Integration and Characterization of LiTaO₃ Single Crystal Film Pyroelectric Sensor Using Mid-Infrared Metamaterial Perfect Absorber

Zhang, Kaisheng; Luo, Wenbo; Zeng, Xiaohan; Huang, Shitian; Xie, Qian; Wan, Li; Shuai, Yao; Wu, Chuangui; Zhang, Wanli

doi:10.1109/jsen.2022.3166527

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…In our previous work, LT-based pyroelectric infrared sensors have been designed and developed which show excellent pyroelectric properties. [52,53] For this work, the output current signals of the LT-based infrared sensors are converted into analog voltage signals through a trans-impedance amplifier (TIA) as the input signals of the memristive reservoir.…”

Section: An Infrared Near-sensor Rc System For Dynamic Gesture Percep...mentioning

confidence: 99%

An Infrared Near‐Sensor Reservoir Computing System Based on Large‐Dynamic‐Space Memristor with Tens of Thousands of States for Dynamic Gesture Perception

Wang,

Pan,

Zhao

et al. 2023

Advanced Science

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To efficiently process the massive amount of sensor data, it is demanding to develop a new paradigm. Inspired by neurobiological systems, an infrared near‐senor reservoir computing (RC) system, consisting of infrared sensors and memristors based on single‐crystalline LiTaO3 and LiNbO3 (LN) thin film respectively, is demonstrated. The analog memristor is used as a reservoir in the RC system to process sensor signals with spatiotemporal characteristics. LN crystal structure stacked with oxygen octahedra provides favorable conditions for reliable Mott variable‐range hopping conduction, which provides the memristor with tens of thousands of reservoir states within a large dynamic range. With the characteristics, the analog sensor signals with high data fidelity can be directly fed to the memristive reservoir, and the spatiotemporal features can be separated and mapped. The system demonstrated a dynamic gesture perception task, achieving an accuracy of 99.6%, which highlights the great application potential of the memristor in signal sensor processing and will advance the application of artificial intelligence in sensor systems. Crystal ion slicing techniques are used to fabricate a single‐crystalline thin film for both the memristor and sensor, which opens up the possibility of realizing monolithic integration of a memristor‐based near‐sensor computing system.

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Section: An Infrared Near-sensor Rc System For Dynamic Gesture Percep...mentioning

confidence: 99%

An Infrared Near‐Sensor Reservoir Computing System Based on Large‐Dynamic‐Space Memristor with Tens of Thousands of States for Dynamic Gesture Perception

Wang,

Pan,

Zhao

et al. 2023

Advanced Science

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“…Zhang et al [50] combined metamaterial perfect absorber Au/SiO 2 /Au with the LT thin film obtained by ion slicing technology to obtain an infrared sensor with wavelength selection function. The sensor has a maximum absorbance of 97.8% at 4.04 µm, a maximum voltage responsivity of 1.7 × 10 4 V/W at 8.3 Hz, a maximum detection rate of 1.7 × 10 8 cm Hz 1/2 /W, and a response time of 5.8 ms at 80.3 Hz.…”

Section: Application Of Pyroelectric Detectorsmentioning

confidence: 99%

Pyroelectric Properties and Applications of Lithium Tantalate Crystals

Si,

Xiao,

Zhang

et al. 2024

Crystals

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Lithium tantalate crystals, as a type of pyroelectric material, stand out from many other pyroelectric materials due to the advantages of high Curie temperature, large pyroelectric coefficient, high figure of merits, and environmental friendliness. Due to the pyroelectric effect caused by their spontaneous polarization, lithium tantalate crystals have broad application prospects in wide spectral bandwidth and uncooled pyroelectric detectors. This article reviews the pyroelectric properties of lithium tantalate crystals and evaluates methods for pyroelectric properties, methods for modulating pyroelectric properties, and pyroelectric detectors and their applications. The prospects of lithium tantalate thin films, doped lithium tantalate crystals, and near stoichiometric lithium tantalate crystals as response components for pyroelectric detectors are also discussed.

