Functional laser-induced damage threshold of aluminum coating deposited by magnetron sputtering with different power supply modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F10974938%3A_____%2F25%3A25_91_02" target="_blank" >RIV/10974938:_____/25:25_91_02 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10505298

Výsledek na webu

<a href="https://doi.org/10.1063/5.0295260" target="_blank" >https://doi.org/10.1063/5.0295260</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0295260" target="_blank" >10.1063/5.0295260</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Functional laser-induced damage threshold of aluminum coating deposited by magnetron sputtering with different power supply modes

Popis výsledku v původním jazyce

The need for high-power, high-intensity laser facilities has driven the scientific community to develop optics capable of withstanding higher fluences. The main challenge in increasing power levels is the limited damage threshold of optics. In this paper, we report the laser-induced damage threshold (LIDT) of aluminum coatings deposited via magnetron sputtering. Aluminum coatings (150 nm) were investigated as 45 degrees s-polarization mirrors, a geometry widely employed for beam steering in high-power laser systems. The coatings were produced using three plasma techniques: direct-current (DCMS), radiofrequency (RFMS), and high-power impulse (HiPIMS). Our results show that the RFMS coating is rougher than the DCMS and HiPIMS coatings, which affects its reflectance efficiency (at 45 degrees in s-polarization), even at 1060 nm, decreasing from 96% for DCMS and HiPIMS to 91% for RFMS. 1k-on-1 LIDT tests using a femtosecond laser beam (110 fs) at 1060 nm demonstrate that coatings deposited by HiPIMS and DCMS withstand higher fluences (0.260 J/cm(2)) compared to RFMS (0.112 J/cm(2)). Finally, the LIDT performance was compared with the Functional LIDT (F-LIDT), defined as the incident fluence at which the reflected beam decreases by less than 5%. In this study, we observed a discrepancy between the 1k-on-1 LIDT and the F-LIDT values for DCMS and HiPIMS. The F-LIDT for DCMS was higher (0.288 J/cm(2)) than that of HiPIMS (0.232 J/cm(2)), which may be partly attributed to the larger crystallite size observed in DCMS. Additionally, the potential use of the HiPIMS power supply mode for developing high-performance optical coatings is discussed.

Název v anglickém jazyce

Functional laser-induced damage threshold of aluminum coating deposited by magnetron sputtering with different power supply modes

Popis výsledku anglicky

The need for high-power, high-intensity laser facilities has driven the scientific community to develop optics capable of withstanding higher fluences. The main challenge in increasing power levels is the limited damage threshold of optics. In this paper, we report the laser-induced damage threshold (LIDT) of aluminum coatings deposited via magnetron sputtering. Aluminum coatings (150 nm) were investigated as 45 degrees s-polarization mirrors, a geometry widely employed for beam steering in high-power laser systems. The coatings were produced using three plasma techniques: direct-current (DCMS), radiofrequency (RFMS), and high-power impulse (HiPIMS). Our results show that the RFMS coating is rougher than the DCMS and HiPIMS coatings, which affects its reflectance efficiency (at 45 degrees in s-polarization), even at 1060 nm, decreasing from 96% for DCMS and HiPIMS to 91% for RFMS. 1k-on-1 LIDT tests using a femtosecond laser beam (110 fs) at 1060 nm demonstrate that coatings deposited by HiPIMS and DCMS withstand higher fluences (0.260 J/cm(2)) compared to RFMS (0.112 J/cm(2)). Finally, the LIDT performance was compared with the Functional LIDT (F-LIDT), defined as the incident fluence at which the reflected beam decreases by less than 5%. In this study, we observed a discrepancy between the 1k-on-1 LIDT and the F-LIDT values for DCMS and HiPIMS. The F-LIDT for DCMS was higher (0.288 J/cm(2)) than that of HiPIMS (0.232 J/cm(2)), which may be partly attributed to the larger crystallite size observed in DCMS. Additionally, the potential use of the HiPIMS power supply mode for developing high-performance optical coatings is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/EH22_008%2F0004591" target="_blank" >EH22_008/0004591: Feroické multifunkcionality</a><br>

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

1089-7550

Svazek periodika

138

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

1

Strana od-do

173105

Kód UT WoS článku

001609831300001

EID výsledku v databázi Scopus

2-s2.0-105020970032