Essential classical mechanics for device physics 5. The Lorentz oscillator model 5.1. Isotropic materials with a linear local response 5.2. Electric susceptibility of an insulating dielectric 5.3. The Kramers Kronig relation 5.4. The transverse dielectric permittivity function 5.5. Propagation of electromagnetic waves in a dielectric medium 5.6. An electromagnetic plane wave at normal incidence 5.7. Reflectance 5.8. Normal and anomalous dispersion 5.9. Permittivity due to longitudinal polar optic phonons 5.10. The loss function 4. Transient dynamics of driven oscillation 4.1. The Runge Kutta method 4.2. Phasor diagram of a harmonically driven damped oscillator 4.3. Control of a harmonically driven damped oscillator 4.4. Transient dynamics of a harmonically driven damped non harmonic oscillator 4.5. Control of systems with chaotic motion 4.6. Noise 4.7. Diffusion and mobility 2. Lattice vibrations 2.1. Harmonic oscillation of a diatomic molecule 2.2. Beyond harmonic oscillation of a diatomic molecule 2.3. The dispersion relation and symmetry 2.4. Lattice vibrations in semiconductors Continued advances in the precision manufacturing of new structures at the nanometer scale have provided unique opportunities for device physics. This book sets out to summarize those elements of classical mechanics most applicable for scientists and engineers studying device physics. Supplementary MATLAB{reg} materials are available for all figures generated numerically 6. The Drude model 6.1. DC conductivity 6.2. AC conductivity 6.3. Kinetic inductance 6.4. Permittivity of metal 6.5. Physical origin of plasma frequency 6.6. An electromagnetic field interacting with a metal 6.7. Drude dispersion of electromagnetic radiation 6.8. Changing the properties of a metal Appendices A. Physical values A 1 B. Maxwells equations Preface 1 Concepts in classical mechanics 1.1. The quantum classical boundary 1.2. Separation of scales and constraints 1.3. Newtonian mechanics 1.4. The one dimensional simple harmonic oscillator 1.5. Generalization 1.6. Increasing complexity to discover new phenomena 3. Driven oscillation 3.1. The damped oscillator subject to an external harmonic force 3.2. Coupled oscillator normal modes and beats 3.3. Coupled damped oscillator