- School of Physics - Research Publications
School of Physics - Research Publications
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ItemNanostructured Fishnet Silicon Photodetector Pixels as a Fully-Contained Microspectrometer ChipCadusch, JJ ; Meng, J ; Crozier, KB (IEEE, 2018)We experimentally demonstrate a microspectrometer comprising twenty silicon photodetector pixels, whose responsivities are engineered via nanostructured fishnet patterns. We computationally reconstruct the spectrum of light that illuminates the chip from the measured pixel photocurrents.
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ItemDielectric metasurface comprising color hologram encoded into a color printing imageWen, D ; Cadusch, J ; Meng, J ; Crozier, KB (IEEE, 2019-01-01)
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ItemHigh-resolution mid-infrared spectral reconstruction using a subwavelength coaxial aperture arrayCraig, B ; Meng, J ; Shrestha, VR ; Cadusch, JJ ; Crozier, KB (OSA & IEEE, 2019-01-01)We demonstrate mid-infrared computational spectroscopy using an array of coaxial aperture filters. We experimentally determine material transmission spectra using an algorithm whose inputs are the transmission spectra and the power transmitted through each filter.
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ItemNanostructured all-Silicon Photodetector Pixels with Tailored Responsivity SpectraCadusch, JJ ; Meng, J ; Crozier, KB ; Mitchell, A ; RubinszteinDunlop, H (SPIE-INT SOC OPTICAL ENGINEERING, 2019)We experimentally demonstrate nanostructured silicon photodetectors which consist of subwavelength arrays of verticallyoriented waveguides etched into a P-I-N photodiode. Our device combines both spectral-filtering and photocurrentgeneration in one all-Si structure. We show that absorption and responsivity spectra of these nanophotonic devices can be tuned by appropriate geometric design.
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ItemVertically stacked silicon nanowire photodetectors for spectral reconstructionMeng, J ; Cadusch, JJ ; Crozier, KB (OSA & IEEE, 2019-01-01)We experimentally demonstrate the use of vertically stacked silicon nanowire photodetectors for computational spectral reconstruction at visible wavelengths. The method is based on the photodetectors having tailored responsivity spectra, achieved by standard nanofabrication processes.
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ItemVertical waveguide arrays as wavelength selective nanostructured silicon photodetector pixelsCadusch, JJ ; Meng, J ; Crozier, KB (OSA, 2019)We experimentally demonstrate a nanostructured silicon photodetector that consists of subwavelength arrays of vertical waveguides. Our device combines spectral-filtering and photocurrent-generation. We show that absorption and responsivity spectra can be tuned by appropriate design.
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ItemAlgorithmic Spectral Reconstruction Using Angularly Tuned Zero-Contrast GratingsRussell, B ; Meng, J ; Wen, D ; Cadusch, J ; Ye, M ; Crozier, K (IEEE, 2020)We experimentally demonstrate the algorithmic reconstruction of the infrared transmission spectrum of a polymer using a zero-contrast waveguide-grating metasurface as a filter. By changing the metasurface angle, a variety of filter functions are obtained.
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ItemGeometric Phase Metasurface Hologram for Optical Tractor Beam GenerationCadusch, J ; Wen, D ; Meng, J ; Crozier, KB (OSA & IEEE, 2020-01-01)We present a geometric phase silicon metasurface hologram design intended to produce a non-diffracting solenoid beam. Such optical beams have been shown to exert long range retrograde (i.e. toward source) optical forces on light-scattering particles.
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ItemPolarization State Generation and Detection by VCSELs with Integrated MetasurfacesWen, D ; Meng, J ; Cadusch, J ; Crozier, KB (OSA & IEEE, 2020-01-01)We experimentally demonstrate vertical-cavity surface-emitting lasers (VCSEL) with integrated plasmonic and dielectric metasurfaces. The metasurfaces shape the polarization of the laser emission from the VCSELs and also enable them to serve as polarization-dependent photodetectors.
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ItemMaterial identification with a filter array-detector array infrared microspectrometer: Numerical studyMeng, J ; Cadusch, JJ ; Crozier, KB (Optica Publishing Group, 2020-09-14)We design a plasmonic filter array for a filter array-detector array microspectrometer. We perform numerical experiments, including noise, that predict that this configuration would enable the identification of various materials via their infrared fingerprints.