ELEC60023 OptoelectronicsLecturer(s): Prof Richard Syms Aims
The aim of this course is to provide an introduction to a wide variety of modern optoelectronic devices, particularly those used in optical communications systems. As these devices are primarily semiconductorbased guidedwave optical components, the two main theoretical elements of the course are electromagnetic theory and rate equation modelling.
Learning Outcomes
At the end of the course, students should be familiar with the following:
 Electromagnetic fields and plane waves. Maxwell's equations; Derivation of the wave equation; Plane waves; Power flow  Reflection and refraction at an interface. Boundary matching; The dielectric interface problem; Reflection coefficients.  The slab waveguide. Metal walled and dielectric guides; Basic properties of guided and radiation modes.  Channel waveguide integrated optics. Channel guides; Yjunctions, Phase modulators.  Optoelectronic interactions in semiconductors. Basic properties of semiconductors; Materials for optoelectronics; Rate equations  Optoelectronic devices. PN junction diodes; Heterojunctions; Photodiodes; LEDS; semiconductor lasers Syllabus
Maxwell's equations; the wave equation for electromagnetic waves; evanescent waves; power flow. Waveguide structures: boundary matching, slab dielectric waveguide; guided and radiation modes; cutoff conditions; free carrier contribution to the dielectric constant; waveguides in semiconductors  homostructure and heterostructure guides; epitaxy and lattice matching; channel waveguides. Channel waveguide devices; power splitters; filters. Diodebased waveguide structures: homojunctions and heterojunctions; carrier injection phase modulators; electrooptic phase modulators; switches and intensity modulators. Photodetectors: absorption of light by semiconductors; quantum efficiency; photoconductive detectors; pin photodiodes; heterojunction photodiodes. LEDs: spontaneous and stimulated emission; electroluminescence in pn junctions; simple LED structures; emission spectrum of LED; DC efficiency and frequency response of LED; ELEDs. Semiconductor lasers: conditions for laser oscillation; inversion and optical gain; emission spectrum of laser; the double heterostructure; threshold condition and powercurrent characteristics.
Exam Duration: 3:00hrs Coursework contribution: 0% Term: Autumn Closed or Open Book (end of year exam): Closed Coursework Requirement: To be announced Oral Exam Required (as final assessment): N/A Prerequisite module(s): None required Course Homepage: https://bb.imperial.ac.uk Book List:
