Cooled and uncooled infrared detectors based on yttrium barium copper oxide

Roman Sobolewski; Donald P. Butler; Zeynep Celik-Butler

doi:10.1117/12.417599

8 March 2001 Cooled and uncooled infrared detectors based on yttrium barium copper oxide

Roman Sobolewski, Donald P. Butler, Zeynep Celik-Butler

Proceedings Volume 4318, Smart Optical Inorganic Structures and Devices; (2001) https://doi.org/10.1117/12.417599
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

Abstract

We review performance and physical characteristics of yttrium barium copper oxide (YBCO) compound as an infrared (IR) photodetector. YBCO has been used as the IR detector material in both superconducting (oxygen-rich) and semiconducting (oxygen-depleted) phases. YBCO in its crystalline, Yba₂Cu₃O_6+x phase with x>0.95 is a high-temperature superconducting material with the superconducting transition T_capproximately equals 90K. The superconducting YBCOIR detectors operate as either nonequilibrium (quantum) or bolometric (thermal) devices. The nonequilibrium devices are characterized by very short, single-picosecond photoresponse times and are expected to find applications in optoelectronics and imaging, as well as ultrafast optical-to-electrical transducers for digital input applications. The bolometric mechanism results in relatively slow but very sensitive detectors with possible applications in astronomy. In addition to superconducting IR sensors, interest in uncooled YBCO devices is growing very rapidly. Despite somewhat lower sensitivity and significantly reduced speed of response, as compared to the superconducting counterpartners, the uncooled IR detectors are characterized by much lower operating cost and weight due to lack of cooling cryogens and are compatible with existing silicon-based processing and fabrication. The last point is of paramount importance if the IR-sensitive pixels are to be integrated with CMOS read-out circuitry for monolithic focal plane arrays and infrared cameras. Amorphous uncooled YBCO photodetectors operate as either photoconductive bolometers of unbiased pyroelectric devices.

Citation Download Citation

Roman Sobolewski, Donald P. Butler, and Zeynep Celik-Butler "Cooled and uncooled infrared detectors based on yttrium barium copper oxide", Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); https://doi.org/10.1117/12.417599

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