Quantum Nanostructures and Nanofabrication Group

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New Publication “Superconducting Nanowire Spiking Element for Neural Networks ” | Quantum Nanostructures and Nanofabrication Group As the limits of traditional von Neumann computing come into view, the brain’s ability to communicate vast quantities of information using low-power spikes has become an increasing source of inspiration for alternative architectures. Key to the success of these largescale neural networks is a powe...

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New Publication “Fabrication of gold nanostructures using wet lift-off without adhesion promotion” | Quantum Nanostructures and Nanofabrication Group The use of an intervening adhesion layer is essential in reliable fabrication of noble metallic nanostructures for optical and electronic devices. However, many emerging applications such as plasmonics and transfer printing raise the demand of metallic structures without adhesion layers, either to m...

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New Publication “Electron energy loss of ultraviolet plasmonic modes in aluminum nanodisks” | Quantum Nanostructures and Nanofabrication Group We theoretically investigated electron energy loss spectroscopy (EELS) of ultraviolet surface plasmon modes in aluminum nanodisks. Using full-wave Maxell electromagnetic simulations, we studied the impact of the diameter on the resonant modes of the nanodisks. We found that the mode behavior can be....

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New Publication “Light phase detection with on-chip petahertz electronic networks” | Quantum Nanostructures and Nanofabrication Group Ultrafast, high-intensity light-matter interactions lead to optical-field-driven photocurrents with an attosecond-level temporal response. These photocurrents can be used to detect the carrier-envelope-phase (CEP) of short optical pulses, and enable optical-frequency, petahertz (PHz) electronics for...

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New Publication “Nanostructured-membrane electron phase plates” | Quantum Nanostructures and Nanofabrication Group Electron beams can acquire designed phase modulations by passing through nanostructured material phase plates. These phase modulations enable electron wavefront shaping and benefit electron microscopy, spectroscopy, lithography, and interferometry. However, in the fabrication of electron phase plate...

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New Publication “Large-area microwire MoSi single-photon detectors at 1550 nm wavelength” | Quantum Nanostructures and Nanofabrication Group We demonstrate saturated internal detection efficiency at 1550 nm wavelengths for meander-shaped superconducting nanowire single-photon detectors made of 3 nm thick MoSi films with widths of 1 and 3 μm and active areas up to 400 × 400 μm2. Despite hairpin turns and a large number of squ...

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New Publication “Resolving photon numbers using a superconducting tapered nanowire detector” | Quantum Nanostructures and Nanofabrication Group Time- and number-resolved photon detection is crucial for quantum information processing. Existing photon-number-resolving (PNR) detectors usually suffer from limited timing and dark-count performance or require complex fabrication and operation. Here, we demonstrate a PNR detector at telecommunicat...

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New Publication “Demonstration of sub-3 ps temporal resolution with a superconducting nanowire single-photon detector” | Quantum Nanostructures and Nanofabrication Group Improvements in temporal resolution of single-photon detectors enable increased data rates and transmission distances for both classical and quantum optical communication systems, higher spatial resolution in laser ranging, and observation of shorter-lived fluorophores in biomedical imaging. In rece...

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New Publication “Single-Photon Single-Flux Coupled Detectors” | Quantum Nanostructures and Nanofabrication Group In this work, we present a novel device that is a combination of a superconducting nanowire single-photon detector and a superconducting multilevel memory. We show that these devices can be used to count the number of detections through single-photon to single-flux conversion. Electrical characteriz...

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New Publication “A general theoretical and experimental framework for nanoscale electromagnetism” | Quantum Nanostructures and Nanofabrication Group The macroscopic electromagnetic boundary conditions, which have been established for over a century, are essential for the understanding of photonics at macroscopic length scales. Even state-of-the-art nanoplasmonic studies, exemplars of extremely interface-localized fields, rely on their validity.....

Congratulations to Andrew for being awarded Best Poster at the 706th W. E. Heraeus Seminar!

Andrew Dane awarded Best Poster at the 706th W.E. Heraeus Seminar | Quantum Nanostructures and Nanofabrication Group Congratulations to Andrew Dane, who won the best poster award at the 706th W.E. Heraeus Seminar, titled Superconducting Kinetic Inductances for his work on high-Q superconducting niobium resonators incorporating nanoscale quasiparticle traps.

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New Publication “Focused-helium-ion-beam blow forming of nanostructures: radiation damage and nanofabrication” | Quantum Nanostructures and Nanofabrication Group Targeted irradiation of nanostructures by a finely focused ion beam provides routes to improved control of material modification and understanding of the physics of interactions between ion beams and nanomaterials. Here, we studied radiation damage in crystalline diamond and silicon nanostructures u...