A5005973616- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Mechanical and Optical Resonators
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Analytical Chemistry and Sensors
- Advanced Fiber Laser Technologies
- Luminescence and Fluorescent Materials
- Quantum Mechanics and Applications
- Molecular Junctions and Nanostructures
- Atomic and Subatomic Physics Research
- Spectroscopy and Laser Applications
- Spectroscopy and Quantum Chemical Studies
- Advanced Fluorescence Microscopy Techniques
- Quantum Computing Algorithms and Architecture
- Biosensors and Analytical Detection
- Spectroscopy Techniques in Biomedical and Chemical Research
- Chemical and Physical Properties of Materials
- Nanoplatforms for cancer theranostics
- Advanced Electron Microscopy Techniques and Applications
- Force Microscopy Techniques and Applications
- Quantum and electron transport phenomena
- Diamond and Carbon-based Materials Research
- Thermal Radiation and Cooling Technologies
National Institute of Optics
2020-2024
National Research Council
2023
University of Naples Federico II
2023
WWF Italia
2023
University of Florence
2017-2022
Instituto de Óptica "Daza de Valdés"
2022
European Theoretical Spectroscopy Facility
2022
Istituto Nazionale di Ricerca Metrologica
2020
Institute for Complex Systems
2020
Quantum Science and Technology in Arcetri
2019
Quantum technologies could largely benefit from the control of quantum emitters in sub-micrometric size crystals. These are naturally prone to integration hybrid devices, including heterostructures and complex photonic devices. Currently available nanocrystals suffer spectral instability, preventing their use as single-photon sources for most optics operations. In this work we report on performances emission organic (average hundreds nm), made anthracene (Ac) doped with dibenzoterrylene...
Quantum key distribution (QKD) allows the of cryptographic keys between multiple users in an information-theoretic secure way, exploiting quantum physics. While current QKD systems are mainly based on attenuated laser pulses, deterministic single-photon sources could give concrete advantages terms secret rate (SKR) and security owing to negligible probability multi-photon events. Here, we introduce demonstrate a proof-of-concept system molecule-based source operating at room temperature...
Abstract Single‐photon sources (SPSs) based on quantum emitters hold promise in radiometry as metrology standard for photon fluxes at the low light level. Ideally this requires control over flux a wide dynamic range, sub‐Poissonian statistics, and narrow‐band emission spectrum. In work, monochromatic SPS an organic dye molecule is presented, whose traceably measured to be adjustable between 144 000 1320 photons per second wavelength of (785.6 ± 0.1) nm, corresponding optical radiant 36.5 334...
The local interaction of charges and light in organic solids is the basis distinct fundamental effects. We here observe, at single-molecule scale, how a focused laser beam can locally shift by hundreds times their natural line width and, persistent way, transition frequency chromophores cooled liquid helium temperature different host matrices. Supported quantum chemistry calculations, results be interpreted as effects photoionization cascade, leading to stable electric field, which...
Single molecules in solid state matrices have been proposed as sources of single photon Fock states back 20 years ago. Their success quantum optics and many other research fields stems from the simple recipes used preparation samples, with hundreds nominally identical isolated molecules. Main challenges today for their application photonic technologies are optimization light extraction on-demand emission indistinguishable photons. We here present Hong–Ou–Mandel (HOM) experiments photons...
Scalability and miniaturization are hallmarks of solid-state platforms for photonic quantum technologies. Still a main challenge is two-photon interference from distinct emitters on chip. This requires local tuning, integration, novel approaches to understand tame noise processes. A promising platform that molecular single-photon sources. Thousands molecules with optically tunable emission frequency can be easily isolated in solid matrices triggered pulsed excitation. We here discuss...
Abstract The successful development of future photonic quantum technologies will much depend on the possibility realizing robust and scalable nanophotonic devices. These should include emitters like on‐demand single‐photon sources non‐linear elements, provided their transition linewidth is broadened only by spontaneous emission. However, conventional strategies to on‐chip integration, based lithographic processes in semiconductors, are typically detrimental coherence properties emitter....
Two-photon interference underlies the functioning of many quantum photonics devices. It also serves as prominent tool for testing indistinguishability distinct photons. However, their time-spectral profile becomes more involved, extracting relevant parameters, foremost central frequency difference, may become difficult. In a parametric approach, these arise from need an exhaustive model combined with limited count statistics. Here we discuss solution to curtail effects on evaluation...
