Narrowband detection is of urgent demand in many fields, such as machine vision, biofluorescence imaging, artificial intelligence, flame, or gas molecule monitoring. However, the restricted recognition area and complex integration hinder development narrowband photodetectors. Due to excellent photoconversion efficiency, metal halide perovskites are emerging a new star field high-performance In ...

AbstractIntroductionPrincipleResultsDiscussionMethodsReferencesAcknowledgements Author informationSupplementary information ● Email ● Download PDF ● Download citation ● Order reprints ● Rights and permissions ● Share/bookmark Label-free microscopy that has chemical contrast and high acquisition speeds up to video rates has recently been made possible using stimulated Raman scattering (SRS) micr...

Stimulated Raman scattering (SRS) microscopy allows label-free chemical imaging based on vibrational spectroscopy. Narrowband excitation with picosecond lasers creates the highest signal levels and enables imaging speeds up to video-rate, but it sacrifices chemical specificity in samples with overlapping bands compared to broadband (multiplex) excitation. We develop a rapidly tunable picosecond...

during the last two decades, maximum likelihood estimation (ml) has been used to determine direction of arrival (doa) and signals propagated by the sources, using narrowband array signals. the algorithm fails in the case of wideband signals. as an attempt by the present study to overcome the problem, the array outputs are transformed into narrowband frequency bins, using short time fourier tran...

We consider imaging strategies for synthetic aperture radar data collections that span a wide angular aperture. Most traditional radar imaging techniques are predicated on the assumption of isotropic point scattering mechanisms, which does not hold for wide apertures. We investigate point scattering center images for narrowband, wide angle data, and consider the effect of limited persistence on...

We present results from a survey for z ∼ 2.85 Lyman-Continuum (LyC) emission in the HS1549+1933 field and place constraints on the amount of ionizing radiation escaping from starforming galaxies. Using a custom narrowband filter (NB3420) tuned to wavelengths just below the Lyman limit at z ≥ 2.82, we probe the LyC spectral region of 49 Lyman break galaxies (LBGs) and 91 Lyα-emitters (LAEs) spec...