An optical heterodyne mixer based on a patterned YBa2Cu3O7−δ thin film

Autor:	Matsuo Sekine, Kenichi Tanaka, Motoichi Ohtsu, M. Danerud
Rok vydání:	1996
Předmět:	Heterodyne Resistive touchscreen Optical fiber Materials science business.industry Photoconductivity Photodetector Laser law.invention law Optoelectronics Thin film business Instrumentation Diode
Zdroj:	Review of Scientific Instruments. 67:2477-2480
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1147200
Popis:	An optical heterodyne mixing technique was developed to study the photoresponse in patterned YBa2Cu3O7−δ (YBCO) thin film. Our mixing system is composed of two identical 1.54 μm wavelength laser diodes and the laser light is introduced without optical fibers onto the YBCO thin film. We succeeded in detecting the optical signals in a YBCO thin film up to 10 GHz, which could not be achieved by the conventional direct amplitude modulated method. The YBCO photodetector has a sensitivity of D*=5.0×108 cm W−1 Hz−1/2 at 77 K. This experiment enables the observation of the fast photoresponse in the resistive state. The response can be attributed to the electron heating model.
Databáze:	OpenAIRE
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