Explanipedia

Momentum-space non-Hermitian skin effect in an exciton-polariton system Open

Yow-Ming, H. Hu, Mateusz Król, Daria A. Smirnova, Lev A. Smirnov , et al. · 2025

Localization of a macroscopic number of eigenstates on a real-space boundary, known as the non-Hermitian skin effect, is one of the striking topological features emerging from non-Hermiticity. Realizing this effect typically requires perio…

Direct experimental access to the bulk band inversion in a topological metamaterial Open

S. Widmann, Siddhartha Dam, Carl Mayer, David Laibacher, M. Kamp , et al. · 2025

Topological phases in exciton-polaritons and other metamaterial platforms have attracted significant attention due to their flexibility as Hamiltonian simulators. In previous works, signatures of topology have mainly been investigated from…

Quantum spin Hall effect in III-V semiconductors at elevated temperatures: Advancing topological electronics Open

Manuel Meyer, J. I. Baumbach, S. S. Krishtopenko, A. Wolf, Monika Emmerling , et al. · 2025

The quantum spin Hall effect (QSHE), a hallmark of topological insulators, enables dissipationless, spin-polarized edge transport and has been predicted in various two-dimensional materials. However, challenges such as limited scalability,…

Embedding monolayers of 2D materials in directly sputtered monolithic cavities for strong light-matter coupling Open

Mathias Federolf, Subhamoy Sahoo, Ankur Arora, Atanu Patra, Monika Emmerling , et al. · 2025

Front Cover: Two‐Photon Interference from an InAs Quantum Dot Emitting in the Telecom C‐Band (Adv. Quantum Technol. 10/2025) Open

Jaewon Kim, Jochen Kaupp, Yorick Reum, Giora Peniakov, Johannes Michl , et al. · 2025

Two‐Photon Interference from an InAs Quantum Dot Emitting in the Telecom C‐Band Open

Jae‐Won Kim, Jochen Kaupp, Yorick Reum, Giora Peniakov, Johannes Michl , et al. · 2025

Two‐photon interference from an InAs/InAlGaAs quantum dot (QD) emitting in the telecom C‐band with a raw two‐photon interference visibility of % is demonstrated. This is achieved by a two‐fold approach: an improvement of the molecular beam…

Two‐Photon Interference from an InAs Quantum Dot Emitting in the Telecom C‐Band Open

Jaewon Kim, Jochen Kaupp, Yorick Reum, Giora Peniakov, Johannes Michl , et al. · 2025

Two‐photon interference from an InAs/InAlGaAs quantum dot (QD) emitting in the telecom C‐band with a raw two‐photon interference visibility of % is demonstrated. This is achieved by a two‐fold approach: an improvement of the molecular beam…

Bismuthene Under Cover: Graphene Intercalation of a Large Gap Quantum Spin Hall Insulator Open

Lukas Gehrig, Cédric Schmitt, Jonas Erhardt, Bing Liu, Tim Wagner , et al. · 2025

The quantum spin Hall insulator bismuthene, a two‐third monolayer of bismuth on SiC(0001), is distinguished by helical metallic edge states that are protected by a groundbreaking 800 meV topological gap, making it ideal for room temperatur…

Deterministic and highly indistinguishable single photons in the telecom C-band Open

N. Hauser, Matthias Bayerbach, Jochen Kaupp, Yorick Reum, Giora Peniakov , et al. · 2025

Quantum dots are promising candidates for deterministic single-photon sources, yet achieving high photon indistinguishability at telecom wavelengths remains a critical challenge. Here, we report a quantum dot-based single-photon source ope…

A travelling-wave strategy for plant–fungal trade Open

Loreto Oyarte Gálvez, Corentin Bisot, Philippe Bourrianne, Rachael I.M. Cargill, Malin Klein , et al. · 2025

For nearly 450 million years, mycorrhizal fungi have constructed networks to collect and trade nutrient resources with plant roots 1,2 . Owing to their dependence on host-derived carbon, these fungi face conflicting trade-offs in building …

Graphene intercalation of the large gap quantum spin Hall insulator bismuthene Open

L. Gehrig, Cédric Schmitt, Jonas Erhardt, Bing Liu, Tim Wagner , et al. · 2025

The quantum spin Hall insulator bismuthene, a two-third monolayer of bismuth on SiC(0001), is distinguished by helical metallic edge states that are protected by a groundbreaking 800 meV topological gap, making it ideal for room temperatur…

Modal complexity as a metric for Anderson localization Open

Sandip Mondal, Kedar Khare, S. E. Skipetrov, M. Kamp, Sushil Mujumdar · 2024

International audience

Modal complexity as a metric for Anderson localization Open

Sandip Mondal, Kedar Khare, Sergey E. Skipetrov, M. Kamp, Sushil Mujumdar · 2024

We present a thorough study of the complexity of optical localized modes in two-dimensional disordered photonic crystals. Direct experimental measurements of complexity were made using an interferometric setup that allowed for extraction o…

Integrating planetary health education into tertiary curricula: a practical toolbox for implementation Open

Zerina Lokmic‐Tomkins, Liza Barbour, Jessica LeClair, Jeneile Luebke, Sarah L. McGuinness , et al. · 2024

Objective To present a series of case studies from our respective countries and disciplines on approaches to implementing the Planetary Health Education Framework in university health professional education programs, and to propose a curri…

