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The Greater Copenhagen Nanoscience Seminar

This seminar series is organized by the three nanoscience hubs located in the Copenhagen-Lund area. The aim is to to increase awareness about our mutual capabilities and to inspire collaborations.

 

Nanowires that are used in quantum devices

Within a radius of just 25 km, the Copenhagen-Lund region features three strong hubs for nanoscience, with complementary strengths, scientific focus and capabilities:

  • the Nano-Science Center at the University of Copenhagen
  • NanoLund at Lund University
  • a cluster of groups at the Technical University of Denmark

Each hub comprises more than 30 research groups from several disciplines and several hundred staff, has developed advanced facilities for synthesis, characterization and fabrication of nanostructures, has a strong track record in translating discoveries into new technologies, and each is heavily engaged in education at all levels.

Our joint vision is to discover, invent and develop nanosystems with functionalities that emerge from the designed interaction between highly controlled and tunable building blocks.

By combining highly controlled building blocks from very different material systems to realize advanced, functional systems, we aim to jointly address challenges that are out of reach for an individual center.

The aim of this seminar series is to increase awareness about our mutual capabilities and to inspire collaborations.


Scheduled talks: once a month on a Friday at 15:15

Next seminars: 18th June, and 24th September.


18th June 2021: Jesper Nygård (KU): Still going strong - Old nanowires, new tricks

Abstract

Morphology of nanowires that are used in quantum devices

Semiconductor nanowires were pioneered in Lund 20 years back. During the past decades these nanomaterials have been implemented in several branches of physics, photonics, bioscience and nanotechnology. I will give a few key examples from the research on quantum devices in Copenhagen; hybrid quantum dot systems, superconducting devices and units for quantum computing/simulations [1]. In the second part, I will present some of the new nanowire-based structures that were developed for these experiments, e.g. double-wires, kinks, superconducting core-shell structures, shadow junctions, and cross sections [2-4]. Hopefully, that this can lead to a joint discussion on how some of these advances in materials science and nanofabrication might find applications also outside the field of quantum devices. The talk will be 30 minutes followed directly by this discussion.

[1] E. Prada et al., Nature Reviews Physics (2020) [and references therein]
[2] T. Kanne et al., Double nanowires for hybrid quantum devices, arXiv:2103.13938
[3] D. Carrad et al., Shadow Epitaxy for In Situ Growth of Generic Semiconductor/Superconductor Hybrids, Advanced Materials (2020)
[4] T. Kanne et al., Epitaxial Pb on InAs nanowires for quantum devices, Nature Nanotechnology (2021)

 

Short Bio: Jesper Nygård, Professor, Center for Quantum Devices & Nano-Science Center, Niels Bohr Institute, University of Copenhagen

Portrait photo of Jesper Nygård

Jesper Nygård is a professor of condensed matter physics at the Niels Bohr Institute. He holds a PhD in experimental physics (2000) and has worked at CNRS (France), Harvard and Berkeley University (US). His research has focused on electron transport in low-dimensional semiconductors, superconductors and nanostructures, bridging the areas of materials science and quantum devices. For the past decade his group has developed novel devices based on semiconductor nanowires. He is co-founder of the Center for Quantum Devices (qdev.dk) and former head of the Nano-Science Center, Copenhagen.

 


Format

In order to achieve effective cross-fertilization, we will test a seminar format of two parts, where the first consists of 30 min lecture and 15 min questions and the second a 30 min “collaboration-space” where you are invited to stay on in Zoom for discussing ideas and possible collaborations. The total time for the event is between 75 and 90 minutes, depending on the topic and the arrangement with the speaker.


Zoom

The Zoom link will be e-mail to all members of the three research environments. in case you are interested and have not received the link, please contact: Gerda [dot] Rentschler [at] ftf [dot] lth [dot] se


Upcoming seminars

24th September 2021, 15:15, Speaker: Maria Messing, NanoLund; talk title TBA
Maria Messing's page

 


Past Seminars

21st May 2021: Nini Pryds (DTU): Controlling Oxide Heterointerfaces with External Stimuli
Nini Pryds' talk abstract and short bio

19th March 2021: Anders Mikkelsen (NanoLund): Inspired by insects: Nanoscale systems that sense, think and act
Anders Mikkelsen's talk abstract and short bio

19th February 2021: Bo Wegge Laursen, (KU): Super bright fluorescent molecular materials – concepts, challenges and prospective
Bo Wegge Laursen's talk abstract and short bio

22 January 2021: Winnie Svendsen, (DTU): Nanostructures and surfaces for enhanced bio-analysis
Winnie Svendsen's talk abstract and short bio

By combining highly controlled building blocks from very different material systems to realize advanced, functional systems, we aim to jointly address challenges that are out of reach for an individual center.

nanostructure with graphene

A cluster of groups at DTU involved in nanoscience

Groups at DTU involved in nanoscience are affiliated to the following departments: