Hot-carrier transport in diamond controlled by femtosecond laser pulses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10314722" target="_blank" >RIV/00216208:11320/15:10314722 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1367-2630/17/5/053027" target="_blank" >http://dx.doi.org/10.1088/1367-2630/17/5/053027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1367-2630/17/5/053027" target="_blank" >10.1088/1367-2630/17/5/053027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hot-carrier transport in diamond controlled by femtosecond laser pulses

Popis výsledku v původním jazyce

A laser-induced transient grating technique with femtosecond temporal resolution was used for the study of hot-carrier diffusion and anisotropy of an ambipolar diffusion coefficient in monocrystalline diamond. Ahot-carrier transport regime observed at temperatures below 200 K and excited carrier densities lower than 10(16) cm(-3) persist in the sample 20-30 ps after photoexcitation. Measured drift velocity of hot carriers was approximately 4-8 times higher compared to thermalized carriers. At low sampletemperatures and excited carrier densities, the ambipolar diffusion coefficient was found to be anisotropic between < 100 > and < 110 > crystallographic directions. We demonstrated experimentally that the carrier energy distribution can be controlled ona sub-picosecond timescale by an additional laser pulse with photon energy below the width of a diamond band gap absorbed by the excited carrier system. Our experimental data were reproduced well by Monte Carlo simulations that confirm t

Název v anglickém jazyce

Hot-carrier transport in diamond controlled by femtosecond laser pulses

Popis výsledku anglicky

A laser-induced transient grating technique with femtosecond temporal resolution was used for the study of hot-carrier diffusion and anisotropy of an ambipolar diffusion coefficient in monocrystalline diamond. Ahot-carrier transport regime observed at temperatures below 200 K and excited carrier densities lower than 10(16) cm(-3) persist in the sample 20-30 ps after photoexcitation. Measured drift velocity of hot carriers was approximately 4-8 times higher compared to thermalized carriers. At low sampletemperatures and excited carrier densities, the ambipolar diffusion coefficient was found to be anisotropic between < 100 > and < 110 > crystallographic directions. We demonstrated experimentally that the carrier energy distribution can be controlled ona sub-picosecond timescale by an additional laser pulse with photon energy below the width of a diamond band gap absorbed by the excited carrier system. Our experimental data were reproduced well by Monte Carlo simulations that confirm t

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-12386S" target="_blank" >GA13-12386S: Fotovodivost a dynamika excitací v nanostrukturovaných a neuspořádaných polovodičích na ultrarychlé časové škále</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

New Journal of Physics

ISSN

1367-2630

e-ISSN

—

Svazek periodika

17

Číslo periodika v rámci svazku

18 May 2015

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000355280200003

EID výsledku v databázi Scopus

2-s2.0-84930006345