Dr. Sofia Pazzagli

Profil

Zusammenfassung

Dr. Sofia Pazzagli entwickelt Materialplattformen und Integrationsmethoden für Quantenoptik und Nanophotonik. Sie arbeitet an der Kopplung von Quantenstrahlern (einzelnen Photonen-Quellen) mit photonischen Strukturen – etwa organischen Nanokristallen in Polymeren oder AlGaN-Heterostrukturen – um robuste, skalierbare Bauelemente für Quantentechnologien zu schaffen. Ihre Expertise liegt in der Herstellung und Charakterisierung von Hybrid-Systemen, die Kohärenz und Photostabilität bewahren.

Skills

Name

Dr. Sofia Pazzagli

Titel

Dr.

Fakultät

Mathematisch-Naturwissenschaftliche Fakultät

Institut

Institut für Physik

Arbeitsgruppe

Grundlagen der Optik und Photonik

E-Mail

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HU-FIS-Profil

Quelle ↗

Zuletzt gescrapt

28.6.2026, 01:10:51

• GREENing the future of quantum optics and integrated nanoPHOtoNics (QO-IN), one lab at the time

  Quelle ↗

  Förderer: Volkswagen Stiftung Zeitraum: 09/2024 - 08/2026 Projektleitung: Prof. Dr. Arno Rauschenbeutel, Dr. Sofia Pazzagli

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• Self-Assembled Nanocrystals of Polycyclic Aromatic Hydrocarbons Show Photostable Single-Photon Emission

  2018

  ACS Nano · 82 Zitationen · DOI

  Quantum technologies could largely benefit from the control of quantum emitters in sub-micrometric size crystals. These are naturally prone to integration in hybrid devices, including heterostructures and complex photonic devices. Currently available quantum emitters in nanocrystals suffer from spectral instability, preventing their use as single-photon sources for most quantum optics operations. In this work we report on the performances of single-photon emission from organic nanocrystals (average size of hundreds of nm), made of anthracene (Ac) and doped with dibenzoterrylene (DBT) molecules. The source has hours-long photostability with respect to frequency and intensity, both at room and at cryogenic temperature. When cooled to 3 K, the 00-zero phonon line shows linewidth values (50 MHz) close to the lifetime limit. Such optical properties in a nanocrystalline environment recommend the proposed organic nanocrystals as single-photon sources for integrated photonic quantum technologies.

• Electrical Control of Lifetime-Limited Quantum Emitters Using 2D Materials

  2019

  Nano Letters · 52 Zitationen · DOI

  Solid-state quantum emitters are a mainstay of quantum nanophotonics as integrated single-photon sources (SPS) and optical nanoprobes. Integrating such emitters with active nanophotonic elements is desirable in order to attain efficient control of their optical properties, but it typically degrades the photostability of the emitter itself. Here, we demonstrate a tunable hybrid device that integrates state of the art lifetime-limited single emitters (line width ∼40 MHz) and 2D materials at subwavelength separation without degradation of the emission properties. Our device's nanoscale dimensions enable ultrabroadband tuning (tuning range >400 GHz) and fast modulation (frequency ∼100 MHz) of the emission energy, which renders it an integrated, ultracompact tunable SPS. Conversely, this offers a novel approach to optical sensing of 2D material properties using a single emitter as a nanoprobe.

• A 3D Polymeric Platform for Photonic Quantum Technologies

  2020

  Advanced Quantum Technologies · 32 Zitationen · DOI

  Abstract The successful development of future photonic quantum technologies will much depend on the possibility of realizing robust and scalable nanophotonic devices. These should include quantum emitters like on‐demand single‐photon sources and non‐linear elements, provided their transition linewidth is broadened only by spontaneous emission. However, conventional strategies to on‐chip integration, based on lithographic processes in semiconductors, are typically detrimental to the coherence properties of the emitter. Moreover, such approaches are difficult to scale and bear limitations in terms of geometries. Here an alternative platform is discussed, based on molecules that preserve near‐Fourier‐limited fluorescence even when embedded in polymeric photonic structures. 3D patterns are achieved via direct laser writing around selected molecular emitters, with a fast, inexpensive, and scalable fabrication process. By using an integrated polymeric design, detected photon counts of about 2.4 Mcps from a single cold molecule are reported. The proposed technology will allow for competitive organic quantum devices, including integrated multi‐photon interferometers, arrays of indistinguishable single‐photon sources, and hybrid electro‐optical nanophotonic chips.

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