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Interdigitated terahertz metamaterial sensors:design with the dielectric perturbation theory

Photonics Research 2024年第6期12卷 1115-1128页

作者： LEI CAO FANQI MENG ESRAÖZDEMIR YANNIK LOTH MERLE RICHTER ANNA KATHARINA WIGGER MAIRA BEATRIZ PÉREZ SOSA ALAA JABBAR JUMAAH SHIHAB AL-DAFFAIE peter haring bolívar HARTMUT G.ROSKOS State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and TechnologyWuhan 430074China Physikalisches Institut Johann Wolfgang Goethe-UniversitätFrankfurt am MainGermany University of Siegen Institute for High Frequency and Quantum ElectronicsSiegenGermany Department of Electrical Engineering Eindhoven University of Technology5612 AE EindhovenThe Netherlands

Designing terahertz sensors for highly sensitive detection of nanoscale thin films and a few biomolecules poses a substantial challenge but is crucial for unlocking their full potential in scientific research and advanced *** work presents a strategy for optimizing metamaterial sensors in detecting small quantities of dielectric *** amount of frequency shift depends on intrinsic properties(electric field distribution,Q-factor,and mode volume)of the bare cavity as well as the overlap volume of its high-electric-field zone(s)and the *** by the simplified dielectric perturbation theory,interdigitated electric split-ring resonators(ID-eSRRs)are devised to significantly enhance the detection sensitivity compared with eSRRs without interdigitated ***-eSRR’s fin-gers redistribute the electric field,creating strongly localized enhancements,which boost analyte *** periodic change of the inherent antiphase electric field reduces radiation loss,leading to a higher *** with ID-eSRR sensors operating at around 300 GHz demonstrate a remarkable 33.5 GHz frequency shift upon depositing a 150 nm SiO_(2)layer as an analyte simulant,with a figure of merit improvement of over 50 times compared with structures without interdigitated *** rational design offers a promising avenue for highly sensitive detection of thin films and trace biomolecules.

关键词： dielectric perturbation theory

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High Responsivity and Ultra-Low Detection Limits in Nonlinear a-Si:H p-i-n Photodiodes Enabled by Photogating

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Photonic Sensors 2023年第4期13卷 27-38页

作者： Andreas BABLICH Maurice MÜLLER Rainer BORNEMANN Andreas NACHTIGAL peter haring bolívar Institute of Graphene-Based Nanotechnology University of SiegenHölderlinstr.357076 SiegenGermany Institute of High Frequency and Quantum Electronics University of SiegenHölderlinstr.357076 SiegenGermany

Photodetectors operating at the wavelength in the visible spectrum are key components in high-performance optoelectronic *** this work,massive nonlinearities in amorphous silicon p-i-n photodiodes enabled by the photogating are presented,resulting in responsivities up to 744 mA/W at blue *** detectors exhibit significant responsivity gains at optical modulation frequencies exceeding MHz and a more than 60-fold enhanced spectral response compared to the non-gated *** detection limits down to 10.4 nW/mm^(2) and mean signal-to-noise ratio enhancements of 8.5dB are demonstrated by illuminating the sensor with an additional 6.6μW/mm^(2) red ***-optical simulations verify photocarrier modulation due to defect-induced field screening to be the origin of such high responsivity *** experimental results validate the theory and enable the development of commercially viable and complementary metal oxide semiconductor(CMOS)compatible high responsivity photodetectors operating in the visible range for low-light level imaging and detection.

关键词： Photogating amorphous silicon a-Si:H nonlinearity photodetector responsivity gain

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Overview of clinical forensic services in various countries of the European Union

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Forensic Sciences Research 2020年第1期5卷 74-84页

作者： Sophie Kerbacher Michael Pfeifer Reingard Riener-Hofer Andrea Berzlanovich Maeve Eogan Anita Gali(c)Mihic Gregor haring Petr Hejna Johannes Höller Sorin Hostiuc Michael Klintschar peter Kovác Astrid Krauskopf Simone Leski Michal Malacka Thorsten Schwark Hanna Sprenger Andrea Verzeletti Duarte Nuno Vieira Sylvia Wolf Kathrin Yen Ludwig boltzmann Institute for Clinical Forensic Imaging Ludwig Boltzmann GesellschaftGrazAustria Center of Forensic Medicine Medical University of ViennaViennaAustria Department of Obstetricsand Gynaecology Rotunda HospitalDublinIreland Institute of Forensic Medicine and Criminalistics School of MedicineUniversity of ZagrebZagrebCroatia Department for Forensic Medicine and Deontology University of LjubljanaLjubljanaSlovenia Department of Forensic Medicine Charles University and University HospitalHradec KraloveCzech Republic Department of Legal Medicine National Institute of Legal MedicineBucharestRomania Department for Legal Medicine Hannover Medical SchoolHannoverGermany Forensic.sk Institút Forenznych Medicínskych ExpertízBratislavaSlovakia Institute of Forensic and Traffic Medicine University of HeidelbergHeidelbergGermany Faculty of Law Palacky University OlomoucOlomoucCzech Republic Department of Forensic Medicine Laboratoire National de SantéDudelangeLuxembourg Department of Medical and Surgical Specialties Radiological Sciences and Public HealthUniversity of BresciaBresciaItaly Department of Forensic Medicine Ethics and Medical LawFaculty of MedicineUniversity of CoimbraCoimbraPortugal

Examination of a person who has been a victim of a physical or sexual assault may be very important for upcoming legal *** the context of a clinical forensic examination,physical findings are recorded and biological trace material is gathered and ***,all forensic findings are documented in a detailed report combined with photographic docu-mentation,which employs a forensic scale to depict the size of the ***,the integrity of such forensic findings depends particularly on two ***,the examination needs to be conducted professionally to ensure that the findings are properly admissible as court ***,the examination should take place as soon as possible because the opportunity to successfully secure biological samples declines rapidly with *** to low-threshold clinical forensic examinations is not evenly provided in all member states of the European Union(EU);in some states,they are not available at *** part of the JUST_(e)U!(Juridical standards for clinical forensic examinations of victims of violence in Europe)pro-ject,the Ludwig boltzmann Institute for Clinical Forensic Imaging in Graz,Austria created(in cooperation with its international partner consortium)a questionnaire:the purpose was to collect information about support for victims of physical and/or sexual assault in obtaining a low-threshold clinical forensic examination in various countries of the *** paper pro-vides a summary of the responses and an overview of the current situation concerning pro-vided clinical forensic services.

关键词： Forensic sciences clinical forensic services violence JUST_(e)U! Directive 2012/29/EU victim examination

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