Semiconductors and device applications & Light and Photonic Devices

Formation of energy bands, E-k diagrams, direct and indirect band gaps, effective mass.
Charge carriers in semiconductors, density of states, carrier distributions.
Intrinsic/extrinsic semiconductors, doping, carrier density.
Transport of carriers: drift and diffusion, mobility and basic scattering processes. Generation, recombination of charges. Radiative recombination and light emission. Non radiative recombination. ❑ Detailed operation of a p-n junction, diode equation and applications of p-n junctions in devices. ❑ Electrodes and contacts in semiconducting devices.
Light emitting diodes (LEDs).
Photovoltaic (PV) devices and solar energy conversion: Detailed operation, current-voltage characteristics. Strategies to improve conversion efficiencies. Emerging Photovoltaic technologies. ❑Display devices: Liquid crystal, Organic light emitting diode, E-paper.
Part B Light and Photonic Devices
Wave theory of light, polarization Interference and diffraction
Refraction and dispersion
Reflection and absorption
Light propagation, waveguiding
Fabry-Pérot resonator, longitudinal modes
Spontaneous and stimulated emission
Gain and amplifiers
Basics of lasers, operational principles
Detectors