Fabrication of a CMOS-based Imaging Chip with Monolithically Integrated RGB and NIR Filters

Vereecke, Bart; Besien, Els Van; Tezcan, Deniz Sabuncuoglu; Spooren, Nick; Tack, Nicolaas; Lambrechts, Andy

doi:10.3390/proceedings2130751

Cited by 3 publications

(2 citation statements)

References 4 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Key to this design is the MIM analyzer grating. As opposed to plasmonic hole and nanodisk array filters 31 – 34 , these MIM structures do not depend on spatial periodicity and thus can be laterally patterned on the wavelength scale. We begin with two MIM filters, green and red bandpass filters designed with HfO 2 dielectric thicknesses of d 1 = 70 nm and d 2 = 100 nm, respectively, sandwiched between two 30 nm thick silver layers (Fig.…”

Section: Resultsmentioning

confidence: 99%

Toward implantable devices for angle-sensitive, lens-less, multifluorescent, single-photon lifetime imaging in the brain using Fabry–Perot and absorptive color filters

et al. 2022

View full text Add to dashboard Cite

Implantable image sensors have the potential to revolutionize neuroscience. Due to their small form factor requirements; however, conventional filters and optics cannot be implemented. These limitations obstruct high-resolution imaging of large neural densities. Recent advances in angle-sensitive image sensors and single-photon avalanche diodes have provided a path toward ultrathin lens-less fluorescence imaging, enabling plenoptic sensing by extending sensing capabilities to include photon arrival time and incident angle, thereby providing the opportunity for separability of fluorescence point sources within the context of light-field microscopy (LFM). However, the addition of spectral sensitivity to angle-sensitive LFM reduces imager resolution because each wavelength requires a separate pixel subset. Here, we present a 1024-pixel, 50 µm thick implantable shank-based neural imager with color-filter-grating-based angle-sensitive pixels. This angular-spectral sensitive front end combines a metal–insulator–metal (MIM) Fabry–Perot color filter and diffractive optics to produce the measurement of orthogonal light-field information from two distinct colors within a single photodetector. The result is the ability to add independent color sensing to LFM while doubling the effective pixel density. The implantable imager combines angular-spectral and temporal information to demix and localize multispectral fluorescent targets. In this initial prototype, this is demonstrated with 45 μm diameter fluorescently labeled beads in scattering medium. Fluorescent lifetime imaging is exploited to further aid source separation, in addition to detecting pH through lifetime changes in fluorescent dyes. While these initial fluorescent targets are considerably brighter than fluorescently labeled neurons, further improvements will allow the application of these techniques to in-vivo multifluorescent structural and functional neural imaging.

show abstract

Section: Resultsmentioning

confidence: 99%

Toward implantable devices for angle-sensitive, lens-less, multifluorescent, single-photon lifetime imaging in the brain using Fabry–Perot and absorptive color filters

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Vereecke et al. 82 fabricated compact and low-cost spectral sensors by integrating filters on a single chip based on commercially available image sensors (CMOS and CCD). They described the production of RGB and NIR change maps for such a single-chip imaging system.…”

Section: Advanced Techniques For Spectrometer Miniaturizationmentioning

confidence: 99%

Review of portable near infrared spectrometers: Current status and new techniques

Zhu

Zhang

et al. 2022

Journal of Near Infrared Spectroscopy

View full text Add to dashboard Cite

Near infrared (NIR) spectroscopy is a non-destructive detection technology involving NIR spectral data acquisition and chemometric treatment. The use of an NIR spectrometer is evidently crucial in this regard; however, traditional benchtop NIR spectrometers considerably limit usage scenarios. Accordingly, the miniaturization of spectrometers with high level performance has become a research trend. Various commercial products have been developed, and new techniques have been applied to produce more portable NIR spectrometers. This paper reviews the main types of commercial portable NIR spectrometers and summarizes as well as compares their specifications. Moreover, new techniques for promoting miniaturization and the prospects for future development are introduced.

show abstract

Monolithically integrated optical interference and absorption filters on thin film amorphous silicon photosensors for biological detection

Nikolaidou

Condelipes

Caneira

et al. 2022

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Fabrication of a CMOS-based Imaging Chip with Monolithically Integrated RGB and NIR Filters

Cited by 3 publications

References 4 publications

Toward implantable devices for angle-sensitive, lens-less, multifluorescent, single-photon lifetime imaging in the brain using Fabry–Perot and absorptive color filters

Toward implantable devices for angle-sensitive, lens-less, multifluorescent, single-photon lifetime imaging in the brain using Fabry–Perot and absorptive color filters

Review of portable near infrared spectrometers: Current status and new techniques

Monolithically integrated optical interference and absorption filters on thin film amorphous silicon photosensors for biological detection

Contact Info

Product

Resources

About