ECE474S09_Lecture12 - ECE 474: Principles of Electronic...

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ECE 474: Principles of Electronic Devices Prof. Virginia Ayres Electrical & Computer Engineering Michigan State University ayresv@msu.edu
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Lecture 12: Chp. 02: Nanosystems Quantized energy levels: Atomic spectra Wavelike electrons: Davisson-Germer Particle-like photons: Photoelectric effect Wavelike electrons: What is the wavelength? What is the position and momentum? Uncertainty principle => statistical approach Examples: Quantization turns up from wavelike electrons Uncertainty principle turns up from wavelike electrons Really high resolution microscope turns up from wavelike electrons
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The wavelength of an electron: deBroglie wavelength: The particle-ness of an electron: its envelope called its “modulation” The deBroglie wave is inside the modulation wave packet
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The wavelength of an electron: deBroglie wavelength: The particle-ness of an electron: its envelope called its “modulation” Note: this λ m nomenclature is from heterodyning. Heterodyning is when you put two waves with slightly different frequencies together, getting the above two-packet envelope.
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This note was uploaded on 04/14/2009 for the course ECE 474 taught by Professor Ayres during the Spring '09 term at Michigan State University.

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ECE474S09_Lecture12 - ECE 474: Principles of Electronic...

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