TITLE:
Effects of Quantum well Size Alteration on Excitonic Population Oscillation Slow Light Devices Properties
AUTHORS:
Hassan Kaatuzian, Hossein Shokri Kojori, Ashkan Zandi, Reza Kohandani
KEYWORDS:
Slow Light; