| Title |
Measurement of optical refractive index for 3d microcomponents / |
| Translation of Title |
3D mikrokomponentų optinio lūžio rodiklio matavimas. |
| Authors |
Gonzalez Hernandez, Diana Laura |
| Full Text |
|
| Pages |
48 |
| Keywords [eng] |
micro-optics, two-photon lithography, refractive index, characterization of microstructures |
| Abstract [eng] |
The two-photon lithography (TPL) technique has been widely used for the fabrication ofmicroelements for optical applications where the understanding of the refractive index (RI) ofthe material is fundamental. Different techniques allows the measurements of the RI of thematerial but they limit the dimension of the structures to 2D. Two techniques are presentedfor RI measurements of 3D microelements fabricated by TPL: index-matching (IM) oils andfocal length measurements. The fabrication of microcuboids and spherical microlenses out ofSZ2080™ by TPL. The IM oils method showed different values of RI dependent on illuminationwavelength (VIS - IR range) and exposure dose during fabrication by TPL with RI in the rangeof 1.505 to 1.535 which differs from the RI presented in literature (n=1.504) for SZ2080™ at632.8 nm for single-photon polymerization. The microlenses present a high resolving powerof 7μmwith an optical performance suitable for optical applications. The RI experimentalvalues from focal length measurements confirm the dependency of the RI on exposure doseduring TPL fabrication process. The result of this work shows the RI dependency on exposuredose and geometry and concedes the possibility of the design and fabrication of 4D printingof free form micro elements and stacked components out of a single hybrid organic-inorganicprepolymer material. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Master thesis |
| Language |
English |
| Publication date |
2021 |
