We describe a reflection scheme that allows Bragg-spaced semiconductor quantum wells to be used to trap, store, and release light. We study the temporal and spectral distortion of delayed light pulses and show that this geometry allows multibit delays and offers a high degree of distortion compensation.
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Integrated Active Quenching Circuit for high-rate and distortionless SPAD-based time-resolved fluorescence applications.
IEEE Trans Biomed Circuits Syst
August 2024
Time-Correlated Single Photon Counting (TCSPC) is a pivotal technique in low-light-detection applications, renowned for its exceptional sensitivity and bandwidth, widely used in Fluorescence Lifetime Imaging Microscopy (FLIM) and quantum optics. Despite its features, TCSPC is significantly hindered by the pile-up effect, which may distort measurements at high photon-detection rates. Overcoming pile-up is challenging, with traditional solutions often involving complex post-processing or multichannel systems, complicating the TCSPC setup and limiting performance.
View Article and Find Full Text PDFBrønsted acid-induced transannulation of the phytochemical zerumbone.
Org Biomol Chem
December 2021
Major in Advanced Bioscience, Graduate School of Agriculture, Kindai University, Nara, Nara 631-8505, Japan.
The sesquiterpene zerumbone was treated with HCl in ethyl acetate under the light-protected condition, and the time-dependent conversions were analyzed by gas chromatography. Nine products were isolated, and their structures were revealed by several NMR measurements such as H NMR, C{H} NMR, distortionless enhancement by polarization transfer (DEPT)-135, H-H correlation spectroscopy (COSY), H-C heteronuclear multiple quantum coherence (HMQC), and H-C heteronuclear multiple bond coherence (HMBC). The X-ray crystallography determined the stereochemistries of the three products and the two derivatives.
View Article and Find Full Text PDFInhibitory role of a smart nano-trifattyglyceride of root in epithelial ovarian cancer, through attenuation of FSHR - c-Myc axis.
J Tradit Complement Med
November 2021
Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India.
Background And Aim: Epithelial ovarian cancer has the deadliest prognosis amongst gynaecological cancers, warranting an unmet need for newer drug targets. Based on its anticancer as well as abortifacient potential, Lam. root was hypothesized to have some implications in follicle stimulating hormone receptor (FSHR) dependent cancers like epithelial ovarian cancer.
View Article and Find Full Text PDFGraphene Nanoribbon Gap Waveguides for Dispersionless and Low-Loss Propagation with Deep-Subwavelength Confinement.
Nanomaterials (Basel)
May 2021
Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Surface plasmon polaritons (SPPs) have been attracting considerable attention owing to their unique capabilities of manipulating light. However, the intractable dispersion and high loss are two major obstacles for attaining high-performance plasmonic devices. Here, a graphene nanoribbon gap waveguide (GNRGW) is proposed for guiding dispersionless gap SPPs (GSPPs) with deep-subwavelength confinement and low loss.
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