Figures of merit of thermoelectric and bolometric thermal radiation sensors

Dillner, U.; Kessler, E.; Meyer, H.‐G.

doi:10.5194/jsss-2-85-2013

Cited by 56 publications

(34 citation statements)

References 33 publications

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“…Given the simplified situation where Johnson noise dominates the detector noise, the detectivity of a CNT PTE detector depends [105] on the thermoelectric figure of merit ZT as where (17) with κ the thermal conductivity of the CNT film. Thus, improving the performance of PTE detectors requires improving the full thermoelectric properties of the active material.…”

Section: S Tdxmentioning

confidence: 99%

Uncooled Carbon Nanotube Photodetectors

Léonard

Kono

2015

Advanced Optical Materials

158

166

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Photodetectors play key roles in many applications such as remote sensing, night vision, reconnaissance, medical imaging, thermal imaging, and chemical detection. Several properties such as performance, reliability, ease of integration, cost, weight, and form factor are all important in determining the attributes of photodetectors for particular applications. While a number of materials have been used over the past several decades to address photodetection needs across the electromagnetic spectrum, the advent of nanomaterials opens new possibilities for photodetectors. In particular, carbon-based nanomaterials such as carbon nanotubes (CNTs) and graphene possess unique properties that have recently been explored for photodetectors. Here, we review the status of the field, presenting a broad coverage of the different types of photodetectors that have been realized with CNTs, placing particular emphasis on the types of mechanisms that govern their operation. We present a comparative summary of the main performance metrics for such detectors, and an outlook for performance improvements.2

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Section: S Tdxmentioning

confidence: 99%

Uncooled Carbon Nanotube Photodetectors

Léonard

Kono

2015

Advanced Optical Materials

158

166

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“…Our calculations [2] show that optical NEP below 1 pW/Hz 1/2 and τ in the order of 1 ms can be achieved. These values are considerably better than those of the state of the art [4]. Our calculations show [2] also that the larger detectors are limited only by the background radiation instead of the detector internal noise.…”

Section: Estimated Optical Performance Of Thermoelectric Bolometers Bmentioning

confidence: 56%

Silicon Based Nano-Thermoelectric Bolometers for Infrared Detection

et al. 2018

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The state-of-the-art infrared (IR) detection uses quantum photodetectors and bolometers. Quantum IR photodetectors are expensive and require cooling, and exotic and toxic materials. Whereas, bolometers are cost-efficient and uncooled, but they are much slower and less sensitive. Recently we have demonstrated that ultra-thin, highly-doped silicon membranes can be used to build fast and highly-sensitive thermoelectric bolometers. We present the fabrication of these devices, electro-thermal characterization results, and estimate the full potential of this technology.

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“…The proposed detector when fabricated in a suspended architecture can reach to higher responsivity and D*. The predicted responsivity of the suspended proposed microbolometer working at room temperature is R max ≈1 kV/W -10 kV/W, D*≈5 × 10 7 cmHz 1/2 W −1 -2 × 10 9 cmHz 1/2 W −1 , while the time constant is τ = 0.5 ms -1s for a similar pixel dimension [59][60][61].…”

Section: Light Detectionmentioning

confidence: 92%

Multi-spectral frequency selective mid-infrared microbolometers

Safaei¹,

Modak²,

Lee³

et al. 2018

Opt. Express

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Frequency selective detection of low energy photons is a scientific challenge using natural materials. A hypothetical surface which functions like a light funnel with very low thermal mass in order to enhance photon collection and suppress background thermal noise is the ideal solution to address both low temperature and frequency selective detection limitations of present detection systems. Here, we present a cavity-coupled quasi-three dimensional plasmonic crystal which induces impedance matching to the free space giving rise to extraordinary transmission through the sub-wavelength aperture array like a "light funnel" in coupling low energy incident photons resulting in frequency selective perfect (~100%) absorption of the incident radiation and zero back reflection. The peak wavelength of absorption of the incident light is almost independent of the angle of incidence and remains within 20% of its maximum (100%) up to i θ 45 ≤ . This perfect absorption results from the incident light-driven localized edge "micro-plasma" currents on the lossy metallic surfaces. The wide-angle light funneling is validated with experimental measurements. Further, a super-lattice based electronic biasing circuit converts the absorbed narrow linewidth (0 / Δ < λ λ 0.075) photon energy inside the sub-wavelength thick film (< λ/100) to voltage output with high signal to noise ratio close to the theoretical limit. Such artificial plasmonic surfaces enable flexible scaling of light funneling response to any wavelength range by simple dimensional changes paving the path towards room temperature frequency selective low energy photon detection.

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Figures of merit of thermoelectric and bolometric thermal radiation sensors

Cited by 56 publications

References 33 publications

Uncooled Carbon Nanotube Photodetectors

Uncooled Carbon Nanotube Photodetectors

Silicon Based Nano-Thermoelectric Bolometers for Infrared Detection

Multi-spectral frequency selective mid-infrared microbolometers

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