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Your search keyword '"Cadusch, Jasper J."' showing total 44 results
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44 results on '"Cadusch, Jasper J."'

1. Visible to long-wave infrared chip-scale spectrometers based on photodetectors with tailored responsivities and multispectral filters

Author

Cadusch Jasper J., Meng Jiajun, Craig Benjamin J., Shrestha Vivek Raj, and Crozier Kenneth B.

Subjects
lab on chip, microspectrometers, nanophotonics, spectrometers, Physics, QC1-999
Abstract

Chip-scale microspectrometers, operational across the visible to long-wave infrared spectral region will enable many remote sensing spectroscopy applications in a variety of fields including consumer electronics, process control in manufacturing, as well as environmental and agricultural monitoring. The low weight and small device footprint of such spectrometers could allow for integration into handheld, unattended vehicles or wearable-electronics based systems. This review will focus on recent developments in nanophotonic microspectrometer designs, which fall into two design categories: (i) planar filter-arrays used in conjunction with visible or IR detector arrays and (ii) microspectrometers using filter-free detector designs with tailored responsivities, where spectral filtering and photocurrent generation occur within the same nanostructure.

Published
2020
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35. Surface plasmon wave plates

Author

Djalalian-Assl, Amir, primary, Cadusch, Jasper J., additional, Teo, Zhi Qin, additional, Davis, Timothy J., additional, and Roberts, Ann, additional

Published
2015
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41. Tunable surface plasmon wave plates

Author

Djalalian-Assl, Amir, Cadusch, Jasper J., Balaur, Eugeniu, and Aramesh, Morteza

Abstract

The highest resonant transmission through an array of holes perforated in metallic screens occurs when the dielectric constant of the substrate, the superstrate, and the hole are the same. Changes in the refractive index of the homogenous environment also produce the largest shift in resonances per refractive index unit. In this Letter, we first propose and apply a technique in realization of a freestanding bi-periodic array of holes perforated in a silver film. We then show both numerically and experimentally that shifts in (1,0) and (0,1) modes in response to changes in the refractive index of the surrounding dielectric provide a mechanism for realization of a miniaturized tunable quarter-wave plate that operates in an extraordinary optical transmission mode with a high throughput and a near unity state of circularly polarized light.

Published
2016

42. Multifunctional Dielectric Metasurfaces Consisting of Color Holograms Encoded into Color Printed Images.

Author

Wen, Dandan, Cadusch, Jasper J., Meng, Jiajun, and Crozier, Kenneth B.

Subjects
*COLOR printing, *HOLOGRAPHY, *DIELECTRIC devices, *LASER beams, *DOCUMENT imaging systems, *BACK up systems, *DIELECTRICS
Abstract

A hologram records the wavefront of light from an object, but it is usually not an image itself, and looks unintelligible under diffuse ambient light. Here a new paradigm to encode a color hologram onto a color printed image is experimentally demonstrated. The printed image can be directly viewed under white light illumination, while a low‐crosstalk color holographic image can be seen when the device is illuminated with red (R), green (G), and blue (B) laser beams. The device is a dielectric metasurface that consists of titanium dioxide (TiO2) cones on a glass substrate. The dimensions of the TiO2 cones are chosen to allow them to support visible‐wavelength resonances, thereby producing the desired reflection spectra and thus the color printed image. The detour phase method is furthermore used to encode the hologram into the metasurface. The approach is conceptually different from previously demonstrated color printed images or holograms and presents opportunities for optical document security and data storage applications. [ABSTRACT FROM AUTHOR]

Published
2020
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