Evolution of femtosecond laser damage in a hafnia-silica multi-layer dielectric coating

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00522224" target="_blank" >RIV/68378271:_____/19:00522224 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/19:00522224

Výsledek na webu

<a href="https://doi.org/10.1364/ol.44.005342" target="_blank" >https://doi.org/10.1364/ol.44.005342</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OL.44.005342" target="_blank" >10.1364/OL.44.005342</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of femtosecond laser damage in a hafnia-silica multi-layer dielectric coating

Popis výsledku v původním jazyce

To optimize optical coating materials, designs, and technologies for high damage resistance, understanding the growth of laser damage is of paramount importance. In this Letter, we show the evolution of femtosecond laser damage in a hafnia–silica (HfO2/SiO2) multilayer dielectric mirror coating. Depending on various spatial features of damaged sites, we identified several regimes of the laser–material interaction with varying laser fluence and incident number of pulses. A change in surface roughness has been observed only for a small number of pulses, and interestingly, a threshold number of pulses is found for nanocrack formation. We report the polarization-dependent orientation of nanocracks and their growth with an increasing number of pulses. The presented results demonstrate that the laser damage originates from the nanobumps and surface roughening, which then leads to the formation of nanocracks. The presented experimental results acknowledge the existing theoretical models..

Název v anglickém jazyce

Evolution of femtosecond laser damage in a hafnia-silica multi-layer dielectric coating

Popis výsledku anglicky

To optimize optical coating materials, designs, and technologies for high damage resistance, understanding the growth of laser damage is of paramount importance. In this Letter, we show the evolution of femtosecond laser damage in a hafnia–silica (HfO2/SiO2) multilayer dielectric mirror coating. Depending on various spatial features of damaged sites, we identified several regimes of the laser–material interaction with varying laser fluence and incident number of pulses. A change in surface roughness has been observed only for a small number of pulses, and interestingly, a threshold number of pulses is found for nanocrack formation. We report the polarization-dependent orientation of nanocracks and their growth with an increasing number of pulses. The presented results demonstrate that the laser damage originates from the nanobumps and surface roughening, which then leads to the formation of nanocracks. The presented experimental results acknowledge the existing theoretical models..

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Optics Letters

ISSN

0146-9592

e-ISSN

—

Svazek periodika

44

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

5342-5345

Kód UT WoS článku

000493940500061

EID výsledku v databázi Scopus

2-s2.0-85074320091