Open Accessp-i-n junction quantum dot saturable absorber mirror: electrical control of ultrafast dynamics
Author(s) -
Svetlana Zolotovskaya,
Mantas Butkus,
R. Häring,
Andreas Able,
Wilhelm Kaenders,
I. L. Krestnikov,
D.A. Livshits,
Edik U. Rafailov
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.009038
Subject(s) - saturable absorption , optics , materials science , fluence , ultrashort pulse , quantum dot , optoelectronics , absorption (acoustics) , mode locking , saturation (graph theory) , nonlinear optics , laser , wavelength , physics , fiber laser , mathematics , combinatorics
We report on nonlinear optical properties of a p-i-n junction quantum dot saturable absorber based on InGaAs/GaAs. Absorption recovery dynamics and nonlinear reflectivity are investigated for different reverse bias and pump power conditions. A decrease in absorption recovery time of nearly two orders of magnitude is demonstrated by applying a voltage between 0 and -20 V. The saturable absorber modulation depth and saturation fluence are found to be independent from the applied reverse bias.