Spintronic Terahertz Emitters with integrated metallic terahertz cavities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10254369" target="_blank" >RIV/61989100:27360/24:10254369 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/24:10254369 RIV/61989100:27740/24:10254369

Výsledek na webu

<a href="https://www.degruyter.com/document/doi/10.1515/nanoph-2023-0807/html" target="_blank" >https://www.degruyter.com/document/doi/10.1515/nanoph-2023-0807/html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/nanoph-2023-0807" target="_blank" >10.1515/nanoph-2023-0807</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spintronic Terahertz Emitters with integrated metallic terahertz cavities

Popis výsledku v původním jazyce

Spintronic terahertz emitters (STEs), basedon optical excitation of nanometer thick ferromagnetic/heavy metal (FM/HM) heterojunctions, have becomeimportant sources for the generation of terahertz(THz) pulses. However, the efficiency of the opticalto-THz conversion remains limited. Although opticaltechniques have been developed to enhance the opticalabsorption, no investigations have studied the applicationof THz cavities. Here, to enhance the THzefficiency of STEs in a selected THz spectral range,FM/HM structures are realised on ultra-thin sapphirelayers with metallic mirrors to create ????/4 THz resonantcavities. THz emission time domain spectroscopyof these STE/Sapphire/Mirror heterostructures, withsapphire thicknesses ranging from 110 μm to 25 μm,shows enhancement of the emitted THz field that fitsthe ????/4 cavity resonance with up to a doubling of thefield in the spectrum, and in agreement with temporalsimulations of the emitted THz pulse. By taking advantage of birefringent materials, we further showthe potential of control of the polarisation state of theemitted THz pulse. This work shows the potential ofenhancing and engineering THz emission from STEsusing THz cavities that can be controlled over a broadspectral range, and which can be easily combined withoptical cavities.

Název v anglickém jazyce

Spintronic Terahertz Emitters with integrated metallic terahertz cavities

Popis výsledku anglicky

Spintronic terahertz emitters (STEs), basedon optical excitation of nanometer thick ferromagnetic/heavy metal (FM/HM) heterojunctions, have becomeimportant sources for the generation of terahertz(THz) pulses. However, the efficiency of the opticalto-THz conversion remains limited. Although opticaltechniques have been developed to enhance the opticalabsorption, no investigations have studied the applicationof THz cavities. Here, to enhance the THzefficiency of STEs in a selected THz spectral range,FM/HM structures are realised on ultra-thin sapphirelayers with metallic mirrors to create ????/4 THz resonantcavities. THz emission time domain spectroscopyof these STE/Sapphire/Mirror heterostructures, withsapphire thicknesses ranging from 110 μm to 25 μm,shows enhancement of the emitted THz field that fitsthe ????/4 cavity resonance with up to a doubling of thefield in the spectrum, and in agreement with temporalsimulations of the emitted THz pulse. By taking advantage of birefringent materials, we further showthe potential of control of the polarisation state of theemitted THz pulse. This work shows the potential ofenhancing and engineering THz emission from STEsusing THz cavities that can be controlled over a broadspectral range, and which can be easily combined withoptical cavities.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Nanophotonics

ISSN

2192-8606

e-ISSN

2192-8614

Svazek periodika

13

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

"1899 "- 1907

Kód UT WoS článku

001178542000001

EID výsledku v databázi Scopus

2-s2.0-85187112995