A Thz modulator use the photo-carrier surface plasma effect

Pengfei Yang; Jianquan Yao; Zhigang Di; Pibin Bing; Peng Wang

doi:10.1117/12.868890

4 November 2010 A Thz modulator use the photo-carrier surface plasma effect

Pengfei Yang, Jianquan Yao, Zhigang Di, Pibin Bing, Peng Wang

Proceedings Volume 7854, Infrared, Millimeter Wave, and Terahertz Technologies; 78542M (2010) https://doi.org/10.1117/12.868890
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

A design of light modulator for THz amplitude and phase modulations has been presented in this paper. Simplest versus of the Drude model is adopted, in which the collision damping is independent of the carrier energy. In our experiment, we use THz-TDS as THz source and detector. A laser whose wavelength is 808nm was used to irradiate the intrinsic Si(high-resistance), so as to let it generate the Photo-carriers ,and to influence the conductance . The Photo-carriers will change the absorption coefficient of the THz wave and also influence the dielectric of the sample, hence to control the characteristics of the THz wave in the silicon . By changing the light intensity , due to the different photon-generated carrier concentration ,the single transmission of the THz wave in the silicon wafer sample is changing remarkable . Theoretically, the modulation depth can be more than 80%. we present our design of light modulator for THz, and show the Digital simulation of our design. Also, according to this design theory, Optical/electronic integrated modulation of THz can be realized, that will be our future work.

Citation Download Citation

Pengfei Yang, Jianquan Yao, Zhigang Di, Pibin Bing, and Peng Wang "A Thz modulator use the photo-carrier surface plasma effect", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542M (4 November 2010); https://doi.org/10.1117/12.868890

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