Sökning: "infrarött"
Visar resultat 1 - 5 av 22 avhandlingar innehållade ordet infrarött.
1. Studier av atomspektra i infrarött
Sammanfattning : [abstract missing].... LÄS MER
2. Quantitative Modeling of Gain in Quantum Cascade Lasers under Operational Intensities
Sammanfattning : This thesis adresses modeling of quantum cascade lasers using non-equilibrium Green’s functions. Focus lies on the quantitative modeling of the gain when the systems are exposed to strong laser fields, as under realistic opertional conditions. LÄS MER
3. Om stjärnor omgivna av gas och stoft samt om fotometri i infrarött av kalla stjärnor : en betraktelse
Sammanfattning : .... LÄS MER
4. Modeling Quantum Cascade Lasers : The Challenge of Infra-Red Devices
Sammanfattning : We live in a time of rapid scientific and technological advancement. People liv- ing 100 years ago could never dream of inventions like those having completely changed our way of life, and our perception of the world; computers, mobile phones, the Internet, space travel, unraveling the mysteries of the early universe and distant galaxies, and our insight into the microscopic world of quantum phe- nomena. LÄS MER
5. Attosecond Optical and Electronic Wave Packets
Sammanfattning : When a low-frequency laser pulse is focused to a high intensity in a gas, the electric field of the laser may become comparable to, or even exceed, the electric field between the electrons and the nucleus in the atom. Under such conditions, through a process known as high-order harmonic generation, bursts of extreme ultraviolet radiation may be emitted, with durations in the attosecond domain (1 as = 10^{-18} s), which is the time-scale of electronic processes. LÄS MER