Thin film like terahertz bolometric detector on Bi2212 single crystal

Semerci, Tugce; Demirhan, Yasemin; Miyakawa, Nobuaki; Wang, Huabing; Özyüzer, L.

doi:10.1007/s11082-016-0612-0

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…Without that, the residual memory from the previous frame smears the image if the scene changes. To determine the time constant of the suspended nanofibers, they were illuminated with an IR lamp in an ON-OFF cycle for a fixed interval of time and the rise time of the current pulse was measured [45]. Figure 4(a) shows the captured current pulse vs time at increasing distance from the BB source.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer

Paul,

Vadnala,

Bonam

et al. 2023

J. Micromech. Microeng.

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La1−x Sr x MnO3 manganite oxides have shown great potential for infrared (IR) sensing. In this study, La0.7Sr0.3MnO3 (LSMO) nanofibers, synthesized by a simple electrospinning process, are suspended between gold interdigitated electrode (IDE). These electrodes, which acts as a supporting platform for the dangling nanofiber, are microelectromechanical systems based that can be fabricated quickly and economically with fewer fabrication steps. Due to the large surface-area-to-volume ratio, these fibers have outstanding thermo-electrical properties, which puts them in the leagues of materials suitable for IR sensing. Performance-wise these hanging nanofibers belong to a class of promising thermal sensors due to negligible thermal loss. The optoelectrical characterization shows its temperature coefficient of resistance (TCR) is −1.48%K−1, and its electrical resistance follows an inverse square law for distance from the IR source. The fabricated LSMO nanofibers based microbolometer has a significantly low thermal time constant with average thermal response and recovery time of 63 ms and 77 ms, respectively. Furthermore, they show encouraging bolometric properties with thermal conductance, thermal capacitance, voltage responsivity, and thermal noise limited detectivity of 3.6 × 10−3WK−1, 0.2268 × 10−3JK−1 , 1.96 × 105VW−1, and 3.7 × 108cm Hz1/2W−1 respectively. The high voltage responsivity and TCR, commensurate with the ultralow response and recovery time confirm that the fabricated Microbolometer can find industrial applications as thermal sensors.

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Section: Resultsmentioning

confidence: 99%

Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer

Paul,

Vadnala,

Bonam

et al. 2023

J. Micromech. Microeng.

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“…Since it is di cult to develop devices which can interact, generate or detect radiation due to the typically weak electromagnetic response of bulk materials in the frequency range between 0.1 and 10 THz, this region is usually called the THz gap. There are important efforts focusing to ll this vacancy in the spectrum (Tonouchi et al 2007; Kawayama et al 2013;Ferguson et al 2006;Ozyuzer et al 2007; Demirhan et al 2017;Semerci et al 2016). Due to their latent utilizations in security monitoring (THz imaging), non-destructive testing, wireless communications, and material characterization metamaterials manipulating light in the THz regime have drawn great attention.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Resonant Properties of Metamaterial THz Modulators Fabricated from Vanadium Dioxide Thin Films

Zeybek

Demirhan

Noori

et al. 2023

Preprint

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The metal to insulator transition (MIT) in vanadium dioxide (VO2) has played a key role in development of devices in the terahertz frequency range. In the present study, the use of VO2 patterned as a metamaterial surface or coupled as a homogeneous layer with a metallic metamaterial surface on top is investigated in terms of performance. High quality VO2 thin films were deposited on c-cut sapphire substrates by using the dc magnetron sputtering technique. A change in resistivity by a factor of 104 MIT in VO2 was observed allowing to investigate its use as a controllable metamaterial. The layer was patterned using a unique geometry (four-cross shaped) that operates in the THz frequency range. To understand its performance as a tunable THz filter, the four-cross structure fabricated from VO2 is compared to one fabricated from Au on VO2 bare film using UV lithography and ion beam etching techniques. The spectral performances of metamaterials was assesed using THz-Time Domain Spectroscopy (THz-TDS) and results were compared with simulations based on CST Microwave Studio. Absence of the resonant effects in the purely developed VO2 device while clear observation of the MIT behavior shows the strong dependency of the inductive and/or capacitive effets of the four-cross structure on conductivity of the surface metamaterial which is clearly observable for the Au-based device. In the latter case, the resonant transmittance of the filter can be effectively modulated by change in temperature.

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“…Bi 2 Sr 2 CaCu 2 O 8+δ (Bi-2212) is a high-T c superconductor (HTSC), whose magnetic and superconducting properties are still being investigated [1][2][3][4][5][6][7][8][9]. In particular, Bi-2212 single crystals are considered to be a key element for THz emitters devices in modern electronics [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Magnetization of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ micrometer thin ring and its depinning line

Semenenko,

Camargo,

Setzer

et al. 2021

Preprint

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We demonstrate a geometrical effect on the depinning line (DL) of the flux line lattice of the Bi 2 Sr 2 CaCu 2 O 8+δ high-T c superconductor (HTSC) micrometer ring. The DL shifts to notably lower temperatures in comparison to bulk crystals and thin flakes of the same sample. The shift is attributed to a decrease in the overall pinning potential due to a double size effect, namely: a) the ring thickness ∼ 1 µm being smaller than the pinning correlation length, and b) the increase in the effective London penetration depth of the vortices (Pearl vortices). The large shift of the DL to lower temperatures may influence the suitability of this HTSC for applications in microstrip antennas and THz emitters.

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Thin film like terahertz bolometric detector on Bi2212 single crystal

Cited by 10 publications

References 24 publications

Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer

Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer

Investigation of Resonant Properties of Metamaterial THz Modulators Fabricated from Vanadium Dioxide Thin Films

Magnetization of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ micrometer thin ring and its depinning line

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Thin film like terahertz bolometric detector on Bi2212 single crystal

Cited by 10 publications

References 24 publications

Fabrication and characterization of suspended La0.7Sr0.3MnO3 nanofibers for high-sensitive and fast-responsive infrared bolometer

Fabrication and characterization of suspended La0.7Sr0.3MnO3 nanofibers for high-sensitive and fast-responsive infrared bolometer

Investigation of Resonant Properties of Metamaterial THz Modulators Fabricated from Vanadium Dioxide Thin Films

Magnetization of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$ micrometer thin ring and its depinning line

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Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer

Fabrication and characterization of suspended La_0.7Sr_0.3MnO₃ nanofibers for high-sensitive and fast-responsive infrared bolometer