21 papers · ranked by Valyu relevance
Jian Ge, Zhangqi Dang, Ziru Zhang, Chenxu Gao + 14 more
Answering the question "Are we alone?" requires atmospheric spectroscopy of nearby terrestrial planets. For an Earth--Sun analog, even the strongest transmission signals are expected to be of order 1 part per million (ppm). Unlike short-period planets, Earth 2.0 planets transit only about once per year, so…
M. Dolores Perez, Pradip Gatkine, Nemanja Jovanović, Jeffrey Jewell + 2 more
'J. Kent Wallace' 'Dimitri Mawet'] Photonic spectrographs offer a highly miniaturized, flexible, and stable on-chip solution for astronomical spectroscopy and can be used for various science cases such as determining the atmospheric composition of exoplanets to understand their habitability, formation, and evolution.…
Martin M. Roth, Kalaga Madhav, Andreas Stoll, Daniel Bodenmueller + 5 more
'Aline N. Dinkelaker' 'Aashia Rahman' 'Eloy Hernandez' 'Alan M. Guenther' 'Stella Vjes̆nica'] Photonic Integrated Circuits (PIC) are best known for their important role in the telecommunication sector, e.g. high speed communication devices in data centers. However, PIC also hold the promise for innovation in sectors…
Markus Ludwig, Furkan Ayhan, Tobias M. Schmidt, Thibault Wildi + 17 more
'Thibault Voumard' 'Roman Blum' 'Zhichao Ye' 'Fuchuan Lei' 'F. Wildi' 'F. Pepe' 'Mahmoud Gaafar' 'Ewelina Obrzud' 'Davide Grassani' 'F. Moreau' 'Bruno Chazelas' 'R. Sottile' 'Víctor Torres–Company' 'Victor Brasch' 'Luis Guillermo Villanueva' 'F. Bouchy' 'Tobias Herr'] Astronomical precision spectroscopy underpins…
Markus Ludwig, Furkan Ayhan, Tobias M. Schmidt, Thibault Wildi + 20 more
'Thibault Voumard' 'Roman Blum' 'Zhichao Ye' 'Fuchuan Lei' 'François Wildi' 'Francesco Pepe' 'Mahmoud A. Gaafar' 'Ewelina Obrzud' 'Davide Grassani' 'Olivia Hefti' 'Sylvain Karlen' 'Steve Lecomte' 'François Moreau' 'Bruno Chazelas' 'Rico Sottile' 'Victor Torres-Company' 'Victor Brasch' 'Luis G. Villanueva' 'François…
Jeronimo Calderon-Gomez, Frantz Martinache, Nick Cvetojevic, Marc-Antoine Martinod + 13 more
Astrophotonics is a field that intends to meet the needs of next-generation instruments at a small footprint, low cost, and high stability, compared to bulk-optics-based alternatives. Much development effort is driven by the stringent requirements of direct detection and characterization of exoplanets. Our team works…
Yuk Shan Cheng, Kamalesh Dadi, Toby Mitchell, Samantha Thompson + 5 more
Cosmological and exoplanetary science using transformative telescopes like the ELT will demand precise calibration of astrophysical spectrographs in the blue-green, where stellar absorption lines are most abundant. Astrocombs-lasers providing a broadband sequence of regularly-spaced optical frequencies on a multi-GHz…
Henock D. Yallew, Marek Vlk, Anurup Datta, Sebastian Alberti + 4 more
Detection with Mid-Infrared Slot Waveguides Authors: ['Henock D. Yallew' 'Marek Vlk' 'Anurup Datta' 'Sebastian Alberti' 'Roman A. Zakoldaev' 'Jens Høvik' 'Astrid Aksnes' 'Jana Jágerská'] Hybrid integration of photonic chips with electronic and micromechanical circuits is projected to bring about miniature, but still…
J. Schou
Context. One of the main methods used for finding extrasolar planets is the radial velocity technique, in which the Doppler shift of a star due to an orbiting planet is measured. These measurements are typically performed using cross-dispersed echelle spectrographs. Unfortunately such spectrographs are large and…
Pattarapong Sunongbua, Suwan Aekram, Weerasak Lertsiriyothin, Kenneth Schepler + 1 more
'Kenneth Schepler' 'Ajoy Kar'] To make the mid-infrared (MIR) dispersive spectrograph a practical tool in industrial food processing lines, we designed a dispersive spectrograph system with an uncooled microbolometer focal plane array (FPA) detector for MIR spectral acquisition. To precisely regulate the angle of a…
Christian Helke, Markus Reinhardt, Markus Arnold, Falk Schwenzer + 12 more
