An aquatic-vision-inspired camera based on a monocentric lens and a silicon nanorod photodiode array

Kim, Min Soo; Lee, Gil Ju; Choi, Changsoon; Kim, Min Seok; Lee, Min-Cheol; Liu, Siyi; Cho, Kyoung Won; Kim, Hyun Myung; Cho, Hyojin; Choi, Moon Kee; Lu, Nanshu; Song, Young Min; Kim, Dae‐Hyeong

doi:10.1038/s41928-020-0429-5

Cited by 105 publications

(71 citation statements)

References 44 publications

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“…In case of a conventional imaging system with a conventional processor (i.e., von-Neumann architecture; Fig. 1c top), a flat image sensor array responds to incoming light (i.e., optical inputs) focused by multi-lens optics 10 and generates a photocurrent proportional to the intensity of applied optical inputs 23 , 24 . All measurements by the image sensor should be converted into digital signals and stored in a memory device for frame-based image acquisition 25 .…”

Section: Resultsmentioning

confidence: 99%

Curved neuromorphic image sensor array using a MoS2-organic heterostructure inspired by the human visual recognition system

et al. 2020

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Conventional imaging and recognition systems require an extensive amount of data storage, pre-processing, and chip-to-chip communications as well as aberration-proof light focusing with multiple lenses for recognizing an object from massive optical inputs. This is because separate chips (i.e., flat image sensor array, memory device, and CPU) in conjunction with complicated optics should capture, store, and process massive image information independently. In contrast, human vision employs a highly efficient imaging and recognition process. Here, inspired by the human visual recognition system, we present a novel imaging device for efficient image acquisition and data pre-processing by conferring the neuromorphic data processing function on a curved image sensor array. The curved neuromorphic image sensor array is based on a heterostructure of MoS2 and poly(1,3,5-trimethyl-1,3,5-trivinyl cyclotrisiloxane). The curved neuromorphic image sensor array features photon-triggered synaptic plasticity owing to its quasi-linear time-dependent photocurrent generation and prolonged photocurrent decay, originated from charge trapping in the MoS2-organic vertical stack. The curved neuromorphic image sensor array integrated with a plano-convex lens derives a pre-processed image from a set of noisy optical inputs without redundant data storage, processing, and communications as well as without complex optics. The proposed imaging device can substantially improve efficiency of the image acquisition and recognition process, a step forward to the next generation machine vision.

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Section: Resultsmentioning

confidence: 99%

Curved neuromorphic image sensor array using a MoS2-organic heterostructure inspired by the human visual recognition system

et al. 2020

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“…To mimic the human retina, various researches were proposed in different fields [115][116][117]. Likewise, vertical nanowire arrays have been considered as an alternative way to demonstrate the artificial retina [118][119][120]. Gu et al successfully implemented the biomimetic visual system, which has nearly perfect hemispherical retina with high-density artificial photoreceptors using perovskite nanowires inside of a curved porous aluminum oxide membrane (PAM) [121].…”

Section: Artificial Retinamentioning

confidence: 99%

Recent Advances in Vertically Aligned Nanowires for Photonics Applications

2020

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Over the past few decades, nanowires have arisen as a centerpiece in various fields of application from electronics to photonics, and, recently, even in bio-devices. Vertically aligned nanowires are a particularly decent example of commercially manufacturable nanostructures with regard to its packing fraction and matured fabrication techniques, which is promising for mass-production and low fabrication cost. Here, we track recent advances in vertically aligned nanowires focused in the area of photonics applications. Begin with the core optical properties in nanowires, this review mainly highlights the photonics applications such as light-emitting diodes, lasers, spectral filters, structural coloration and artificial retina using vertically aligned nanowires with the essential fabrication methods based on top-down and bottom-up approaches. Finally, the remaining challenges will be briefly discussed to provide future directions.

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“…[ 37–39 ] For example, compared to the planar form sensors, the lens‐shaped vision sensors can provide several advantages, such as a wider field of view, a more homogeneous quality of the image, and reduced distortion. [ 40–43 ] As an example for their potential use as image sensors, we demonstrated the formation of a soft smart contact lens in which the fully integrated array of perovskite photodetectors was embedded ( Figure a). In this approach, an integrated array of MAPbI 3− x Cl x photodetectors was fabricated using the aforementioned process.…”

Section: Resultsmentioning

confidence: 99%

3D Heterogeneous Device Arrays for Multiplexed Sensing Platforms Using Transfer of Perovskites

et al. 2021

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An aquatic-vision-inspired camera based on a monocentric lens and a silicon nanorod photodiode array

Cited by 105 publications

References 44 publications

Curved neuromorphic image sensor array using a MoS2-organic heterostructure inspired by the human visual recognition system

Curved neuromorphic image sensor array using a MoS2-organic heterostructure inspired by the human visual recognition system

Recent Advances in Vertically Aligned Nanowires for Photonics Applications

3D Heterogeneous Device Arrays for Multiplexed Sensing Platforms Using Transfer of Perovskites

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