Zobrazeno 1 - 10
of 658
pro vyhledávání: '"Harald, Giessen"'
Publikováno v:
AIP Advances, Vol 14, Iss 10, Pp 105328-105328-5 (2024)
Trace gas analysis is a key tool for the investigation of man-made environmental pollution as well as for early detection of respiratory diseases. To detect tiny concentrations, sensitive methods such as cavity ring down spectroscopy or plasmonic sen
Externí odkaz:
https://doaj.org/article/9646583388fd45fab0c84bb4f7740a9a
Autor:
Mingchao Zhang, Yohan Lee, Zhiqiang Zheng, Muhammad Turab Ali Khan, Xianglong Lyu, Junghwan Byun, Harald Giessen, Metin Sitti
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-10 (2023)
Abstract Creating micro/nanostructures containing multi-channel information within responsive hydrogels presents exciting opportunities for dynamically changing functionalities. However, fabricating these structures is immensely challenging due to th
Externí odkaz:
https://doaj.org/article/c65cb6dbad1c4390b93f665b6a3b76fd
Autor:
Cenk Beydeda, Konstantin Nikolaou, Marius Tochtermann, Nikolaj G. Ebensperger, Gabriele Untereiner, Ahmed Farag, Philipp Karl, Monika Ubl, Harald Giessen, Martin Dressel, Marc Scheffler
Publikováno v:
AIP Advances, Vol 13, Iss 10, Pp 105027-105027-13 (2023)
Planar superconducting microwave transmission line resonators can be operated at multiple harmonic resonance frequencies. This allows covering wide spectral regimes with high sensitivity, as it is desired, e.g., for cryogenic microwave spectroscopy.
Externí odkaz:
https://doaj.org/article/d7a081c44e414a23ba69727510e60a44
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-9 (2023)
Floquet theory describes transient states driven by a light-matter interaction and could potentially be used to engineer the band structure and the topology of solid-state systems. Here, the authors investigate coherent photoemission from a gold surf
Externí odkaz:
https://doaj.org/article/8fb2352a704a4ff5a003223647fc7f23
Autor:
Mario Hentschel, Kirill Koshelev, Florian Sterl, Steffen Both, Julian Karst, Lida Shamsafar, Thomas Weiss, Yuri Kivshar, Harald Giessen
Publikováno v:
Light: Science & Applications, Vol 12, Iss 1, Pp 1-12 (2023)
We demonstrate that voids in high-index dielectrics support localized resonant modes which are confined in air and thus do not suffer from the loss and dispersion of the host medium
Externí odkaz:
https://doaj.org/article/92766ace054d4b3ba05dc2a0a49bf28e
Autor:
Julian Karst, Yohan Lee, Moritz Floess, Monika Ubl, Sabine Ludwigs, Mario Hentschel, Harald Giessen
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
Future optical devices, e.g., for AR and VR, will require sophisticated flat metaoptics with unique optical functionalities. The authors demonstrate a metaobjective based on electrically switchable metallic polymer metalenses, whose optical states an
Externí odkaz:
https://doaj.org/article/29cc5a0b0d654d19a8f8c88e8f4ce60c
Autor:
Robin Lingstädt, Nahid Talebi, Mario Hentschel, Soudabeh Mashhadi, Bruno Gompf, Marko Burghard, Harald Giessen, Peter A. van Aken
Publikováno v:
Communications Materials, Vol 2, Iss 1, Pp 1-11 (2021)
Hyperbolic materials have unique optical properties such as negative refraction and highly directional polaritons, relevant in super-resolution imaging. Here, the topological insulator Bi2Se3 is shown to host hyperbolic edge-confined exciton polarito
Externí odkaz:
https://doaj.org/article/d23021e1df0d4e9c97fa09f976fce95a
Autor:
Nahid Talebi, Sophie Meuret, Surong Guo, Mario Hentschel, Albert Polman, Harald Giessen, Peter A. van Aken
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
There is growing interest in designing platforms for coherent electron-driven photon sources for hybrid light and electron spectroscopy. Here the authors demonstrate generation of coherent broadband ultrashort light pulses upon electron irradiation t
Externí odkaz:
https://doaj.org/article/7fe6b195a0dc4a3e841ebdd93a9a9015
Publikováno v:
Sensors, Vol 22, Iss 15, p 5567 (2022)
The detection and quantification of glucose concentrations in human blood or in the ocular fluid gain importance due to the increasing number of diabetes patients. A reliable determination of these low concentrations is hindered by the complex aqueou
Externí odkaz:
https://doaj.org/article/192c02ac72bd45e981e0cb08e164cb25
Autor:
Lucas Bremer, Ksenia Weber, Sarah Fischbach, Simon Thiele, Marco Schmidt, Arsenty Kaganskiy, Sven Rodt, Alois Herkommer, Marc Sartison, Simone Luca Portalupi, Peter Michler, Harald Giessen, Stephan Reitzenstein
Publikováno v:
APL Photonics, Vol 5, Iss 10, Pp 106101-106101-8 (2020)
User-friendly single-photon sources with high photon-extraction efficiency are crucial building blocks for photonic quantum applications. For many of these applications, such as long-distance quantum key distribution, the use of single-mode optical f
Externí odkaz:
https://doaj.org/article/ac5ab6cbde32447dabcc2da9000abc07