Sökning: "Optical rectification"

Hittade 4 uppsatser innehållade orden Optical rectification.

1. 1. Towards a setup for narrowband terahertz generation through difference-frequency mixing of chirped ultrashort pulses

   Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Isa Clementsson; [2023]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : Terahertz radiation is a useful tool for inducing lower-energy excitations in matter, where it can be used to cause structural changes through direct interaction with the crystal lattice. Sub-picosecond optical pulses can be used to generate intense broadband terahertz pulses through optical rectification in nonlinear crystals, reaching peak electric fields of several MV/m and conversion efficiencies as high as a few percent. LÄS MER

3. 2. Characterization of Terahertz Radiation Generated in an Organic Crystal

   Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Åsa Bengtsson; [2016]
   Nyckelord :Nonlinear optics; Terahertz radiation generation; Optical rectification; Difference frequency generation; Organic crystal; DSTMS; Physics and Astronomy;

   Sammanfattning : The terahertz region of the electromagnetic spectrum is an important research area allowing insights into fundamental science such as inter-molecular interactions, and with applications in the environmental, medical and security field. Using femtosecond lasers, it is possible to design compact and efficient terahertz generation schemes, resulting in few-cycle broadband pulses. LÄS MER

4. 3. Generation of Short Intense Terahertz pulses Through Optical Rectification

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Carl Ekström; [2015]
   Nyckelord :Terahertz; THz; Optical Rectification; OR; Photonics; Optics; LiNbO3; Physics and Astronomy; Technology and Engineering;

   Sammanfattning : The lack of sources that generates intense THz pulses have in many years limited the field of THz science. Until recently intense THz pulses have been hard to generate using nonlinear crystals such as Lithium Niobate (LiNbO3) with high efficiency. LÄS MER

5. 4. Characterization of doped GaInP nanowires for photovoltaics

   Magister-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Författare :Laura Barrutia; [2011]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : The interest in renewable energy sources has increased recently, which has resulted in increasing research in solar energy as an environmentally friendly way to obtain electricity due to a rising energy consumption and an arising environmental awareness. Direct harvesting of solar energy to electricity is called photovoltaics, where III-V semiconductors nanowires can be used to fabricate multijunction solar cells with promise to deliver high efficiency at low cost. LÄS MER