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Folosirea ghidurilor de unda supraconductoare la detectia rapida si eficienta a fotonilor. C unostinte : ecuatiile lui Maxwell , ecuatiile de unda ,supraconductori, ghiduri de unda , folosirea unor programe de calcul. Ghid de unda supraconductor-detector de fotoni.
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Folosirea ghidurilor de unda supraconductoare la detectia rapida si eficienta a fotonilor Cunostinte: ecuatiile lui Maxwell, ecuatiile de unda,supraconductori, ghiduri de unda, folosirea unor programe de calcul
Ghid de unda supraconductor-detector de fotoni • Detectia luminii are loc pentru frecvente mai mari decat decat o valoare data (gapul de frecventa in supraconductor) si consta in anihilarea unor perechi de electroni Cooper si crearea unui numar de electroni normali de doua ori mai mare decat numarul perechilor Cooper distruse.
Schema unui detector de fotonicu un ghid de unda • Viteza de faza mare, lungimea de propagare mica
Distributia spatiala a modului TM0 (optim-absorbtie mare in YBCO, absorbtie mica in aur ) dGOLD = 10nm 30nm
Moduri ghidate • Modul fundamental TE0
Moduri ghidate • Modul TE1
Modul leaky • Modul leaky
Ghiduri de unda supraconductoare • Sectiunea transversala
Moduri • (a)TE0 (b) TM0
Ghiduri de unda supraconductoare • Sectiunea transversala
Moduri • (a)TM0 (b) TM1
Puterea totala • Puterea totala
Bibliografie • 1. V. A. Popescu, N. N. Puscas, G. Perrone, Sensitivity of traveling wave photodetectors in superconducting box-shaped plasmon-polariton optical waveguides, Journal of Superconductivity and Novel Magnetism, Published online, 31 July 2010 • 2. V. A. Popescu, N. N. Puscas, G. Perrone, Power absorbtion efficiency in superconducting box-shaped optical waveguides, Journal of Superconductivity and Novel Magnetism, Published online, 18 June 2010 • 4. V. A. Popescu, Increase the power absorbtion efficiency in superconducting waveguides, Optoelectronics and Advanced Materials – Rapid Communications (OAM-RC) Vol. 4, ISS 5, pag. 735 – 739, (2010) • 5. V. A. Popescu, N. N. Puscas, Comparison between TE and TM modes in superconducting multilayer optical planar waveguides, Optoelectronics and Advanced Materials – Rapid Communications (OAM-RC) Vol. 4, ISS 8, pag. 1102 – 1105, (2010) • and Advanced Materials (JOAM), Vol. 11, ISS 6, pag. 777-781, (2009) • 9. V. A. Popescu, N. N. Puscas, Determination of field profile in multiple superconducting quantum well optical planar waveguides, Optoelectronics and Advanced Materials – Rapid Communications (OAM-RC) Vol. 3, ISS 10, pag. 982 – 984, (2009) • 10. V. A. Popescu, Power absorption efficiency in plasmon - polariton optical superconducting planar and rib waveguides Optoelectronics and Advanced Materials – Rapid Communications (OAM-RC), Vol. 3, ISS 12, pag. 1259 – 1263, (2009). • Vasile Popescu vapopescu@yahoo.com