PHOTONICS IN 2D-MATERIALS

September 2021: Workshop of Photonic Applications of 2D-Materials

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Workshop on Photonic Applications of 2D-Materials on October 5th in Jena. So honoured to speak after Frank Koppens of the ICFO and Matteo Negro of Cambridge Raman Imaging Ltd.

Save the date or better yet, sign up for free here: https://bit.ly/3tzkkMd to attend online or - lo and behold - offline(!).

September 2021: First and Second Poster Prize at DoKDoK lite

Congrats Fatemeh "Ghazale" Abtahi and Katsuya Tanaka of for second and first poster prize at DoKDoK 2021.

Ghazale's work on "Surface Nonlinearities in Dielectric Nanofilm" is part of the SFBNOA is a cooperation with the ALD group of the Fraunhofer IOF, whereas Katsuya's work on "Femtosecond pulse shaping with semiconductor Huygens' metasurface", has been conducted as part of the Max Planck School of Photonics programme.

Keep up the great work and a big shoutout to the organizers of DoKDoK.

August 2021: Nature Communications on Room temerature Exciton Polariton Lattices

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A concept drawing of the structured cavity, in which we have demonstrated exciton-polariton molecules and lattices.

In a collaboration with groups from the Carl von Ossietzky Universität Oldenburg, the Julius-Maximilians-Universität Würzburg, the Friedrich-Schiller-Universität Jena, the Fraunhofer IOF, the National Institute for Materials Science, the Arizona State University we have been able to demonstrate the formation of exciton-polariton lattices. See more at the Nature Communications Website.

The exciton-polaritons are formed by a monolayer of WSe2 residing in a structured and tunable high-q cavity. We show that the structure forms polariton molecules with intricate bandstructures. The dynamics of the system is governed a complex Hamiltonian and we can use the many-body quantum dynamics in the system for quantum annealing into the ground state.

Shoutout to Luckas Lackner as the first author of this fancy paper, Heiko Knopf for his first Nature Comms, and Christian Schneider for setting up this great collaboration.

August 2021: Funding for a Space Mission Confirmed

The Deutsches Zentrum für Luft-und Raumfahrt e.V. just forwarded us the go-ahead for a joint quantum satellite mission. The QUICK3 mission will bring a CubeSat with a high brightness single photon source into orbit for testing and to conduct experiments with single photons in microgravity.

The project will start in September 2021 with a team of the Friedrich-Schiller-Universität Jena, the Ferdinand-Braun-Institut für Höchstfrequenztechnik (FBH), and the Freie Universität Berlin.

Stay tuned for the launch in, hopefully, in 2024.

July 2021: Quantum Team wins InnoSpace Masters Award of the DLR

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The Jena part of the QuVeKS-Team. From left to right: Falk Eilenberger, Kim Lammers, Tobias Vogl, and Stefan Nolte.

I am proud to announce that Tobias Vogl's project QuVeKS has won the InnoSpaceMastersAward of the Deutsches Zentrum für Luft-und Raumfahrt e.V.

In this project researchers of the Friedrich-Schiller-Universität Jena, the CiS Forschungsinstitut für Mikrosensorik GmbH, and the Fraunhofer IOF will develop integrated optical Quantum Processors for Encrypted Communication with satellites. The researchers combine their expertise in single photon sources, femtosecond written waveguides and singe photon detectors to create a flexible toolbox for quantum photonic circuits.

The award is given in the form of funding for PhD positions. If you are interested to join the team, drop a note.

See al the Uni's press statement.

July 2021: CRC 1375 NOA Best Student Paper Award

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Quyet and the NOA Best Student Paper Award

Congratulations to Quyet Ngo, how was awarded the Best Student Paper Award of the 2021 Meeting of the CRC 1375 NOA. His "Scalable Functionalization of Optical Fibers Using Atomically Thin Semiconductors" shows, that semiconducting 2D-Materials can be integrated into microstructured optical fibers in a scalable process. This opens the path towards new applications in quantum enhanced sensing and nonlinear optics.

Go, Qyuet!

But also: thanks to the entire multidisciplinary team for the support. The paper and the ongoing research is made possible by contributions from the FSU, the Fraunhofer IOF, the Leibniz IPHT, the University of Sydney, the University of Adelaide and the Max Planck School of Photonics.

