Skip to Main content Skip to Navigation
Theses

Structures quasi-accord de phase 3D : étude théorique, élaboration de matériaux non-linéaires, et réalisation des structures en matériau polymère

Abstract : In this study, we investigate theoretically and experimentally 3D quasi-phase matching (QPM) structures. The work focuses on i) mathematical analysis of second-harmonic generation efficiency in 3D QPM lattices, ii) synthesis and analysis of polymers materials with embedded nonlinear submicron particles for fabrication of nonlinear lattices, iii) development of methods for creation of nonlinear 2D and 3D QPM lattices. The purpose of the theoretical part is to define the influence of different parameters of 3D QPM structures on the efficiency of the frequency conversion. In order to conduct our experimental research, we then synthesis two composite materials which consist of polymer matrices with embedded nonlinear submicron DAST crystals. Using these materials, we are capable of creating novel methods of fabrication of 2D and 3D QPM structures. The first method consists of holographically writing a photopolymerizable composite, during which the nonlinear DAST crystals are transferred into the dark zones of the interference pattern. The second method employs the direct laser writing technique to patterning the submicron DAST crystals embedded in polymer matrices, by the photothermal destruction effect. Finally, the third method allows creation of 2D nonlinear lattices by filling voids of SU-8 template with submicrometer DAST crystals.
Document type :
Theses
Complete list of metadatas

Cited literature [78 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02884121
Contributor : Abes Star :  Contact
Submitted on : Monday, June 29, 2020 - 4:36:10 PM
Last modification on : Saturday, October 3, 2020 - 4:22:18 AM

File

72675_POGOSIAN_2020_archivage....
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02884121, version 1

Citation

Tamara Pogosian. Structures quasi-accord de phase 3D : étude théorique, élaboration de matériaux non-linéaires, et réalisation des structures en matériau polymère. Physique [physics]. Université Paris-Saclay; ITMO University, 2020. Français. ⟨NNT : 2020UPASN007⟩. ⟨tel-02884121⟩

Share

Metrics

Record views

130

Files downloads

32