Comprehensive Analysis of the Temperature Dependence of Fe:ZnSe, Fe:ZnMnSe, and Fe:ZnMgSe Absorption Over the 4 – 400 K Range

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00386404" target="_blank" >RIV/68407700:21340/25:00386404 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1117/12.3073305" target="_blank" >https://doi.org/10.1117/12.3073305</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.3073305" target="_blank" >10.1117/12.3073305</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comprehensive Analysis of the Temperature Dependence of Fe:ZnSe, Fe:ZnMnSe, and Fe:ZnMgSe Absorption Over the 4 – 400 K Range

Popis výsledku v původním jazyce

The temperature dependence of Fe(2)⁺ ions in single crystals ZnSe, Zn1-xMnxSe (x ~ 0.2), and Cd1-xMnxTe (x ~ 0.375) was systematically investigated over a wide temperature range of 4-400 K, allowing for a detailed comparative analysis. The study focused on the structure of individual absorption peaks, examining temperature-induced variations in both the absolute values of the absorption coefficient and the full width at half maximum (FWHM) of the peaks. Two cryostats were used: one cooled with liquid helium (4-300 K) and the other with liquid nitrogen (77-400 K). Both were equipped with CaF2 windows to facilitate mid-infrared transmission measurements. The absorption spectrum reveals distinct line features that gradually broaden as the host temperature increases. At 4 K, the absorption spectrum of Fe:ZnSe exhibits several sharp zero-phonon lines corresponding to purely electronic transitions that occur without coupling to the lattice vibrations of the ZnSe host. On the contrary, much of the remaining absorption structure arises from phonon-assisted transitions, which are broadened because of phonon dispersion. Notably, these phonon-assisted transitions become the dominant contribution to the absorption spectrum at temperatures exceeding 30-40 K. In comparison to ZnSe, phonon-assisted transitions were dominant in the mixed host even at very low temperatures.

Název v anglickém jazyce

Comprehensive Analysis of the Temperature Dependence of Fe:ZnSe, Fe:ZnMnSe, and Fe:ZnMgSe Absorption Over the 4 – 400 K Range

Popis výsledku anglicky

The temperature dependence of Fe(2)⁺ ions in single crystals ZnSe, Zn1-xMnxSe (x ~ 0.2), and Cd1-xMnxTe (x ~ 0.375) was systematically investigated over a wide temperature range of 4-400 K, allowing for a detailed comparative analysis. The study focused on the structure of individual absorption peaks, examining temperature-induced variations in both the absolute values of the absorption coefficient and the full width at half maximum (FWHM) of the peaks. Two cryostats were used: one cooled with liquid helium (4-300 K) and the other with liquid nitrogen (77-400 K). Both were equipped with CaF2 windows to facilitate mid-infrared transmission measurements. The absorption spectrum reveals distinct line features that gradually broaden as the host temperature increases. At 4 K, the absorption spectrum of Fe:ZnSe exhibits several sharp zero-phonon lines corresponding to purely electronic transitions that occur without coupling to the lattice vibrations of the ZnSe host. On the contrary, much of the remaining absorption structure arises from phonon-assisted transitions, which are broadened because of phonon dispersion. Notably, these phonon-assisted transitions become the dominant contribution to the absorption spectrum at temperatures exceeding 30-40 K. In comparison to ZnSe, phonon-assisted transitions were dominant in the mixed host even at very low temperatures.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GA25-16282S" target="_blank" >GA25-16282S: Pevné látky dopované Fe: klíč k účinné generaci vysoce výkonného laserového záření ve střední infračervené oblasti</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 13698, Photonics, Devices, and Systems IX

ISBN

978-1-5106-9345-6

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

8

Strana od-do

—

Název nakladatele

The International Society for Optical Engineering (SPIE)

Místo vydání

Bellingham WA

Místo konání akce

Prague

Datum konání akce

9. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001723559900028