'Micha Haase' 'Matthias Wachs' 'Christian Goßler' 'Jonathan Götz' 'Daniel Keppeler' 'Bettina Wolf' 'Jannis Schaeper' 'Tim Salditt' 'Tobias Moser' 'Ulrich Theodor Schwarz' 'Danny Reuter' 'JaeJong Lee'] Improved hearing restoration by cochlear implants (CI) is expected by optical cochlear implants (oCI) exciting…
Authors not listed
Phase change materials (PCMs) with distinct optical properties at different phases are promising candidates for programmable photonics, optical communication and photonic computing. In this work, we have studied thermo-optic effect in a PCM-based integrated photonic device comprising a film of bistable [Fe2Co2]…
Anders Kokkvoll Engdahl, Surjendu Bikash Dutta, Stefan Belle, Jasmin Schürstedt + 5 more
Photonic waveguide chips offer near-field excitation of biological samples, which enables cost-effective, large field-of-view super-resolution microscopy without the need for high numerical aperture (NA) objective lenses. Single molecule localization based super-resolution microscopy that requires high illumination…
Michael Sabatini Mattei, Boyuan Liu, Gerardo A. Mazzei Capote, Zijie Liu + 3 more
Photonic topological insulators have emerged as an exciting new platform for backscatter-free waveguiding even in the presence of defects, with applications in robust long-range energy and quantum information transfer, low-threshold lasing, and chiral quantum optics. We demonstrate a design for spin-Hall photonic…
Andreas Christ, Adrian Aeschbacher, Bernadetta Tarigan, Ninad Chitnis + 4 more
In the recently revised guidelines for electromagnetic safety, basic restrictions expressed in terms of the absorbed power density (APD) at frequencies higher than 6 GHz were introduced. Testing for APD compliance of wireless devices requires experimental and numerical body models or phantoms that conservatively…
Shomik Verma, Daniel Farrell, Rachel Evans
Luminescent solar concentrators (LSCs) are a promising technology to help integrate solar cells into the built environment, as they are colorful, semi-transparent, and can collect diffuse light. While LSCs have traditionally been cuboidal, in recent years a variety of unconventional geometries have arisen, for example…
Phillip J. Dorsey, Dominic Scalise, Rebecca Schulman
In multicellular organisms, cells and tissues coordinate biochemical signal propagation across length scales spanning microns to meters. Endowing synthetic materials with similar capacities for coordinated signal propagation could allow these systems to adaptively regulate themselves across space and over time. Here we…
Yuntian Wang, Yuhang Li, Tianyi Gan, Kun Liao + 2 more
'Aydogan Ozcan'] We introduce universal diffractive waveguide designs that can match the performance of conventional dielectric waveguides and achieve various functionalities. Optimized using deep learning, diffractive waveguides can be cascaded to form any desired length and are comprised of transmissive diffractive…
Anna Lena Schäfer, Cristina Gellini, Rolf Diller, Katrina T. Forest + 2 more
Time-resolved resonance Raman spectroscopy with continuous-wave excitation is a fundamental technique that has contributed substantially to the understanding of structure and dynamics of bacteriorhodopsin and related retinal proteins. However, the underlying principles were developed about fifty years ago for…
Georg Ramer, Ufuk Yilmaz, Savda Sam, Bernhard Lendl
We demonstrate a novel approach for bottom-illuminated atomic force microscopy infrared spectroscopy (AFM-IR). This nearfield technique is suitable for AFM-IR measurements in liquids, taking advantage of an attenuated total reflection (ATR) setup where the developing evanescent wave is used for photothermal excitation…
H. Liu, S. Kumar, E. Garcia, P.M.W. French
Spectrally resolved imaging is typically realised using bandpass filters, which are inefficient when they reject “out-of-band” photons or using angularly dispersive devices with at least one image dimension requiring scanning to acquire a full hyperspectral dataset and therefore sequential data acquisition, unless…