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“…At the core of the uncooled thermal detector development is the material choice for sensing the incoming radiation. Various materials have been used for developing thin-film pyroelectric detectors [ 9 ]: e.g., P(VDF-TrF) copolymers [ 10 ], lead zirconate titanate (PbZrTiO 3 or PZT) [ 11 ], lithium tantalate (LiTaO 3 ) [ 12 ], and lithium niobate (LiNbO 3 ) [ 13 ], with good performances. For instance, the LiTaO 3 sensor published in [ 12 ] exhibited a good detectivity value

1.7 × 10 8 cm·Hz 1/2 ·W −1 at 80 Hz but a slow response (thermal time constant

5.8 ms).…”

Section: Introductionmentioning

confidence: 99%

“…Various materials have been used for developing thin-film pyroelectric detectors [ 9 ]: e.g., P(VDF-TrF) copolymers [ 10 ], lead zirconate titanate (PbZrTiO 3 or PZT) [ 11 ], lithium tantalate (LiTaO 3 ) [ 12 ], and lithium niobate (LiNbO 3 ) [ 13 ], with good performances. For instance, the LiTaO 3 sensor published in [ 12 ] exhibited a good detectivity value

1.7 × 10 8 cm·Hz 1/2 ·W −1 at 80 Hz but a slow response (thermal time constant

5.8 ms). Other materials have also been explored for their pyroelectric response, such as aluminium nitride (AlN) [ 14 , 15 ] or yttrium–barium–copper oxide (YBa 2 Cu 3 O 6+ x , hereafter called YBCO) [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Fast and Uncooled Semiconducting Ca-Doped Y-Ba-Cu-O Thin Film-Based Thermal Sensors for Infrared

Dégardin,

Alamarguy,

Brézard Oudot

et al. 2023

Sensors

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YBa2Cu3O6+x (YBCO) cuprates are semiconductive when oxygen depleted (x < 0.5). They can be used for uncooled thermal detection in the near-infrared: (i) low temperature deposition on silicon substrates, leading to an amorphous phase (a-YBCO); (ii) pyroelectric properties exploited in thermal detectors offering both low noise and fast response above 1 MHz. However, a-YBCO films exhibit a small direct current (DC) electrical conductivity, with strong non-linearity of current–voltage plots. Calcium doping is well known for improving the transport properties of oxygen-rich YBCO films (x > 0.7). In this paper, we consider the performances of pyroelectric detectors made from calcium-doped (10 at. %) and undoped a-YBCO films. First, the surface microstructure, composition, and DC electrical properties of a-Y0.9Ca0.1Ba2Cu3O6+x films were investigated; then devices were tested at 850 nm wavelength and results were analyzed with an analytical model. A lower DC conductivity was measured for the calcium-doped material, which exhibited a slightly rougher surface, with copper-rich precipitates. The calcium-doped device exhibited a higher specific detectivity (D*=7.5×107 cm·Hz/W at 100 kHz) than the undoped device. Moreover, a shorter thermal time constant (<8 ns) was inferred as compared to the undoped device and commercially available pyroelectric sensors, thus paving the way to significant improvements for fast infrared imaging applications.

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Integration and Characterization of LiTaO₃ Single Crystal Film Pyroelectric Sensor Using Mid-Infrared Metamaterial Perfect Absorber

Cited by 8 publications

References 40 publications

An Infrared Near‐Sensor Reservoir Computing System Based on Large‐Dynamic‐Space Memristor with Tens of Thousands of States for Dynamic Gesture Perception

An Infrared Near‐Sensor Reservoir Computing System Based on Large‐Dynamic‐Space Memristor with Tens of Thousands of States for Dynamic Gesture Perception

Pyroelectric Properties and Applications of Lithium Tantalate Crystals

Fast and Uncooled Semiconducting Ca-Doped Y-Ba-Cu-O Thin Film-Based Thermal Sensors for Infrared

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