Fundamental Mechanisms Of Photoconductivity In Magnesium Doped Lithium Niobate

Robert Gerson; J. F. Kirchhoff; L. E. Halliburton; D. A. Bryan

doi:10.1117/12.937182

10 March 1987 Fundamental Mechanisms Of Photoconductivity In Magnesium Doped Lithium Niobate

Robert Gerson, J. F. Kirchhoff, L. E. Halliburton, D. A. Bryan

Proceedings Volume 0704, Integrated Optical Circuit Engineering IV; (1987) https://doi.org/10.1117/12.937182
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

Abstract

Measurements on a variety of doped (magnesium and/or iron) and undoped lithium niobate crystals in the oxidized state demonstrate an Arrhenius dependence of electrical conductivity on reciprocal temperature between 460 and 590 degrees K. All of the crystals, regardless of doping, had roughly the same conductivity and activation energy (1.23 ev.) in this temperature range, implying that all of the crystals have about the same free carrier concentration and mobility. Based on these data a model is presented in which the enhanced photoconductivity of magnesium doped lithium niobate is attributed to a greatly increased free photoelectron lifetime, due to a correspondingly reduced trapping cross-section of Fe³⁺ for electrons. The smaller cross-section is due to a changed site for Fe³⁺ in magnesium doped crystals. Evidence for the new site is provided by ESR data. Photoconductivity measurements show that the trapping cross-section of Fe³⁺ for electrons in lithium niobate agrees satisfactorily with the value calculated from a simple theoretical model.

Citation Download Citation

Robert Gerson, J. F. Kirchhoff, L. E. Halliburton, and D. A. Bryan "Fundamental Mechanisms Of Photoconductivity In Magnesium Doped Lithium Niobate", Proc. SPIE 0704, Integrated Optical Circuit Engineering IV, (10 March 1987); https://doi.org/10.1117/12.937182

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