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Unconventional Superconductors
  • Language: en
  • Pages: 202

Unconventional Superconductors

This book offers a comprehensive summary of experiments that are especially suited to reveal the order-parameter symmetry of unconventional superconductors. It briefly introduces readers to the basic theoretical concepts and terms of unconventional superconductivity, followed by a detailed overview of experimental techniques and results investigating the superconducting energy gap and phase, plus the pairing symmetry. This review includes measurements of specific heat, thermal conductivity, penetration depth and nuclearmagnetic resonance and muon-spin rotation experiments. Further, point-contact and tunnelling spectroscopy and Josephson experiments are addressed. Current understanding is reviewed from the experimental point of view. With an appendix offering five tables with almost 200 references that summarize the present results from ambient pressure heavy-fermion and noncopper-oxide superconductors, the monograph provides a valuable resource for further studies in this field.

High-Speed, Low-Power and Mid-IR Silicon Photonics Applications
  • Language: en
  • Pages: 120

High-Speed, Low-Power and Mid-IR Silicon Photonics Applications

In this book, the first high-speed silicon-organic hybrid (SOH) modulator is demonstrated by exploiting a highly-nonlinear polymer cladding and a silicon waveguide. By using a liquid crystal cladding instead, an ultra-low power phase shifter is obtained. A third type of device is proposed for achieving three-wave mixing on the silicon-organic hybrid (SOH) platform. Finally, new physical constants which describe the optical absorption in charge accumulation/inversion layers in silicon are determined.

Silicon-Organic Hybrid Platform for Photonic Integrated Circuits
  • Language: en
  • Pages: 210

Silicon-Organic Hybrid Platform for Photonic Integrated Circuits

We study the potential of the silicon-organic hybrid (SOH) platform for integrated optics. The unique properties of selected organic materials are added to silicon devices made with CMOS-based processes. We investigate the feasibility of this approach by making prototypes of key components in form of photonic integrated circuits: SOH lasers and SOH modulators are designed, fabricated, post-processed, and characterized. Application scenarios are identified.

Silicon Photonic Modulators for Low-power Applications
  • Language: en
  • Pages: 250

Silicon Photonic Modulators for Low-power Applications

In this book, silicon photonic integrated circuits are combined with electro-optic organic materials for realizing energy-efficient modulators with unprecedented performance. These silicon-organic hybrid Mach-Zehnder modulators feature a compact size, sub-Volt drive voltages, and they support data rates up to 84 Gbit/s. In addition, a wet chemical waveguide fabrication scheme and an efficient fiber-chip coupling scheme are presented.

Elektrischer Transport durch Nanokontakte von Selten-Erd-Metallen
  • Language: de
  • Pages: 110

Elektrischer Transport durch Nanokontakte von Selten-Erd-Metallen

Die vorliegende Arbeit behandelt den elektrischen Transport durch Nanokontakte von Seltenen Erden, die mit der Methode der mechanisch kontrollierten Bruchkontakte hergestellt wurden. Der elektrische Transport wird stark von der elektronischen Struktur der Metalle geprägt, wofür vermutlich eine unterschiedlich starke Lokalisierung der 4f-Zustände verantwortlich ist.

Emergenz
  • Language: de
  • Pages: 194

Emergenz

Das Universum erschien bis ins 19. Jahrhundert wie ein ablaufendes mechanisches Uhrwerk. Der Schock kam im frühen 20. Jahrhundert mit dem Aufkommen der Quantenmechanik. Die Anwendung der klassischen Gesetze auf Atome führte zu hoffnungslos falschen Ergebnissen. Atome verhalten sich überhaupt nicht wie Billardkugeln: Flüssigkeiten und Feststoffe sind ein Zusammenschluss von Quantenobjekten zu makroskopischen Substanzen, aber ihre Eigenschaften flüssig oder fest lassen sich nicht von den Eigenschaften einzelner Quanten ableiten. Sie entstehen offensichtlich spontan durch kollektive Organisation auf der Makroebene (Emergenz). Das heißt: »Das Ganze ist mehr als die Summe seiner Teile.« Welch eine Überraschung, dass sich unsere Alltagswelt als ein emergentes Phänomen erweist! Wenn wir unseren Blick schärfen für das Prinzip der kollektiven Organisation, dann erkennen wir überall das Wirken von Emergenz. Dieses Arbeits- und Handbuch soll Ihnen als Werkzeug dienen, wenn Sie mit geschärftem Blick die Geheimnisse der Emergenz in unserer Welt beobachten.

Active and Passive Plasmonic Devices for Optical Communications
  • Language: en
  • Pages: 192

Active and Passive Plasmonic Devices for Optical Communications

A short introduction to the theory of surface plasmon polaritons (SPPs) is given. The application of the SPPs in on-chip signal processing is discussed. In particular, two concepts of plasmonic modulators are reported, wherein the SPPs are modulated by 40 Gbit/s electrical signals. Phase and Mach-Zehnder modulators employing the Pockels effect in electro-optic organic materials are discussed. A few micro-meter long SPP absorption modulator based on a thin layer of indium-tin-oxide is reported.

Annual Report
  • Language: en
  • Pages: 428

Annual Report

  • Type: Book
  • -
  • Published: 1994
  • -
  • Publisher: Unknown

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Bibliographie psychologischer Literatur aus den deutschsprachigen Ländern
  • Language: de
  • Pages: 902

Bibliographie psychologischer Literatur aus den deutschsprachigen Ländern

  • Type: Book
  • -
  • Published: 2000
  • -
  • Publisher: Unknown

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Who's Who in Science and Engineering 2008-2009
  • Language: en
  • Pages: 2472

Who's Who in Science and Engineering 2008-2009

  • Type: Book
  • -
  • Published: 2007-12
  • -
  • Publisher: Unknown

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