Application of time-resolved pump-probe system in researching photoconductive material

Zhenmin Shen; Tian Lan

doi:10.1117/12.900843

22 August 2011 Application of time-resolved pump-probe system in researching photoconductive material

Zhenmin Shen, Tian Lan

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 819238 (2011) https://doi.org/10.1117/12.900843
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

The transient electrical signal generated by ultrafast photoconductive material irradiated by ultrashort pulse laser is measured by the time-resolved pump-probe system. The usual pump-probe experimental setup is used to study dynamic change inside the material by measuring the change of the laser beam reflectivity or transmisivity. In this paper, the experimental setup is improved to directly measure transient electrical signals generated by photoconductive material. The improved experimental setup can directly reflect the carrier status inside the photoconductive material compared to the usual experimental setup, and the response rate of photoconductive material can be studied by measuring the transient electrical signal. The work process of the experimental measurement is described. Especially the detection process of the pump-probe is analyzed in detail. The method of determining the zero of delay time of the experimental system is presented. The measurement results showed that the width of transient electrical signals measured is on the level of picosecond. Finally, the signal to noise ratio (SNR) of the improved experimental setup has been analyzed.

Citation Download Citation

Zhenmin Shen and Tian Lan "Application of time-resolved pump-probe system in researching photoconductive material", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 819238 (22 August 2011); https://doi.org/10.1117/12.900843

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available