Guided Wave Optics and Photonic Devices

8	Semiconductor Light Sources and Detectors M. R. Shenoy Indian Institute of Technology Delhi

CONTENTS

8.1    Introduction

8.1.1    Energy Bands in Solids

8.1.2    E–k Diagram

8.1.3    Direct- and Indirect-Bandgap Semiconductors

8.1.4    Bandgap Energy and Wavelength

8.2    Semiconductor Optoelectronic Materials

8.2.1    Elemental and Binary Semiconductors

8.2.2    Ternary and Quaternary (Alloy) Semiconductors

8.2.3    Need for Ternary and Quaternary Compounds

8.3    p–n JUNCTION DEVICES

8.3.1    p–n Junction

8.3.2    Energy Band Diagram

8.3.3    Forward- and Reverse-Biased p–n Junctions

8.3.4    Quasi-Fermi Levels and Carrier Concentration

8.4    Semiconductor Lasers

8.4.1    Basic Structure and Working Principle

8.4.2    Double Heterostructure ...