device indicates the connectivity of all photonic elements. ...

Optical Society of America2023

Single site-controlled inverted pyramidal InGaAs QD-nanocavity operating at the onset of the strong coupling regime

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

Precise positioning of single site-controlled inverted pyramidal InGaAs quantum dots (QDs) at the antinode of a GaAs photonic crystal cavity with nanometer-scale accuracy holds unique advantages compared to self-assembled QDs and offers great promise for p ...

Aip Publishing2023

Exciton-polariton dynamics of the single site-controlled quantum dot-nanocavity in the coexisting strong-weak coupling regime

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

Deterministic positioning single site-controlled high symmetric InGaAs quantum dots (QDs) in (111)B-oriented GaAs photonic crystal cavities with nanometer-scale accuracy provides an idea component for building integrated quantum photonic circuits. However, ...

IOP Publishing Ltd2023

Mode Interference Effect in Optical Emission of Quantum Dots in Photonic Crystal Cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Clément William Tendaï Jarlov, Milan Calic, Alexey Lyasota, Alessio Massimiliano Davide Miranda

Radiation properties of a pointlike source of light, such as a molecule or a semiconductor quantum dot, can be tailored by modifying its photonic environment. This phenomenon lies at the core of cavity quantum electrodynamics (CQED). Quantum dots in photon ...

American Physical Society2022

Controllable Pure Dephasing Pathways in Single SiteControlled Pyramidal Quantum Dot - Nanocavity System

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

We demonstrate the controllable exciton-cavity mode interaction mediated by pure dephasing in a single site-controlled quantum dot-nanocavity system. With varying detuning, Purcell enhanced dynamics and phonon-assisted cavity feeding sequentially dominate ...

IEEE2021

Remote excitation between quantum emitters mediated by an optical Fano resonance

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Antoine Maxime Delgoffe, Alexey Lyasota, Alessio Massimiliano Davide Miranda

Remote coupling between quantum emitters is of great importance for constructing quantum networks. Conventionally, this can be achieved via photon exchange by incorporating the quantum emitters in a waveguide or a large cavity. However, such photonic struc ...

OPTICAL SOC AMER2021

Towards strong-coupling regime in singular site-controlled InGaAs quantum dots-nanocavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Alessio Massimiliano Davide Miranda

We demonstrate the cavity quantum electrodynamics towards strong- coupling regime mediated by cavity loss and exciton pure dephasing in singular site-controlled quantum dotnanocavity system, studied by micro-photoluminescence (mu-PL) and time- resolved PL ...

IEEE2021

Integrated Quantum Photonics using Site-Controlled Quantum Dots and Tailored-Potential Photonic Crystals

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Antoine Maxime Delgoffe, Alexey Lyasota, Alessio Massimiliano Davide Miranda, Yi Yu

We demonstrate several integrated photonics structures incorporating site-controlled quantum dots and photonic crystal cavities with tailored mode structures. Optimal designs for single photon extraction, routing and switching are presented and discussed. ...

IEEE2019

Tilted-potential photonic crystal cavities for integrated quantum photonics

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Antoine Maxime Delgoffe, Bruno Marie Dominique Rigal, Alexey Lyasota, Alessio Massimiliano Davide Miranda

We propose and investigate a new type of photonic crystal (PhC) cavity for integrated quantum photonics, which provides tailored optical modes with both confined and extended spatial components. The structures consist of elongated PhC cavities in which the ...

2019

Limiting the Spectral Diffusion of Nano-Scale Light Emitters using the Purcell effect in a Photonic-Confined Environment

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Clément William Tendaï Jarlov, Alexey Lyasota

Partial suppression of the spectral diffusion of quantum dot (QD) excitons tuned to resonance of a nano-photonic cavity is reported. The suppression is caused by the Purcell enhancement of the QD-exciton recombination rate, which alters the rate of chargin ...

Nature Research2019

Site-controlled quantum dots coupled to photonic crystal waveguides

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Jesper Mork, Clément William Tendaï Jarlov, Bruno Marie Dominique Rigal, Alexey Lyasota, Irina Kulkova, Jakob Rosenkrantz De Lasson

We demonstrate selective optical coupling of multiple, site controlled semiconductor quantum dots (QDs) to photonic crystal waveguide structures. The impact of the exact position and emission spectrum of the QDs on the coupling efficiency is elucidated. Th ...

2016

Self-formation of hexagonal nanotemplates for growth of pyramidal quantum dots by metalorganic vapor phase epitaxy on patterned substrates

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Romain Carron, Alessandro Surrente, Pascal Gallo

We demonstrate the self-formation of hexagonal nanotemplates on GaAs (111)B substrates patterned with arrays of inverted tetrahedral pyramids during metal-organic vapor phase epitaxy and its role in producing high-symmetry, site-controlled quantum dots (QD ...

Tsinghua Univ Press2016

Site-Controlled Quantum Dots Coupled to Photonic Crystal Cavities and Waveguides

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Clément William Tendaï Jarlov, Bruno Marie Dominique Rigal, Alexey Lyasota, Irina Kulkova

Ieee2016

Effect of Pure Dephasing and Phonon Scattering on the Coupling of Semiconductor Quantum Dots to Optical Cavities

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Milan Calic, Alexey Lyasota

Using site-controlled semiconductor quantum dots (QDs) free of multiexcitonic continuum states, integrated with photonic crystal membrane cavities, we clarify the effects of pure dephasing and phonon scattering on exciton-cavity coupling in the weak-coupli ...

Amer Physical Soc2016

Polarization mode control of long-wavelength VCSELs by intracavity patterning

Benjamin Dwir, Elyahou Kapon, Alexei Sirbu, Vladimir Iakovlev, Alexandru Mereuta, Andrei Caliman, Zlatko Mickovic, Christopher Michael Long

Polarization mode control is enhanced in wafer-fused verticalcavity surface-emitting lasers emitting at 1310 nm wavelength by etching two symmetrically arranged arcs above the gain structure within the laser cavity. The intracavity patterning introduces bi ...

Optical Soc Amer2016

Non-centrosymmetric plasmonic crystals for second-harmonic generation with controlled anisotropy and enhancement

Benjamin Dwir, Elyahou Kapon, Justyna Szeszko

Rectangular arrays of pyramidal recesses coated by silver film are investigated by means of polarization-resolved nonlinear microscopy at 900 nm fundamental wavelength, demonstrating strong dependence of the dipole-allowed SHG upon the lattice parameters. ...

Wiley-V C H Verlag Gmbh2016

Exciton dynamics in a site-controlled quantum dot coupled to a photonic crystal cavity

Benjamin Dwir, Elyahou Kapon, Alok Rudra, Pascal Gallo, Clément William Tendaï Jarlov, Alexey Lyasota

Exciton and cavity mode (CM) dynamics in site-controlled pyramidal quantum dots (QDs), integrated with linear photonic crystal membrane cavities, are investigated for a range of temperatures and photo-excitation power levels. The absence of spurious multi- ...

Amer Inst Physics2015