Open AccessRESEARCH ABOUT SCREEN-RELIEF MEASURES FOR LiNbO3 SURFACE POTENTIAL
Author(s) -
Shanshan Yu
Publication year - 1991
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.40.646
Subject(s) - wiggler , free electron model , undulator , electron , conductor , polarization (electrochemistry) , laser , insulator (electricity) , materials science , optics , free electron laser , physics , crystal (programming language) , condensed matter physics , optoelectronics , cathode ray , chemistry , quantum mechanics , composite material , computer science , programming language
The strong periodic surface electric strength caused by spontaneous polarization may be used as an undulator instead of Wiggler magnet to produce free electron laser. But the free electrons falling on it screen the potential gradually.Some screen-relif measures are proposed in this paper. Every positive polarized domain on the polarized crystal surface of LiNbO3 is covered with a piece of insulator film and covered further with an earthed conductor film to protect this polarized crystal surface from electric screening by free electrons. It is proved that the sum of induced charges on two surfaces of each part in these conductor films is zero. The free electrons falling on it will escape into the Earth at once.