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

Abstract

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.

The effects of the post-annealing temperature on the growth mechanism of Bi2Sr2Ca1Cu2O8+ thin films produced on MgO (1 0 0) single crystal substrates by pulsed laser deposition (PLD)

“…Superconducting electronics devices require having high quality thin films, with high T C values and very smooth surfaces as well as in single crystalline form. In particular, the use of high quality high-T C thin films is important for device applications like SQUIDs [22,25], THz radiation sources [26], bolometers [23], intrinsic Josephson junctions [17,27], and other cryo-electronic devices.…”

Substrate and Device Pattern Dependence of the Thermal Crosstalk in Y Ba$_2$Cu$_3$O$_{7-\delta}$ Transition Edge Bolometer Arrays

“…We observed that as the transition width increases, the phase dip at low frequencies decreases due to the difference of the lateral thermal conductivity of the YBCO film. However, for the purpose of this study, we have coated the contact paths of the bolometers with gold; this dominated over the thermal parameters of the film and we did not observe the phase dip at low frequencies that happened with the low-quality films in [10]. We can only interpret that the difference in the crosstalk-based phase of the response is not associated with the transition width of the films.…”

“…In [10], we investigated the effect of the transition width and film quality of the YBCO films on the response of a single pixel bolometer. We observed that as the transition width increases, the phase dip at low frequencies decreases due to the difference of the lateral thermal conductivity of the YBCO film.…”

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

“…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]…”

“…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).…”