Teaching

University of California, Santa Barbara

MATRL 288K: (Graduate) Power Semiconductor Materials and Devices Winter 2022, Winter 2023

Special topics class developed and taught

Overview of power electronics, power devices, Power semiconductors: Material properties, transport physics, breakdown, Schottky Rectifiers, PiN rectifiers, Power MOSFETs, IGBT, Thyristors, Superjunction devices, GaN lateral power HEMTs, WBG ( SiC and GaN ) power device technology: materials growth/processing, Emerging topics in power semiconductor materials and devices including ultrawide bandgap semiconductors

MATRL 206B/ECE 215B (Graduate) Fundamentals of Electronic Solids II

Spring 2022, Spring 2023, Spring 2024, Spring 2025

Quick review of 206A, Perturbation Theory (needed for optical transitions and transport): Stationary, Time dependent, Fermi’s Golden Rule, Statistics: Fermi-Dirac, Bose-Einstein, Maxwell-Boltzmann, Phonons, Boltzmann Transport Equation, Drift-diffusion transport, Transport in a Weak Magnetic Field: Hall Effect, Hall Coefficients, Balance Equations, Low Field Electronic Transport: Relaxation times: Energy, Momentum, Scattering potentials and scattering rates: Phonon scattering, Ionized impurity scattering, Details of phonon scattering: Deformation potential scattering, Polar optical phonon scattering, Intervalley scattering, Overview of 2D systems, High Field Transport, Tunneling, Space Charge Transport, Ballistic Transport, Two-dimensional electron gas, Optical Transitions

MATRL 205 (Graduate) Wide Band Gap Materials and Devices Fall 2022, Fall 2023, Fall 2024 

Class redeveloped and taught

Optical and electrical properties of wide and ultra-wide band gap semiconductors (Al,In,Ga) N, SiC, Ga2O3, diamond-based semiconductor materials. Theory and practical applications of wide-band materials in electronic and optoelectronic devices. Materials growth techniques of MOCVD and MBE are discussed in the particular context of WBG semiconductors. Applications of these materials in lasers, LEDs, high frequency transistors and power devices emphasized.

MATRL 200B (Graduate) Electronic and Atomic Structure of Materials Winter 2024 , Winter 2025

Specific heat: Einstein and Debye models,  Drude model, Sommerfeld theory, Chemical bonding, Vibrational modes, Tight-binding 1D chain, Crystal structure, reciprocal lattice, Diffraction, Bloch’s theorem, Classification of electronic structure, Optical properties, Semiconductors, Intro to magnetism.