Theoretical studies of polarization dependent electro-optical modulation in lattice matched and strained multi-quantum well structures

Theoretical Studies of Polarization Dependent Electro-optical Modulation in Latticis Matched and Strained Multi-quantum Well Structures

We report on polarization dependent optical absorption for excitonic and interband transitions in lattice matched (GaAs/AlGaAs) and strained (biaxial tensile strain GaAsP/AlGaAs; biaxial compressive strain InGaAs/AlGaAs) multiquantum well structures in the presence of transverse electric fields. The hole states are solved by using the Kohn-Luttinger Hamiltonian and using an eigenvalue technique...

The Effects of Strained Multiple Quantum Well on the Chirped DFB-SOA All Optical Flip-Flop

In this paper, based on the coupled-mode and carrier rate equations, a dynamic model and numerical analysis of a multi quantum well (MQW) chirped distributed feedback semiconductor optical amplifier (DFB-SOA)  all-optical flip-flop is precisely derived. We have analyzed the effects of strains of QW and MQW and cross phase modulation (XPM) on the dynamic response, and rise and fall times of the ...

Novel electro-optical phase modulator based on GaInAs/InP modulation-doped quantum-well structures

Theoretical studies of optical transitions in semiconductor quantum structures

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Osmo Vänskä Name of the doctoral dissertation Theoretical studies of optical transitions in semiconductor quantum structures Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 214/2014 Field of research Electrophysics Manuscript ...

Optical ASK and FSK Modulation By Using Quantum Well Transistor Lasers

In this paper, transistor lasers (TLs) are used as an optical modulator for generation of ASK(Amplitude Shift Keying) and FSK (Frequency Shift Keying) optical signals. Our analysis is based on continuity equation, rate equations, and the theory of discontinuity of quasi-fermi level at the abrupt junction. Our simulation results indicate that, the specification of ASK and FSK optical signals, ar...