The work was supported by the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation (SFB/CRC 1375 NOA), BMBF (NanoScopeFutur2D Research Group) and the Thüringer Aufbaubank (2DSENS Research Group).

June 2021: Lateral Heterostructures of 2D-Materials: Advanced Functional Materials Cover Page

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A Sneak Peek of the Cover Page

Congratulations to Antony George, Emad Najafidehaghani, and the entire team of the Group of Andrey Turchanin on making the cover page of this month's edition of Advanced Functional Materials. Find the fine piece at https://bit.ly/36eK1GY and follow the link to the first demonstration of a one-step grown edge-epitaxial lateral TMD heterostructures.

The team of the Friedrich-Schiller-Universität Jena, Universität Ulm, Leibniz-Institut für Photonische Technologien, Fraunhofer IOF, and Max Planck School of Photonics demonstrate atomically sharp transitions of two types of semiconducting 2D crystals. They use them to demonstrate atom-scale optoelectronic devices, such as LEDs and photodetectors.

The work was enabled by funding of the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation, HORIZON2020, Bundesministerium für Bildung und Forschung, Europäischer Sozialfonds ESF and Freistaat Thüringen.

June 2021: See you at CLEO Europe 2021

See you all for CLEO Europe next week. Sadly this year without Weißwurst and Bretzn but with a talk from this group for almost every day of the week. As there is no proper program app at the moment so you'll have to search through the preliminary program PDF. So save you time, here are our talks:

  • Monday: Tobias Vogl on "Quantum advantage in interferometry using single photons emitted from 2D hexagonal boron nitride." EA-P.7 13:30
  • Tuesday: Quyet Ngo on "Scalable Integrated Waveguide with CVD-Grown MoS2 and WS2 Monolayers on Exposed-Core Fibers". CD-P.8 13:30
  • Tuesday: Luckas Lackner on "Fully tuneable Bloch-Band polaritons emerging from WS2 monolayer excitons in an optical lattice at room temp". EI-2.5 17:30
  • Wednesday: Heiko Knopf on "Second Harmonic Generation in monolayer WS2 with double resonant Bragg-Cavities". EG-4.4 15:15

May 2021: Lateral Heterostructures of 2D-Materials: the World's Smallest LED

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Images of lateral TMD heterostructures

Check out our new work on lateral heterostructures of 2D-Materials. In a collaboration with the group of Andrey Turchanin from the university's IPC we have been able to contribute to their first demonstration of one-step grown edge-epitaxial lateral TMD heterostructures. You can think of these heterostructures as two different types of semiconductors, which are attached with perfect crystal symmetry in an atomically sharp transition, forming a perfectly one-dimensional pn-junction. The teams also uses them to demonstrate atom-scale optoelectronic devices, such as LEDs and photodetectors.

Congratulations to entire team of the Friedrich-Schiller-Universität Jena, Universität Ulm, Leibniz-Institut für Photonische Technologien, and Fraunhofer IOF, and Max Planck School of Photonics, in particular to Emad Najafidehaghani and Antony George who lead this work.

This work was enabled by funding of the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation, HORIZON2020, Bundesministerium für Bildung und Forschung, Europäischer Sozialfonds ESF and the Freistaat Thüringen.

April 2021: Quantum Advantage in Sensing

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A three path interferometer

Check out our new work on quantum sensing with single photons at https://bit.ly/3wk14my. The work demonstrates a high-precision validation experiment for Born's rule in a miniature interferometric setup. We show that its precision is almost entirely due to the use of a single photon sources, yielding a demonstration of quantum advantage in sensing.

Congratulations to Tobias Vogl, to his first paper entirely created at the Friedrich-Schiller-Universität Jena. A big thank you to all the collaborators from the The Australian National University and Fraunhofer IOF.

The work was supported by the BMBF (13XP5053A), the European Social Funds, the federal state of Thüringia (2019FGR0101), and the Australian Research Council (CE170100012 and FL150100019).

March 2021: Beyond The Ivory Tower

Discover the industry perspective on applications of 2D-Materials such as Graphene with four exciting industry-talks at the 1st 2D-Mat-Net Workshop, on Marth 25th. Topics range from production to photonics and water purification with a special focus on SME. The workshop is free of charge but you need to sign up.

