Accession Number:

ADP011748

Title:

Terahertz Spectral Analysis by Frequency-Selective Incoherent Detection in High-T(c) Josephson Junctions

Descriptive Note:

Corporate Author:

RUSSIAN ACADEMY OF SCIENCES MOSCOW INST OF RADIO ENGINEERING AND ELECTRONICS

Personal Author(s):

• Divin, Yuri
• Poppe, Ulrich
• Urban, Knut
• Volkov, Oleg
• Pavlovskii, Valery

Report Date:

2000-09-29

Pagination or Media Count:

4.0

Abstract:

The detector response of YBa2Cu3O7-x Josephson grain-boundary junctions to monochromatic radiation with the frequency in the range from 60 GHz to 5 THz has been studied. Odd-symmetric resonances near the voltages Vhf2e in the responses delta I V of these junctions to radiation with different frequencies f have been observed in a decade of spectral range for any operating temperature between 30 to 85 K. The spectral range of this selective detection has scaled with the I sub c R sub n-product of the Josephson junction, so decreasing the junction temperature from 85 to 30 K one can perform the spectral analysis in two decades. A prototype of terahertz Hilbert-transform spectrum analyzer based on high-Tc Josephson junction integrated into a Stirling cooler has been developed. A resolving power of around 10 exp -3 has been demonstrated in the spectral analysis of output radiation from optically-pumped far-infrared CH3OH laser.

Descriptors:

• *HIGH TEMPERATURE
• *FAR INFRARED RADIATION
• *SPECTRUM ANALYSIS
• *JOSEPHSON JUNCTIONS
• *YTTRIUM BARIUM COPPER OXIDES
• SYMPOSIA
• LASER BEAMS
• INCOHERENCE
• FREQUENCY BANDS
• INFRARED LASERS
• ELECTROMAGNETIC RADIATION
• INFRARED DETECTORS
• OSCILLATION
• MONOCHROMATIC LIGHT
• INTEGRAL TRANSFORMS
• OPTICAL PUMPING

Subject Categories:

• Electrical and Electronic Equipment
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE