Rewritable and Tunable Laser-Induced Optical Gratings in Phase-Change Material Films.
| Title: | Rewritable and Tunable Laser-Induced Optical Gratings in Phase-Change Material Films. |
|---|---|
| Authors: | Trofimov PI; School of Physics and Engineering, ITMO University, 197101 St. Petersburg, Russia.; Bessonova IG; School of Physics and Engineering, ITMO University, 197101 St. Petersburg, Russia.; Lazarenko PI; National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia.; Kirilenko DA; Ioffe Institute, 194021 St. Petersburg, Russia.; Bert NA; Ioffe Institute, 194021 St. Petersburg, Russia.; Kozyukhin SA; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia.; Sinev IS; School of Physics and Engineering, ITMO University, 197101 St. Petersburg, Russia. |
| Source: | ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2021 Jul 14; Vol. 13 (27), pp. 32031-32036. Date of Electronic Publication: 2021 Jun 30. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 101504991 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1944-8252 (Electronic) Linking ISSN: 19448244 NLM ISO Abbreviation: ACS Appl Mater Interfaces Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Washington, D.C. : American Chemical Society |
| Abstract: | Laser-induced periodic surface structures (LIPSS) can be fabricated in virtually all types of solid materials and show great promise for efficient and scalable production of surface patterns with applications in various fields from photonics to engineering. While the majority of LIPSS manifest as modifications of the surface relief, in special cases, laser impact can also lead to periodic modulation of the material phase state. Here, we report on the fabrication of high-quality periodic structures in the films of phase-change material Ge2Sb2Te5 (GST). Due to considerable contrast of the refractive index of GST in its crystalline and amorphous states, the fabricated structures provide strong spatial modulation of the optical properties, which facilitates their applications. By changing the excitation laser wavelength, we observe the scaling of the grating period as well as transition between formation of different types of LIPSS. We optimize the laser exposure routine to achieve large-scale high-quality phase-change gratings with controllable period and demonstrate their reversible tunability through intermediate amorphization steps. Our results reveal the prospects of fast and rewritable fabrication of high-quality periodic structures for photonics and can serve as a guideline for further development of phase-change material-based optical elements. |
| Contributed Indexing: | Keywords: GST; femtosecond laser pulses; laser-induced periodic surface structures; optical gratings; phase-change materials |
| Entry Date(s): | Date Created: 20210630 Latest Revision: 20210715 |
| Update Code: | 20260130 |
| DOI: | 10.1021/acsami.1c08468 |
| PMID: | 34191479 |
| Database: | MEDLINE |
Journal Article