March 2021: New positions for PostDoc and PhD students in Quantum Photonics avaiable

We are offering three new positions for PhD students and PostDocs in Qantum Photonics. Please see Jobs for more info.

January 2021: Quantum Photonics for the Maker-Community

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Logo of the DaylightQuanta Project

Quantum Photonics is frequently assumed to be an experts-only topic, which is hard to understand even to geeks. In our newly funded project maQUer.SPACE, we set out to change this paradigm. In a collaboration with the Lichtwerkstatt Jena, we will develop hands-on quantum photonics experiments and teaching materials for the interested general public. Stay tuned for events and publications.

December 2020: New project in Quantum Communication

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Logo of the DaylightQuanta Project

Tobias Vogl has been granted a "Sachbeihilfe"-Project by the German Research Community DFG. Congratulations Tobias.

His project, entitled "DaylightQuanta" will investigate and demonstrate the feasibility of his hBN-Single-Photon-Emitter Plattform for usage in robust and miniaturized free-space quantum communication and quantum key distribution schemes.

The project is due to commence as soon as possible and we are looking forward onto new and exciting results on the topic.

November 2020: 2D-Materials on the Cover of Advanced Materials

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The inside back cover of Advanced Material's November 2020 issue.

In our last publication "Scalable Functionalization of Optical Fibers Using Atomically Thin Semiconductors" we have shown, that semiconducting 2D-Materials can be integrated into microstructured optical fibers in a scalable process. This opens the path towards new applications in quantum enhanced sensing and nonlinear optics. We are very happy that the accompanying artwork, created by Christian Süß and Walter Oppel of the Fraunhofer IOF, has been selected to feature in this months inside back cover of Advanced Materials.

Tanks to the entire mutildisciplinary and international team of the FSU, the Fraunhofer IOF, the Leibniz IPHT, the University of Sydney, the University of Adelaide and the Max Planck School of Photonics. It's been awesome to work with you and I am looking forward to the next steps.

The work was supported by the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation (SFB/CRC 1375 NOA), BMBF (NanoScopeFutur2D Research Group) and the Thüringer Aufbaubank (2DSENS Research Group).

November 2020: Our work among the top 15 Must Reads of OME for 2D-Material

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2D-Materials as seen through a microscope before and after being integrated into a monolithic bragg mirror cavity.

Heiko Knopf's "maiden publication" in this group with the somewhat lengthy title "Integration of atomically thin layers of transition metal dichalcogenides into high-Q, monolithic Bragg-cavities: an experimental platform for the enhancement of the optical interaction in 2D-materials" has been selected as one the "15 Must Reads of Optics Materials Express for 2D-Materials". In his work Heiko and co-auhtors of seven different institutions describe process that allows us to integrate transition metal dichalcogenides seamlessly into dielectric materials.

The work it self describes the formation of a monolothic cryo-compatible high-q resonantor for experiments with polariton-excitons. Congratulations Heiko and thank you to the team from Institute of Applied Physics, Friedrich Schiller University Jena, Fraunhofer-Institute for Applied Optics and Precision Engineering IOF, Department of Technical Physics/Julius-Maximilians-Universität Würzburg, SUPA School of Physics and Astronomy/University of St. Andrews (UK), Arizona State University (US), National Institute for Materials Science (Japan).

Fun fact: the paper is also - to the best of our knowledge the first paper ever to be published with the Max Planck School of Photonics as an independent affiliation.

September 2020: 2D-Materials on Optical Fibers

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2D Materials on Optical Fibers.

In our last publication "Scalable Functionalization of Optical Fibers Using Atomically Thin Semiconductors" we have shown, that semiconducting 2D-Materials can be integrated into microstructured optical fibers in a scalable process. This opens the path towards new applications in quantum enhanced sensing and nonlinear optics.

Also check out the press release of the university.

Congratulations to Gia Quyet Ngo to his first paper and thanks to the entire mutildisciplinary and international team of the FSU, the Fraunhofer IOF, the Leibniz IPHT, the University of Sydney, the University of Adelaide and the Max Planck School of Photonics. It's been awesome to work with you and I am looking forward to the next steps.