Abstract In the realm of fundamental quantum science and technologies, non‐classical states light, such as single‐photon Fock states, are widely studied. However, current standards metrological procedures not optimized for low light levels. Progress in this crucial scientific domain depends on innovative metrology approaches, utilizing reliable devices based effects. A new generation molecule‐based sources is presented, combining their integration a polymeric micro‐lens with pulsed...
An understanding of heat transport is relevant to developing efficient strategies for thermal management in areas study such as microelectronics, well fundamental science purposes. However, the measurement temperatures nanostructured environments and cryogenic conditions remains a challenging task, requiring both high sensitivity noninvasive approaches. Here, we present portable nanothermometer based on molecular two-level quantum system that operates (3–20)-K temperature range, with spatial...
Solid-state single photon sources (SPSs) with narrow line width play an important role in many leading quantum technologies. Within the wide range of SPSs studied to date, fluorescent molecules hosted organic crystals stand out as bright, photostable a lifetime-limited optical resonance at cryogenic temperatures. Furthermore, recent results have demonstrated that photostability and widths are still observed from nanocrystalline environment, which paves way for their integration photonic...
In the realm of fundamental quantum science and technologies, non-classical states light, such as single-photon Fock states, are widely studied. However, current standards metrological procedures not optimized for low light levels. Progress in this crucial scientific domain depends on innovative metrology approaches, utilizing reliable devices based effects. We present a new generation molecule-based single photon sources, combining their integration polymeric micro-lens with pulsed...
The Stark effect provides a powerful method to shift the spectra of molecules, atoms and electronic transitions in general, becoming one simplest most straightforward way tune frequency quantum emitters by means static electric field. At same time, order reduce emitter sensitivity charge noise, inversion symmetric systems are typically designed, providing stable emission frequency, with quadratic-only dependence on applied However, such nonlinear behaviour might reflect correlations between...
The Stark effect provides a powerful method to shift the spectra of molecules, atoms, and electronic transitions in general, becoming one simplest most straightforward ways tune frequency quantum emitters by means static electric field. At same time, order reduce emitter sensitivity charge noise, inversion symmetric systems are typically designed, providing stable emission with quadratic-only dependence on applied However, such nonlinear behavior might be reflected correlations between...
In today’s medicine, the celerity of bio-assays analysis is crucial for timely selection appropriate therapy and hence its effectiveness, especially in case diseases characterized by late onset symptoms. this paper, a lens-less fiber optics-based fluorescence sensor designed measurement labeled presented potential early diagnosis sepsis via C-reactive protein (CRP) detection demonstrated. The performance results from combination two key elements: planar antenna that redirects marker emission...
Quantum technologies could largely benefit from the control of quantum emitters in sub-micrometric size crystals. These are naturally prone to integration hybrid devices, including heterostructures and complex photonic devices. Currently available sculpted nanocrystals suffer spectral instability, preventing their use as single photon sources e.g., for most optics operations. In this work we report on unprecedented performances single-photon emission organic (average hundreds...
The efficient interaction of light with quantum emitters is crucial to most applications in nano and technologies. Effective excitation collection are key ingredients for the use manipulation generated single photons. We have recently demonstrated how molecules as can be deposited a planar optical antenna, resulting narrow radiation pattern increased efficiency [1]. On-chip integration miniaturization allows minimized losses tailored interaction. In present contribution we demonstrate...
Understanding the transport mechanisms and properties of complex networks is fundamental for comprehension a vast class phenomena, from state transfer on spin network to light-harvesting in photosynthetic complexes. It has been theoretically experimentally demonstrated that noise can enhance when system parameters are properly tuned, an effect known as noise-assisted (NAT). In this work we investigate role initial entanglement efficiency two walkers noisy network. By using formalism quantum...
Single molecules in solid-state matrices have been proposed as sources of single-photon Fock states back 20 years ago. Their success quantum optics and many other research fields stems from the simple recipes used preparation samples, with hundreds nominally identical isolated molecules. Main challenges today for their application photonic technologies are optimization light extraction on-demand emission indistinguishable photons. We here present Hong-Ou-Mandel experiments photons emitted by...
We present Hong-Ou-Mandel (HOM) experiments with photons emitted by a single molecule of Dibenzoterrylene in an Anthracene nanocrystal under pulsed excitation, and preliminary results for two spatially-separated molecules on the same sample.