Søren Engelberth Hansen’s Post

I'm excited to share that our paper has recently been published! In this work, we present an on-chip, room-temperature single photon source that generates radially polarized photons at high rates. Our devices consists of a giant colloidal quantum dot coupled to a hybrid nanoantenna, which emit single photons at a significantly high degree of radial polarization, through selective Purcell enhancement of the out-of-plane dipole. Radially polarized light, a unique form of vector polarizations, opens new opportunities for both classical and quantum communication, therefore our device paves the way for exciting applications in these fields. https://lnkd.in/dqSZP5-S #nanophotonics #quantumoptics #optics #radialpolarization #quantumdot #quantumtechnology #plasmonics #nanoantenna

Excited to share our new research on Backward Wave Optical Parametric Oscillation (BWOPO) in a waveguide, published in Nature NPJ Nanophotonics. This marks the first-ever waveguide-based BWOPO, offering a 19x lower oscillation threshold making pumping with compact Q-switched or gain-switched microchip lasers a compelling option. These advances also promise huge potential for quantum optics—enabling the development of ultra-compact, high-efficiency narrowband photon sources ideal for quantum computing and communications. Read more here: https://lnkd.in/dw9VecDx #Photonics #QuantumOptics #Nanotechnology

'Programmable Integrated Photonics with Phase-Change Materials' is the title of the invited speaker presentation by Carlos A. Ríos Ocampo, Assistant Professor at University of Maryland. Phase-change materials (PCMs) have emerged as a promising platform to #modulate #light in a #nonvolatile manner—a reversible switching between their stable #amorphous and #crystalline states leads to an impressive #refractive index contrast. Read more about his presentation and about the conference program on https://lnkd.in/eHrrTnBg #ecio24 #integratedphotonics #pics #callforpapers #phasechange #materials

Single-stage Multipass cell compression from 90 fs to 16 fs.

Here’s what caught my eye in quantum compute lately: 1️⃣ Most optical circuitry? Top-notch. 2️⃣ Pulsed laser source? Impressive. But... 🤔 Still using single photon counting modules. Why would you do that when you’ve got photons all in the same quantum state? 🧐 And here’s something that really threw me: Attenuating a 80MHz laser… just to get single photons out? This feels like self-sabotage. Photonics pros – What’s your take? Why stick to single photons instead of multi-photon pulses? Let’s talk about the real tech behind these decisions. Feel free to repost if this resonated ♻️ #Photonics #QuantumTech #LaserEngineering #TechInsights #PhotonScience

photonics quantum dots

Read the new paper by Rana Tanos, Hajer TLILI, Yoann Curé, Matteo Finazzer, Alberto Artioli, Saptarshi Kotal, yann genuist, Pierre Verlot, Joël Bleuse, Jean-Michel Gérard, and Julien Claudon reporting high-order nanowire resonances for high-rrequency, large-coupling-strength quantum dot hybrid nanomechanics . https://lnkd.in/e3wNfyrF Hybrid nanomechanical systems embedding a quantum light emitter, such as a semiconductor quantum dot (QD), are investigated both for their potential application in quantum information technologies. This paper explores the complex vibration modes of a GaAs nanowire with embedded InAs QDs. Electrodes on the chip create a 3D force field to stimulate various vibration modes, which are then optically detected through the QDs' microphotoluminescence spectrum, revealing the vibration mode's characteristics. Starting from the fundamental flexural mode below 1 MHz, we find higher-order resonances significantly increase the mechanical frequency and the system's hybrid coupling strength. This work is a colaboration between PHELIQS - Quantum Photonics, Electronics and Engineering, Institut Néel CNRS and CentraleSupélec. #semiconductors #optoelectronics #photonics #nanotechnology #nanomechanics #quantumdots NPSC - Nanophysics and Semiconductors CEA-Irig, Université Grenoble Alpes, Grenoble INP - UGA

Issue 1/2024 – February / March ’24 of #PhotonicsViews is out. Focus section: photonics for quantum technology https://lnkd.in/esubVGf8 #quantumtechnology

Don't miss the next instalment of our webinar series this week on Silicon Nitride. In this webinar, Thalia Dominguez will introduce silicon nitride photonics and discuss the rationale behind the use of this material for photonic integrated circuits, its advantages, and disadvantages. Thalia will then provide a brief overview of the basic building blocks that can be developed with layers of different compositions, target wavelengths, and a pathway for the integration of active elements. Finally, Thalia will discuss application examples in telecommunications, sensing, and quantum technologies. Don't miss it! Register here: https://lnkd.in/exWFje2X

Tunable quantum dot microcavities could unlock scalable quantum photonics. A novel tunable microcavity deterministically coupled to single quantum dots achieves highly efficient, pure and indistinguishable single photon generation, overcoming key roadblocks to scalable quantum technologies - https://lnkd.in/g3kZGf8z #photonics