The work was supported by the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation (SFB/CRC 1375 NOA), BMBF (NanoScopeFutur2D Research Group) and the Thüringer Aufbaubank (2DSENS Research Group).

September 2020: New Optics Letters Publication by Nils Geib

Check out the latest OpticsLetters publication of my colleague Nils Geib on "Discrete dispersion scan setup for measuring few-cycle laser pulses in the mid-infrared" . In his work, he shows that dscan can estimate important laser pulse features, even if simplified dramatically. This finding is the basis for a demonstration of a simple and robust pulse reconstruction device in the midIR.

Congrats, Nils!

And thanks to the team from IAP and IOQ, IOF, HIJ in Jena, INRS-EMT in Quebec, FHI in Berlin, UCal in Berkeley for the great support and input. The work recieved major support from the DFG via SFB 1375 #NOA and IRTG 2101.

May 2020: OTZ-Interview with Heiko Knopf

Read local group member Heiko Knopf discuss his newest patent and the role of optical coatings with 2D-materials in everyday life with OTZ, a regional newspapers.

March 2020: MDR-Thüringenjournal reports on FastPhoton

The endless fascination of Quantum Photonics is catching on with the public. See the report of the MDR on our ideas on Quantum Communications and the goals of the research group FastPhoton.

January 2020: Team TruQuant wins 2nd place in the Elevator Pitch of the Digital Innovation Hub Photonics

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A Cube-Sat prototype for a space-based single-photon sources using 2D-Materials.

A team consisting of Tobias Vogl, Heiko Knopf and Falk Eilenberger have won the second prize of the elevator pitch of the Digital Innovation Hub Photonics. They presented a concept for the commercialization of their defect state emitters in hexagonal Boron-Nitride. Their bid is based on the unique properties of these defect emitters, which make them ideal for affordable, small-scale, turn-key single photon sources. Such sources are  are highly sought after for research in quantum photonics, quantum cryptography and quantum computing and will be a core component for future applications in quantum communication architectures.

The winners will use the research budget to develop prototype sources and to evaluate commercialization strategies. Tobias Vogl stated: "I am very grateful for the opportunity to present our platform and the initial prototype to an audience, which was much more diverse and much closer to application topics, as commonly found in scientific conferences. Of course, I am extremely happy to have won the second prize and very eager to put the research budget to best use. In fact, Fraunhofer IOF's infrastructure is perfect for our development goals and the DIHP is a superbly supportive environment for our way ahead."

The team does also congratulate the competition for the high quality of their ideas and the presentation.

December 2019: New Project Research Group on Secure Communication started

We are happy to announce the commencement of the TAB-funded research group "FastPhoton," which will explore electro-photonic solutions with 2D-Materials for single photons sources. These source will be a key building block for future secure communication systems, which are based on the laws of quantum physics.

See press release by the Friedrich Schiller University and coverage in the Süddeutsche Zeitung as well as in the MDR.

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A Cube-Sat prototype for a space-based single-photon sources using 2D-Materials.

June 2019: See you in Munich

We are at the CLEO/ World of Photonics Congress with 4 talks and posters. Find the newest results form our group at:

  • Monday, 14:30 at Hall A1 Room 2: Nils Geib on "Common Pulse Retrieval Algorithm: a Fast and Universal Method to Retrieve Ultrashort Pulses"
  • Tuesday, 09:00 at ICM Room 4b, Heiko Knopf on "MoSe2 and WSe2 embedded in Bragg-Cavities with high Q-factors enabling strong exciton-polariton coupling in 2D-systems"
  • Wednesday, 13:00 at Hall B0, Athira Kuppadakkath "Investigation of Photoluminescence Properties of 2D-Nanoparticles to be used as Fluorescence Markers in Microscopy" on and Robin Schock on "Single-Layer MoS2 Grown on Exposed-Core Optical Fibers: a new Approach to Waveguide Transition Metal Dichalcogenide Photonics"

March 2018: With new ideas back o the IAP

On the 1st of March, the new junior research group "2D Nanomaterials for the Microscopy of the Future (NanoScopeFutur-2D)" will be launched at the Institute of Applied Physics....
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