- School of Physics - Research Publications
School of Physics - Research Publications
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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.
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ItemAll-silicon, optics-free microspectromer chip based on vertical waveguide array pixelsCadusch, JJ ; Meng, J ; Wen, D ; Crozier, KB (OSA & IEEE, 2021-01-01)We experimentally demonstrate a nanostructured silicon microspectrometer chip that consists of 144 pixels, each comprising an array of vertical waveguides of subwavelength period. We show that both broad- and narrow-band visible spectra can be reconstructed.
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ItemMaterial identification by plasmonic infrared microspectrometer employing machine learningMeng, J ; Weston, L ; Balendhran, S ; Wen, D ; Cadusch, JJ ; Unnithan, RR ; Crozier, KB (Optica Publishing Group, 2021-01-01)We demonstrate a microspectrometer comprising plasmonic filters integrated with an infrared camera. Blackbody light illuminates the material being studied, with transmitted light collected by the microspectrometer. The latter uses machine learning to identify the material.
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ItemTriple-helix tractor beam generation with a dielectric metasurface pancharatnam-berry phase hologramCadusch, J ; Wen, D ; Meng, J ; Crozier, KB (Optica Publishing Group, 2021-01-01)We present a silicon-based Pancharatnam-Berry (PB) phase metasurface hologram that produces a triple-helix solenoid tractor beam from a Gaussian input beam. Our metasurface has a >90% diffraction efficiency and >75% transmission.