Essays about: "semiconductor lasers"

Showing result 1 - 5 of 21 essays containing the words semiconductor lasers.

1. 1. Laser dazzling of CMOS imaging sensors using amplitude modulated and continuous wave lasers

   University essay from Umeå universitet/Institutionen för fysik

   Author : Johan Fjellström; [2023]
   Keywords : ;

   Abstract : Protecting sensitive information is important, especially in defence applications. As cameras become more common, developing countermeasure systems that limit the information gathering capabilities of imaging sensors would be beneficial. READ MORE

3. 2. Simulation of Quantum Cascade Lasers

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

   Author : Zakaria Mohamed; [2023]
   Keywords : Quantum Cascade Lasers; Simulations; Numerical Methods; Computational Models; Heterostructures; Physics and Astronomy;

   Abstract : This thesis aimed to contribute to the improvement of Quantum Cascade Lasers (QCLs) by focusing on the effective determination of quantum levels in these devices. The current method relies on an outdated Fortran code, which poses challenges when integrating into optimization schemes. READ MORE

4. 3. Doping Layers in Quantum Cascade Lasers: A study in doping density, position and migration effects

   University essay from Lunds universitet/Matematisk fysik

   Author : Josefin Reftlér; [2022]
   Keywords : Physics and Astronomy;

   Abstract : Quantum Cascade Lasers (QCLs) consist of several semiconductor materi- als sandwiched together. The QCL achieves stimulated emission in the mid-IR (m-IR) to the THz region of the electromagnetic spectrum by inter-subband transitions. These parts of the electromagnetic spectrum are hard to lase in with conventional means. READ MORE

5. 4. Synchrotrons as a Source for Soft X-Ray Lithography

   University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Author : Thomas Joseph Grandsaert Jr; [2021]
   Keywords : Physics and Astronomy;

   Abstract : To move to lower modes in extreme ultra-violet lithography (EUVL) technology (and keep up with Moore’s law), new sources of soft X-ray radiation must be developed. It is clear from previous studies that Free Electron Lasers (FELs) can easily meet the in-band power requirements at these lower wavelength modes, however detailed studies for insertion devices (undulators) as a soft X-ray lithography (SXL) source are due for a re-evaluation. READ MORE

6. 5. Optical studies of wrapgated InP nanowires

   University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

   Author : Henrik Torstensson; [2019]
   Keywords : Nanowire; InP; ITO; wrapgate; photoluminescence; interface states.; Physics and Astronomy;

   Abstract : This thesis describes optical spectroscopy on III-V semiconductor InP nanowires (NW) with a transparent indium-tin-oxide (ITO) gate electrode. The NWs are arranged both as vertical arrays with a wrap all around gate and as single lateral NWs with an omega-shaped gate for increased electrostatic effect. READ MORE