Sub-10 pW/Hz0.5 room temperature Ni nano-bolometer

Yang, Hyun‐Ho; Rebeiz, Gabriel M.

doi:10.1063/1.4940975

Cited by 14 publications

(7 citation statements)

References 26 publications

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“…Understanding phonon transport is crucial to engineering novel nanoscale systems, such as thermal energy storage 1 – 3 , heat-assisted memory 4 , 5 , sensors 6 , 7 , and integrated nanoelectronics 8 , 9 . Previous studies of phonons in single crystalline silicon have established an increasingly comprehensive microscopic model of how phonons interact with introduced nanoscale features and boundaries 10 .…”

Section: Introductionmentioning

confidence: 99%

Phonon Conduction in Silicon Nanobeam Labyrinths

Park

Romano

Ahn

et al. 2017

Sci Rep

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Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed “line-of-sight” (LOS) between the heat source and heat sink. The labyrinths range from straight nanobeams with a complete LOS along the entire length to nanobeams in which the LOS ranges from partially to entirely blocked by introducing slits, s = 95, 195, 245, 295 and 395 nm. The measured thermal conductivity of the samples decreases monotonically from ~47 W m−1 K−1 for straight beam to ~31 W m−1 K−1 for slit width of 395 nm. A model prediction through a combination of the Boltzmann transport equation and ab initio calculations shows an excellent agreement with the experimental data to within ~8%. The model prediction for the most tortuous path (s = 395 nm) is reduced by ~14% compared to a straight beam of equivalent cross section. This study suggests that LOS is an important metric for characterizing and interpreting phonon propagation in nanostructures.

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Section: Introductionmentioning

confidence: 99%

Phonon Conduction in Silicon Nanobeam Labyrinths

Park

Romano

Ahn

et al. 2017

Sci Rep

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“…Given these multi-functional properties, CNT films allow for efficient broadband operation (while showing good PTE properties), efficient conversion of photo-irradiation power to electrical signals, and flexible adjustment and conformance to target structures. However, the photo-detection sensitivity of the existing PN-junction type CNT-film device (noise equivalent power (NEP) of 30 pWHz −1/2 ) 43 is still lower than that of state-of-the-art, solid-state, uncooled, broadband photo-detectors (sub-10 pWHz −1/2 ) 44 , 45 . This demonstrates a need to understand the device’s working mechanism.…”

Section: Resultsmentioning

confidence: 99%

Robot-assisted, source-camera-coupled multi-view broadband imagers for ubiquitous sensing platform

Yuasa

Utaki

et al. 2021

Nat Commun

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Multi-functional photo-imaging garners attention towards the development of universal safety-net sensor networks. Although there are urgent needs to comprehensively address the optical information from arbitrarily structured and located targets, investigations on multi-view sensitive broadband monitoring, being independent of the operating environment, are yet to be completed. This study presents a robot-assisted, photo-source and imager implanted, multi-view stereoscopic sensitive broadband photo-monitoring platform with reflective and transmissive switchable modes. A multifaceted photo-thermoelectric device design based on flexible carbon nanotube films facilitates the prototype demonstrations of non-destructive, target-structure-independent, free-form multi-view examinations on actual three-dimensional industrial components. Further functionalisation, namely, a portable system utilising three-dimensional printing and ultraviolet processing, achieves the unification of freely attachable photo-imagers and miniature photo-sources, enabling location-independent operation. Consequently, the non-destructive unmanned, remote, high-speed, omni-directional testing of a defective aerial miniature model winding road-bridge with a robot-assisted photo-source imager built into a multi-axis movable photo-thermoelectric monitor arm is demonstrated.

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“…For example, if to compare the sensitivity of two bolometers from different metals, by using the equality of resistance [3], [8], in this case the thickness of the resistive elements from low-resistivity metals will be an order of magnitude less than the thickness of the resistive elements from high-resistivity metals (for the same size of the sensitive area). Consequently, the bolometers based on the resistive elements with the smallest thickness will have the better sensitivity and performance.…”

Section: Estimationsmentioning

confidence: 99%

“…However, this approach is almost physically and technologically exhausted. At present, the minimum noise equivalent power of the uncooled metal microbolometers reaches several pW/Hz 1/2 with the resistive elements a few nanometers in thickness and a sensitive area of 10 1 -10 3 m 2 [3], [4]. To increase the sensitivity of the uncooled metal bolometers (10 times or more), there is a need in new methods.…”

Section: Introductionmentioning

confidence: 99%

Perspective Material and Applications of Uncooled Metal Bolometers

Vybornov

Andreev

2016

IEEE Sensors J.

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Abstract-A new method is proposed to compare the sensitivity of uncooled metal bolometers. This method allows us to conduct a comparative analysis for the sensitivity of uncooled bolometers with metal and metal alloy resistive elements. The experiments showed a twofold superiority in the sensitivity of the TiNi alloy based bolometer with a resistive element less than 10 Ω in resistance over the identical bolometers based on technologically applicable metals due to improved electrophysical properties. The Ti50.5Ni49.5 bolometer developed to measure the total solar radiation has a higher sensitivity, a higher measuring efficiency, a smaller weight and size compared to a serial CMP-11 pyranometer, as well as the best environmental protection. The highly sensitive uncooled metal bolometers are shown to be used as an integral part of the optical absorption gas analyzer to provide the control of background mercury vapors in the atmosphere.Index Terms-Bolometers, sensitivity, thin films, titanium alloys, power measurement, sensor systems and applications.

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Sub-10 pW/Hz0.5 room temperature Ni nano-bolometer

Cited by 14 publications

References 26 publications

Phonon Conduction in Silicon Nanobeam Labyrinths

Phonon Conduction in Silicon Nanobeam Labyrinths

Robot-assisted, source-camera-coupled multi-view broadband imagers for ubiquitous sensing platform

Perspective Material and Applications of Uncooled Metal Bolometers

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