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Introduction & waves

Introduction & waves. Fundamentals of materials and devices 55:072. Professor Karl E. Lonngren lonngren@engineering.uiowa.edu 4312 SC office hours: 12:15 – 1:00 TTh. Demonstration in 2005. 2008 election. Iowa caucus 2008. Kent Hutchinson – 260 IATL <kahutchi@engineering.uiowa.edu>.

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Introduction & waves

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  1. Introduction & waves

  2. Fundamentals of materials and devices55:072 Professor Karl E. Lonngren lonngren@engineering.uiowa.edu 4312 SC office hours: 12:15 – 1:00 TTh

  3. Demonstration in 2005

  4. 2008 election

  5. Iowa caucus 2008

  6. Kent Hutchinson – 260 IATL <kahutchi@engineering.uiowa.edu> Text “Introduction to semiconductor devices” McGraw-Hill 2005 References: “Fundamentals of electromagnetics with MATLAB” SciTech Press 2007 “Introduction to physical electronics” Allyn & Bacon 1988 Grading 2 exams @ 100 term paper/presentation@ 50 homework @ 50 Work together? example major equation

  7. Course outline • Waves & strange experiments • Schrödinger equation & energy levels • Solid-state materials • PN junctions • Exam #1 – Spring break • MOS capacitor • Field effect transistors & MOSFET • Bipolar junction transistors • Velocity modulation & plasma physics • Oral reports • Exam #2

  8. Simple waves First order partial differential equation First order partial differential equation Second order partial differential equation General solution

  9. z z F (z - ct) G (z + ct)

  10. Periodic boundary conditions

  11. Time harmonic excitation • Wave equation • Time harmonic excitation • Wave equation becomes • Solution

  12. Time harmonic excitation • Wave number • wavelength

  13. Dispersion relation • Wave equation • Time harmonic solution

  14. Dispersion relation

  15. Dispersion relation

  16. Dispersion relation

  17. Standing waves • solution • factorization • Reflection • b = -a • Standing wave solution

  18. Standing waves --(0) = (a) = 0

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