Linearity of a silicon carbide photodiode in the deep-UV spectral region: implications on Doppler broadening thermometry

被引：5

作者：

Dinesan, Hemanth ^{[1
]}

Gravina, Stefania ^{[1
]}

Clivati, Cecilia ^{[2
]}

Castrillo, Antonio ^{[1
]}

Levi, Filippo ^{[2
]}

Gianfrani, Livio ^{[1
,3
]}

机构：

[1] Univ Campania Luigi Vanvitelli, Dipartimento Matemat & Fis, Caserta, Italy

[2] Ist Nazl Ric Metrol, INRiM, Turin, Italy

[3] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

来源：

METROLOGIA | 2020年 / 57卷 / 06期

关键词：

silicon carbide detectors; linear responsivity; deep-UV radiation; FREQUENCY COMB; DETECTOR; RATIO;

D O I：

10.1088/1681-7575/aba052

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The linearity of the responsivity of a silicon carbide photodetector in the deep-ultraviolet has been studied using a variant of the so-called intensity-ratio method in view of the implementation of low-uncertainty Doppler-broadening thermometry in mercury vapours. To this purpose, coherent radiation at the wavelength of 254 nm has been produced by means of non-linear mixing of two visible laser beams in a beta-barium borate crystal. The linearity has been quantified as a function of the exposure power, variable in the range between 50 and 300 nW. It is shown that possible deviations from linearity are within the uncertainty of 4 x 10(-5)(corresponding to one standard deviation). Such a performance makes the detector well suitable for the thermometric application.

引用

页数：6