High-performance nonscanning Fourier-transform spectrometer that uses a Wollaston prism array

Komisarek, Dan; Reichard, Karl; Merdes, Daniel W.; Lysak, Dan; Lam, Philip; Wu, Shudong; Yin, Shizhuo

doi:10.1364/ao.43.003983

Cited by 22 publications

(13 citation statements)

References 8 publications

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“…To parse spectrum, two strategies are available. One is the optical solution which includes: 1) using color filter or stacked absorption layers to construct laminated device,2–4 2) choosing narrowband absorption semiconductor as absorber,5 3) using optical interference or plasmonic effect to enhance responsivity of the chosen wavelength,6,7 4) using prism and mechanical system to parse spectrum 8. The other is electronic solution which mainly relies on charge collection narrowing that is enabled by controlling surface recombination or self‐trapped states 9–11.…”

Section: Figurementioning

confidence: 99%

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

et al. 2020

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Integration of various photodetectors with different light‐sensitive materials and detection capacity is an inevitable way to achieve entire color/spectrum detection. However, the uneven capacity of each photodetector would drag the overall performance behind, especially the response speed. A response time down to nanosecond level has not previously been reported for a filter‐free color/spectrum‐sensitive photodetector, as far as is known. Here, a self‐powered filterless color‐sensitive photodetection array based on an in situ formed gradient perovskite absorber film with continuously tunable bandgap is demonstrated. Ultrahigh‐speed response at nanosecond level is achieved in all the ingredient photodetectors. The junction capacitance being influenced by carrier concentration in the absorber is identified to be responsible for the detection speed. Without any optic or mechanical supporting system, the designed color detector exhibits an external quantum efficiency (EQE) up to 94% and a high spectral resolution of around 80 nm for the whole visible spectrum. This work offers a guidance to achieve fast response of perovskite‐based photodetectors from the point of view of carrier‐donor control and demonstrates a new avenue to establish color‐sensitive photodetectors/spectrometers.

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Section: Figurementioning

confidence: 99%

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

et al. 2020

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“…[ 1–6 ] For example, the bionic eyes simulate the composition and function of the human retina, which contains about 100–120 million visual cells with a density of around 0.1 cell µm ‐2 , [ 7 ] proposing the requirement for high imaging resolution of full‐color image sensors. However, traditional image detection systems and most of the recently reported works have to integrate color filters, [ 8–11 ] prisms, [ 12 ] or optical microcavities, [ 13,14 ] which limits the pixel density and flexible application scenarios, and merely responds to specific wavelength range meanwhile loses some spectral information. Consequently, the most ideal way is combining various multispectral, tiny, and high‐performance semiconductors on the same substrate to reconstruct precise monochromatic or broadband spectral.…”

Section: Introductionmentioning

confidence: 99%

High‐Resolution, Flexible, and Full‐Color Perovskite Image Photodetector via Electrohydrodynamic Printing of Ionic‐Liquid‐Based Ink

Wang

Zhang

et al. 2021

Adv Funct Materials

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Direct full‐color image photodetectors without dichroic prisms or sophisticated color filters have considerable advantages in target recognition and information acquisition for electronic eyes and wearable sensors. However, the ability to combine various multispectral semiconductors in a high‐resolution and cost‐effective manner is still challenging. Here, high‐resolution electrohydrodynamic (EHD) printing, together with ionic liquid methylammonium acetate (MAAc) as the solvent, is first introduced to directly integrate various spectral‐response perovskite films into a pixelized full‐color photodetector. EHD printing enables micro/nanopatterning by using high electrical force to induce jetting, and MAAc improves film quality with scant pinholes and large‐size grains by decreasing the perovskite growth rate. By optimizing the printing process and crystallization condition, 1 µm perovskite dot arrays are EHD printed; this is, to the best of knowledge, the smallest printed feature size of perovskite application. And the photodetector still achieves high R and D* values of 14.97 A W‐1 and 1.41 × 1012 Jones, respectively. Finally, an integrated flexible full‐color image photodetector is constructed, which successfully realizes light signal detection and color recognition, paving a versatile and competitive approach for future full‐color image sensors and artificial vision systems.

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“…A liquid crystal (LC) is a good birefringent material because of its large tunable refractive index, low driven voltage, and fast response, all of which have been widely researched in birefringent FTS. [8][9][10][11][12][13][14][15] The primary methods of LC birefringent FTS are based on a Wollaston prism with spatial interference 8-10 and a binary voltage-controlled LC stages with time interference. [11][12][13][14][15] For the spatial interference, the fringes are recorded by a detector array, which may increase the error due to the noise difference of the subdetectors.…”

Section: Introductionmentioning

confidence: 99%

Method of realizing compact Fourier transform spectrometer without moving parts based on birefringent liquid crystal

et al. 2014

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A method of realizing a compact Fourier transform spectrometer is proposed in this work, which is based on the polarization interference in a single layer of birefringent liquid crystal (BLC). The continuous interference between the ordinary light and the extraordinary light is driven by a continuously adjusted electric field. Benefiting from the single-layer configuration with no moving parts, the spectrometer is easily miniaturized. The method to realize the spectrometer is theoretically analyzed and experimentally demonstrated by a layer of nematic BLC with a 100-μm thickness.

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High-performance nonscanning Fourier-transform spectrometer that uses a Wollaston prism array

Cited by 22 publications

References 8 publications

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

High‐Resolution, Flexible, and Full‐Color Perovskite Image Photodetector via Electrohydrodynamic Printing of Ionic‐Liquid‐Based Ink

Method of realizing compact Fourier transform spectrometer without moving parts based on birefringent liquid crystal

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