Optical properties of as-deposited, annealed and laser-treated Ge2Sb2Te5 thin films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39919077" target="_blank" >RIV/00216275:25310/22:39919077 - isvavai.cz</a>

Výsledek na webu

<a href="https://opg.optica.org/ome/fulltext.cfm?uri=ome-12-7-2927&id=477519" target="_blank" >https://opg.optica.org/ome/fulltext.cfm?uri=ome-12-7-2927&id=477519</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OME.462278" target="_blank" >10.1364/OME.462278</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optical properties of as-deposited, annealed and laser-treated Ge2Sb2Te5 thin films

Popis výsledku v původním jazyce

Knowledge of the correct optical properties of phase change materials (PCM) is important in the development of many devices. Here, we report on the differences in optical properties of as-deposited, annealed, laser-reamorphized and laser-recrystallized Ge2Sb2Te5 thin films. While as-deposited and laser-reamorphized Ge2Sb2Te5 show a similar spectral dependences of refractive indices and extinction coefficients with a small decrease in optical band gap from 0.63 to 0.59 eV, spectral dependences of annealed and laser-recrystallized Ge2Sb2Te5 differ significantly from each other in the entire measured spectral region with values of optical band gap 0.51 and 0.45 eV, respectively. We discuss the main differences in the optical functions between both crystalline phases using X-ray diffraction studies. We further present that the laser-reamorphized phase transforms to the crystalline phase at about 12 degrees C lower temperature in contrast to the as-deposited amorphous phase. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Název v anglickém jazyce

Optical properties of as-deposited, annealed and laser-treated Ge2Sb2Te5 thin films

Popis výsledku anglicky

Knowledge of the correct optical properties of phase change materials (PCM) is important in the development of many devices. Here, we report on the differences in optical properties of as-deposited, annealed, laser-reamorphized and laser-recrystallized Ge2Sb2Te5 thin films. While as-deposited and laser-reamorphized Ge2Sb2Te5 show a similar spectral dependences of refractive indices and extinction coefficients with a small decrease in optical band gap from 0.63 to 0.59 eV, spectral dependences of annealed and laser-recrystallized Ge2Sb2Te5 differ significantly from each other in the entire measured spectral region with values of optical band gap 0.51 and 0.45 eV, respectively. We discuss the main differences in the optical functions between both crystalline phases using X-ray diffraction studies. We further present that the laser-reamorphized phase transforms to the crystalline phase at about 12 degrees C lower temperature in contrast to the as-deposited amorphous phase. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/LM2018103" target="_blank" >LM2018103: Výzkumná infrastruktura CEMNAT</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Optical Materials Express

ISSN

2159-3930

e-ISSN

2159-3930

Svazek periodika

12

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

2927-2937

Kód UT WoS článku

000827158600011

EID výsledku v databázi Scopus

2-s2.0-85135057663