Low and midrange modulation frequency response for YBCO infrared detectors: interface effects on the amplitude and phase

Fardmanesh, Mehdi; Rothwarf, A.; Scoles, K.

doi:10.1109/77.384561

Cited by 15 publications

(55 citation statements)

References 16 publications

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“…According to [16] and [17], the corresponding diffusivity for bulk SrTiO is 0.12 cm s. The diffusivity values found here which is derived from the basic thermal diffusion process differs from the previously reported values. This is interpreted to be due to the fact that our calculation here is mostly based on the lateral thermal conductance where [16] and [17] report the values for bulk material and for vertical thermal conductance. Hence, from an engineering point of view, one can use the diffusivity values in Table I for the calculations of the lateral thermal diffusion process for design optimizations targeting crosstalk-free operation.…”

Section: A Effect Of Separation Between the Devices On The Crosstalkcontrasting

confidence: 79%

“…The distance between the device and is 170 m. If we substitute the above values in (2), we get a diffusivity value of 0.027 at , as shown in Table I. According to [16] and [17], the corresponding diffusivity for bulk SrTiO is 0.12 cm s. The diffusivity values found here which is derived from the basic thermal diffusion process differs from the previously reported values. This is interpreted to be due to the fact that our calculation here is mostly based on the lateral thermal conductance where [16] and [17] report the values for bulk material and for vertical thermal conductance.…”

Section: A Effect Of Separation Between the Devices On The Crosstalkmentioning

confidence: 54%

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Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

Bozbey

Fardmanesh

Schubert

et al. 2006

IEEE Trans. Appl. Supercond.

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Abstract-The effect of the superconductivity transition on the thermal crosstalk in YBa 2 Cu 3 O 7 edge-transition bolometer arrays is investigated for DC to midrange modulation frequency infrared radiation. The bolometers in the arrays were designed with various distances on SrTiO 3 (100) substrates. We have observed a change in the thermal crosstalk between neighbor devices through the superconductivity transition temperature range. Superconductivity transition dependence of the thermal coupling between the devices was measured by utilizing the thermal conductance measurement methods developed for the bulk material. The knee points in the magnitude of the response versus modulation frequency curves of the devices were also determined by illuminating one of the bolometers in the arrays and measuring the response of the neighbor devices. By using the knee frequency and the distance between the bolometers, the modulation frequency criterion for crosstalk-free response at the transition region in various array structures is found and the results of the thermal coupling measurements are further studied and presented here.

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Section: A Effect Of Separation Between the Devices On The Crosstalkcontrasting

confidence: 79%

Section: A Effect Of Separation Between the Devices On The Crosstalkmentioning

confidence: 54%

Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

Bozbey

Fardmanesh

Schubert

et al. 2006

IEEE Trans. Appl. Supercond.

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“…The magnitude of the bolometric response can easily be calculated with a simple RC-model resulting in following expression [13,[20][21][22]:…”

Section: Introductionmentioning

confidence: 99%

The superconducting transition width and illumination wavelength dependence of the response of MgO substrate YBCO transition edge bolometers

Öktem¹,

Bozbey²,

Avci³

et al. 2007

Physica C: Superconductivity

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Dependence of the phase and magnitude of the response of MgO substrate YBa 2 Cu 3 O 7Àd (YBCO) transition edge bolometers to the near infrared radiation on the superconducting transition width is presented in this work. The bolometers were made of YBCO thin films of 200 nm thickness that were grown on single crystal MgO (1 0 0) substrates by DC inverted cylindrical magnetron sputtering. We have measured the responses of both large and small area devices with respect to the bias temperature and radiation modulation frequency. We have observed that the superconducting transition width has major effects on the response of the bolometers such as; on a dip of the phase of the response versus modulation frequency curve around 1 Hz, the rate of decrease of the magnitude of the response, and dependence of the phase of the response on temperature at mid-range modulation frequency. We have investigated a correlation between the superconducting transition width and the YBCO film surface morphology of the devices. In addition, the illumination wavelength dependence of the optical response of both wide and narrow transition width devices has been investigated. Here we present the analysis and the possible mechanisms that can affect the response of the bolometers at the superconducting transition region.

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“…150 nm thick YBCO thin films were grown on the STO substrates, with and without the CeO 2 layer, by offaxis RF magnetron sputtering system. These YBCO thin films were patterned using standard photolithographic techniques [15] with an accuracy of about 0.6µm, to form a meanderline pattern with 55 µm linewidth providing an active area of 1.44 mm 2 for the device. Considering these dimensions for the pattern, a room temperature resistance of∼ 6.5 KΩ, the critical transition temperature (T Conset ) of 90 K with R onset around 2.2KΩ and a transition width of ∼1.9 K were obtained for the deposited film.…”

Section: A Device Preparationmentioning

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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Low and midrange modulation frequency response for YBCO infrared detectors: interface effects on the amplitude and phase

Cited by 15 publications

References 16 publications

Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

The superconducting transition width and illumination wavelength dependence of the response of MgO substrate YBCO transition edge bolometers

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

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Low and midrange modulation frequency response for YBCO infrared detectors: interface effects on the amplitude and phase

Cited by 15 publications

References 16 publications

Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

Superconductivity transition dependence of the thermal crosstalk in YBa/sub 2/Cu/sub 3/O/sub 7-x/ edge-transition bolometer arrays

The superconducting transition width and illumination wavelength dependence of the response of MgO substrate YBCO transition edge bolometers

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

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