Epitaxial RuO2 and IrO2 films by pulsed laser deposition on TiO2(110) Open

Philipp Keßler, Tim Waldsauer, Vedran Jovic, M. Kamp, M. Schmitt , et al. · 2024

We present a systematic growth study of epitaxial RuO2(110) and IrO2(110) on TiO2(110) substrates by pulsed laser deposition. We describe the main challenges encountered in the growth process, such as a deteriorating material flux due to l…

Molecular Beam Epitaxy of Homogeneous Topological HgTe on Doped InAs Substrate Open

Mahitosh Biswas, Lena Fürst, M. Kamp, S. Schreyeck, H. Buhmann , et al. · 2024

HgTe has been considered to be one of the most versatile topological materials. Depending on the in‐plane strain, Weyl and Dirac semi‐metal, as well as topological insulator phases, are feasible. Here, for the first time it is reported, th…

Quantum modulation of a coherent state with a single electron spin Open

P. Androvitsaneas, A. B. Young, Thomas Nutz, J. M. Lennon, S. Mister , et al. · 2024

The interaction of quantum objects lies at the heart of fundamental quantum physics and is key to a wide range of quantum information technologies. Photon-quantum-emitter interactions are among the most widely studied. Two-qubit interactio…

Epitaxial RuO$_2$ and IrO$_2$ films by pulsed laser deposition on TiO$_2$(110) Open

Philipp Keßler, Tim Waldsauer, Vedran Jovic, M. Kamp, Matthias Schmitt , et al. · 2024

We present a systematic growth study of epitaxial RuO$_2$(110) and IrO$_2$(110) on TiO$_2$(110) substrates by pulsed laser deposition. We describe the main challenges encountered in the growth process, such as a deteriorating material flux…

Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit Open

Hannah Thiel, Lennart Jehle, Robert J. Chapman, Stefan Frick, Hauke Conradi , et al. · 2024

Mass-deployable implementations for quantum communication require compact, reliable, and low-cost hardware solutions for photon generation, control and analysis. We present a fiber-pigtailed hybrid photonic circuit comprising nonlinear wav…

Designing Complex Tapestries with Photography‐Inspired Manipulation of Self‐Organized Thin‐Films Open

Christiaan T. van Campenhout, Marloes H. Bistervels, Jeppe J. Rietveld, Hinco Schoenmaker, M. Kamp , et al. · 2024

Thin‐films patterned with complex motifs are of fundamental interest because of their advanced optical, mechanical and electronic properties, but fabrication of these materials remains challenging. Self‐organization strategies, such as imm…

Compose and Convert: Controlling Shape and Chemical Composition of Self‐Organizing Nanocomposites Open

Marloes H. Bistervels, Arno van der Weijden, Hinco Schoenmaker, M. Kamp, Willem L. Noorduin · 2024

Organizing the right material at the right place has the potential to revolutionize bottom‐up assembly of functional architectures. Despite tremendous progress, this is still difficult in particular because control over chemical compositio…

Temperature dependence of refractive indices of , , , and in the midinfrared spectral range determined by combined ellipsometry and Fourier-transform spectroscopy Open

Monika Mikulicz, Tristan Smółka, Michał Rygała, Mikołaj Badura, Wojciech Kijaszek , et al. · 2024

We present the results of Fourier-transform measurements for determination of refractive indices of four semiconductor alloys in the midinfrared spectral range from 10 to 300 K. We investigate double-sided-polished, undoped InP and GaAs su…

Achieving environmental stability in an atomically thin quantum spin Hall insulator via graphene intercalation Open

Cédric Schmitt, Jonas Erhardt, Philipp Eck, M. Schmitt, Kyungchan Lee , et al. · 2024

Light-controlled morphological development of self-organizing bioinspired nanocomposites Open

Marloes H. Bistervels, Niels T. Hoogendoorn, M. Kamp, Hinco Schoenmaker, Albert M. Brouwer , et al. · 2024

Modulations in light intensity enable switching between growth modes, patterning, and sculpting of photochemically formed self-organizing nanocomposites.

Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit Open

Hannah Thiel, Lennart Jehle, Robert J. Chapman, Stefan Frick, Hauke Conradi , et al. · 2024

Mass-deployable implementations for quantum communication require compact, reliable, and low-cost hardware solutions for photon generation, control and analysis. We present a fiber-pigtailed hybrid photonic circuit comprising nonlinear wav…

Linear colossal magnetoresistance and magnetic textures in thin films on Open

Teresa Tschirner, Berengar Leikert, Felix Kern, Daniel Wolf, Axel Lubk , et al. · 2023

International audience

Light-driven nucleation, growth, and patterning of biorelevant crystals using resonant near-infrared laser heating Open

Marloes H. Bistervels, Balázs Antalicz, M. Kamp, Hinco Schoenmaker, Willem L. Noorduin · 2023

Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 Open

Teresa Tschirner, Philipp Keßler, R. D. Gonzalez Betancourt, Tommy Kotte, Dominik Kriegner , et al. · 2023

Observations of the anomalous Hall effect in RuO2 and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermagnet…

Fabrication of low-loss III-V Bragg-reflection waveguides for parametric down-conversion Open

Hannah Thiel, Marita Wagner, Bianca Nardi, A Schlager, Robert J. Chapman , et al. · 2023

Entangled photon pairs are an important resource for quantum cryptography schemes that go beyond point-to-point communication. Semiconductor Bragg-reflection waveguides are a promising photon-pair source due to mature fabrication, integrab…

Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 Open

Teresa Tschirner, Philipp Keßler, R. D. Gonzalez Betancourt, Tommy Kotte, Dominik Kriegner , et al. · 2023

Observations of the anomalous Hall effect in RuO$_2$ and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermag…

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