Anti-Stokes/Stokes temperature calibration and its application in laser-heating diamond anvil cells  

作　　者：赵旻旻 吴彬彬 刘静仪 雷力 Minmin Zhao;Binbin Wu;Jingyi Liu;Li Lei(Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China)

机构地区：[1]Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Physics B》2023年第9期51-59,共9页中国物理B（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.U2030107);the Fundamental Research Funds for the Central Universities(Grant No.2020SCUNL107)。

摘　　要：Anti-Stokes/Stokes Raman peak intensity ratio was used to infer sample temperatures,but the influence factors of system correction factors were not clear.Non-contact in-situ anti-Stokes/Stokes temperature calibration was carried out for up to 1500 K based on six different samples under two excitation light sources(±50 K within 1000 K,±100 K above1000 K),and the system correction factorγwas systematically investigated.The results show that the correction factorγof anti-Stokes/Stokes thermometry is affected by the wavelength of the excitation light source,Raman mode peak position,temperature measurement region and other factors.The anti-Stokes/Stokes thermometry was applied to the laser-heating diamond anvil cell(LHDAC)experiment to investigate the anharmonic effect of h BN under high temperature and high pressure.It is concluded that the strong anharmonic effect caused by phonon scattering at low pressure gradually changes into the predominance of localized molecular lattice thermal expansion at high pressure.

关 键 词：Stokes/anti-Stokes Raman spectroscopy temperature calibration laser-heating diamond anvil cell(LHDAC) anharmonic effect 

分 类 号：O56[理学—原子与分子物理] TN249[理学—物理]