The role of engineered materials in superconducting tunnel junction X-ray detectors - Suppression of quasiparticle recombination losses via a phononic band gap

Details The role of engineered materials in superconducting tunnel junction X-ray detectors - Suppression of quasiparticle recombination losses via a phononic band gap The role of engineered materials in superconducting tunnel junction X-ray detectors - Suppression of quasiparticle recombination losses via a phononic band gap

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1743...12r&link_type=abstract

In: EUV, X-ray, and gamma-ray instrumentation for astronomy III; Proceedings of the Meeting, San Diego, CA, July 22-24, 1992 (A9

Astronomy and Astrophysics

Astronomy

1

Elementary Excitations, Energy Gaps (Solid State), Phonons, Recombination Reactions, Tunnel Diodes, X Ray Detectors, Aluminum, Aluminum Oxides, Bragg Angle, Inelastic Scattering, Mirrors, Niobium, Reflectance, Single Crystals, Trapped Particles

Scientific paper

An engineered structure is proposed that can alleviate quasi-particle recombination losses via the existence of a phononic band gap that overlaps the 2-Delta energy of phonons produced during recombination of quasi-particles. Attention is given to a 1D Kronig-Penny model for phonons normally incident to the layers of a multilayered superconducting tunnel junction as an idealized example. A device with a high density of Bragg resonances is identified as desirable; both Nb/Si and NbN/SiN superlattices have been produced, with the latter having generally superior performance.

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