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Phase-sensitive plasmonic biosensor using a portable and large field-of-view interferometric microarray imager

Light(science & Applications) 2017年第1期6卷 159-167页

作者： Filiz Yesilkoy Roland A Terborg Josselin Pello alexander A Belushkin Yasaman Jahani Valerio Pruneri Hatice Altug Institute of BioEngineering École Polytechnique Fédérale de LausanneCH-1015 LausanneSwitzerland ICFO-Institut de Ciències Fotòniques The Barcelona Institute of Science and Technology08860 Castelldefels(Barcelona)Spain ICREA-InstitucióCatalana de Recerca i Estudis Avançats 08010 BarcelonaSpain

Nanophotonics,and more specifically plasmonics,provides a rich toolbox for biomolecular sensing,since the engineered metasurfaces can enhance light–matter interactions to unprecedented *** far,biosensing associated with high-quality factor plasmonic resonances has almost exclusively relied on detection of spectral shifts and their associated intensity ***,the phase response of the plasmonic resonances have rarely been exploited,mainly because this requires a more sophisticated optical *** we present a new phase-sensitive platform for high-throughput and label-free biosensing enhanced by *** employs specifically designed Au nanohole arrays and a large field-of-view interferometric lens-free imaging reader operating in a collinear optical path *** unique combination allows the detection of atomically thin(angstrom-level)topographical features over large areas,enabling simultaneous reading of thousands of microarray *** the plasmonic chips are fabricated using scalable techniques and the imaging reader is built with low-cost off-the-shelf consumer electronic and optical components,the proposed platform is ideal for point-of-care ultrasensitive biomarker detection from small sample *** research opens new horizons for on-site disease diagnostics and remote health monitoring.

关键词： interferometric imaging label-free plasmonic biosensors lens-free imaging phase interrogation point-of-care devices protein microarray detection

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Porphyrinic Acceptors forFullerene-Free MolecularPhotovoltaics

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CCs Chemistry 2024年第2期6卷 276-296页

作者： Jorge Labella Juan Laforga-Martin Tomás Torres Department of Organic Chemistry Universidad Aut´onoma de Madrid28049 Madrid Institute for Advanced Research in Chemical sciences Universidad Aut´onoma de MadridMadrid IMDEA—Nanociencia 28049 Madrid

Over the past few years,the development of nonfullerene acceptors(NFAs)has become a prominent focus in both organic and perovskite solar cell(OsCs and PsCs,respectively)research *** this context,porphyrinoids,compounds structurally related to porphyrins,have emerged as promising solar cell *** contrast to the widely used fullerene acceptors,porphyrinoids exhibit strong,broad absorption properties across the UV–vis/NIR spectrum,which can be easily tuned through chemical ***,they can be prepared and derivatized using cost-effective and straightforward methodologies,allowing for convenient adjustments in thin-film morphology,processability,supramolecular organization,and energy ***,these compounds offer higher thermal and photochemical stability,resulting in longer device lifetimes compared to their fullerene-based *** this review,we outline the utilization of porphyrinoids as NFAs in OsCs and PsCs,discussing essential aspects such as design guidelines,molecular properties,and device *** goal is to inspire and further promote the development of n-type porphyrinoids,which have not yet fully unleashed their potential.

关键词： fullerene-free molecular photovoltaics nonfullerene acceptors porphyrinic acceptors n-type porphyrinoids organic and perovskite solar cells

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Milliwatt terahertz harmonic generation from topological insulator metamaterials

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Light(science & Applications) 2022年第11期11卷 2766-2773页

作者： Klaas-Jan Tielrooij Alessandro Principi David saleta Reig alexander Block sebin Varghese steffen schreyeck Karl Brunner Grzegorz Karczewski Igor Ilyakov Oleksiy Ponomaryov Thales V.A.G.de Oliveira Min Chen Jan-Christoph Deinert Carmen Gomez Carbonell sergio O.Valenzuela Laurens W.Molenkamp Tobias Kiessling Georgy V.Astakhov sergey Kovalev Catalan Institute of Nanoscience and Nanotechnology(ICN2) BIST and CSICCampus UABBellaterraBarcelona 08193Spain Department of Applied Physics TU EindhovenDen Dolech 25612 AZ EindhovenThe Netherlands school of Physics and Astronomy University of ManchesterM139PL ManchesterUK Physikalisches Institut(EP3) Universitat WurzburgAm Hubland97074 WurzburgGermany Institute of Physics Polish Academy of ScienceAl.Lotnikow 32/46PL-02668 WarsawPoland Helmholtz Zentrum Dresden-Rossendorf Bautzner Landstr.40001328 DresdenGermany ICREA Pg.Lluis Companys 2308010 BarcelonaSpain Institute for Topological Insulators Am HublandD-97074 WurzburgGermany

Achieving effcient,high-power harmonic generation in the terahertz spectral domain has technological applications,for example,in sixth generation(6G)communication *** Dirac fermions possess extremely large terahertz nonlinear susceptibilities and harmonic conversion ***,the observed maximum generated harmonic power is limited,because of saturation effects at increasing incident powers,as shown recently for ***,we demonstrate room-temperature terahertz harmonic generation in a Bi_(2)se_(3) topological insulator and topological-insulator-grating metamaterial structures with surface-selective terahertz field *** obtain a third-harmonic power approaching the miliwatt range for an incident power of 75 mW-an improvement by two orders of magnitude compared to a benchmarked graphene *** establish a framework in which this exceptional performance is the result of thermodynamic harmonic generation by the massless topological surface states,benefiting from ultrafast dissipation of electronic heat via surface-bulk Coulomb *** results are an important step towards on-chip terahertz(opto)electronic applications.

关键词： harmonic insulator incident

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