Detectivity Analysis and Optimization of Large-Area Freestanding-Type HTS Bolometers

Moftakharzadeh, Ali; Kokabi, Alireza; Banzet, M.; Schubert, J.; Fardmanesh, Mehdi

doi:10.1109/tasc.2011.2179543

Cited by 9 publications

(22 citation statements)

References 29 publications

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“…Bolometers are radiation sensors that detect incident energy via the increase of the temperature T caused by the absorption of incoming photons [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Bolometers are often used, e.g., for thermal infrared cameras (see, e.g., [1][2][3][4][5][6][7][8][9][10]), mm-wave sensing [1][2][3][4][5][6][8][9][10][11][12][13], space-based [12,13], laboratory far-infrared spectroscopy [13], etc. [1][2][3][4][5][6][7][8][9]…”

Section: Introductionmentioning

confidence: 99%

“…Bolometers are often used, e.g., for thermal infrared cameras (see, e.g., [1][2][3][4][5][6][7][8][9][10]), mm-wave sensing [1][2][3][4][5][6][8][9][10][11][12][13], space-based [12,13], laboratory far-infrared spectroscopy [13], etc. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Superconductors are among the best candidate materials for bolometers, due to their extreme sensitivity to T near the superconducting transition, measurable for instance through the sharp variations of the electrical resistance R (resistive transition-edge bolometer-TES).…”

Section: Introductionmentioning

confidence: 99%

“…For resistive TES bolometers, a key figure for performance is the so-called "temperature coefficient of resistance" (TCR), given by [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]:…”

Section: Introductionmentioning

confidence: 99%

“…After the discovery of high-T c cuprate superconductors (HTS), various authors have explored their use for resistive bolometers with simpler liquid-nitrogen-based cryogenics (the so-called resistive HTS TES bolometers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]). The compound YBa 2 Cu 3 O δ (YBCO) is the HTS material usually considered for this application, usually with maximum-T c doping, i.e., stoichiometry δ 6.93.…”

Section: Introductionmentioning

confidence: 99%

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Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

et al. 2020

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We calculate the effects of doping nanostructuration and the patterning of thin films of high-temperature superconductors (HTS) with the aim of optimizing their functionality as sensing materials for resistive transition-edge bolometer devices (TES). We focus, in particular, on spatial variations of the carrier doping into the CuO 2 layers due to oxygen off-stoichiometry, (that induce, in turn, critical temperature variations) and explore following two major cases of such structurations: First, the random nanoscale disorder intrinsically associated to doping levels that do not maximize the superconducting critical temperature; our studies suggest that this first simple structuration already improves some of the bolometric operational parameters with respect to the conventional, nonstructured HTS materials used until now. Secondly, we consider the imposition of regular arrangements of zones with different nominal doping levels (patterning); we find that such regular patterns may improve the bolometer performance even further. We find one design that improves, with respect to nonstructured HTS materials, both the saturation power and the operating temperature width by more than one order of magnitude. It also almost doubles the response of the sensor to radiation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

et al. 2020

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“…At present, TEBs are limited in relation to concurrent detectivity D * (cm· √ Hz/W) and the response time τ (s). However, recent work [4]- [7] has demonstrated that both the detectivity and response time of TEBs may potentially surpass the levels of other radiation detectors. The main effective method for increasing the detectivity in high performance TEBs is optimization of the thermal parameters of the detector [8]- [13] to increase the responsivity r v (V/W), by which the detectivity is linearly scales.…”

Section: Introductionmentioning

confidence: 99%

Investigation of CeO₂Buffer Layer Effects on the Voltage Response of YBCO Transition-Edge Bolometers

Mohajeri

Nazifi

Wulff

et al. 2016

IEEE Trans. Appl. Supercond.

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Abstract-The effect on the thermal parameters of superconducting transition edge bolometers produced on a single crystalline SrTiO3 (STO) substrate with and without a CeO2 buffer layer was investigated. Metal organic deposition was used to deposit the 20 nm CeO2 buffer layer, while RF magnetron sputtering was applied to fabricate 150 nm thick superconducting YBa2Cu3O 7−δ (YBCO) thin film. The critical transition temperature for both of the YBCO films was 90 K and the transition width was ∼1.9 K. The bolometers fabricated from these samples were characterized with respect to the voltage phase and amplitude responses, and the results were compared to that of simulations conducted by applying a one-dimensional thermophysical model. It was observed that adding the buffer layer to the structure of the bolometer results in an increased response at higher modulation frequencies. Results from simulations made by fitting the thermal parameters in the model with and without an additional CeO2 layer were found to be in agreement with the experimental observations.

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Effective Thermal Properties of a HTS Transition Edge Bolometer for High‐Flux Neutron Detection

Brock,

Østergaard,

Wulff

et al. 2023

Adv Elect Materials

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Many applications require monitoring of increasingly high neutron flux levels. Pre‐neutron characterization is performed of a superconducting transition edge bolometric device, sensitive to neutrons by an enriched boron carbide (10B4C) layer. Heat from the absorption of neutrons is simulated using an attenuated laser, while the detector is cooled to the critical temperature, Tc. Frequency dependent (4–25 Hz) and constant input power measurements are performed on a 10B4C‐coated and a non‐coated pixel. Results are used to fit a two lumped element thermal model. The effective specific heat is highly dependent on the input pulse duration due to the interconnected stack structure. For modulated pulses, the active volume in the thermal circuit is the full depth of the substrate in the area under the pixel. For constant power input, a large portion of the substrate is heated and the interface conductivities to the cold finger are found to be important. The detectivity is D* = 3.5 × 108 , and is only slightly lower than similar detectors. Understanding the dynamics of the detector better and using neutron excitation, it is expected that optimizations can lead to an equally good detector for cold to thermal neutrons at flux levels >106 n cm−2s−1.

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Detectivity Analysis and Optimization of Large-Area Freestanding-Type HTS Bolometers

Cited by 9 publications

References 29 publications

Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

Investigation of CeO₂Buffer Layer Effects on the Voltage Response of YBCO Transition-Edge Bolometers

Effective Thermal Properties of a HTS Transition Edge Bolometer for High‐Flux Neutron Detection

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Detectivity Analysis and Optimization of Large-Area Freestanding-Type HTS Bolometers

Cited by 9 publications

References 29 publications

Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

Calculations of Some Doping Nanostructurations and Patterns Improving the Functionality of High-Temperature Superconductors for Bolometer Device Applications

Investigation of CeO2Buffer Layer Effects on the Voltage Response of YBCO Transition-Edge Bolometers

Effective Thermal Properties of a HTS Transition Edge Bolometer for High‐Flux Neutron Detection

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Investigation of CeO₂Buffer Layer Effects on the Voltage Response of YBCO Transition-Edge Bolometers