| Title |
High diffraction efficiency periodic microstructures for optical wavelength range: from modelling to implementation / |
| Translation of Title |
Didelio difrakcinio efektyvumo optiniam bangos ilgių diapazonui skirtų periodinių mikrostruktūrų modeliavimas ir realizacija. |
| Authors |
Žutautas, Andrius |
| Full Text |
|
| Pages |
124 |
| Keywords [eng] |
multilayer dielectric structures ; diffraction gratings ; high power lasers ; ultra-short pulses |
| Abstract [eng] |
The creation of a laser was a very significant leap in technology, and various new applications of light emerged. Lasers are used everywhere from domestic to military applications. This huge interest in laser-related research and laser device adaptability for many different technological and research prospects imparted demand for new qualities, such as increasing power and energy density levels, ultrashort laser pulses, innovative light amplification solutions, opened possible new applications. One of the biggest research leaps in the laser technology came when chirped pulse amplification systems were developed. These systems increased laser power output exponentially. The main optical component of these systems is a diffraction grating because pairs of them are used for pulse temporal and spatial stretching and compression before and after the light amplification procedure so the gain medium will not be damaged. Dissertation is focused around finding a near unit diffraction efficiency optical devices geometries which are formed on several types of commercially available high reflectivity multilayer dielectric mirror stacks with the use of rigorous coupled wave analysis modelling and the modelled structure geometry realisation on these mirrors employing a formed rigorous experimental regime which includes deep reactive ion etching and electron beam lithography. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Doctoral thesis |
| Language |
English |
| Publication date |
2023 |
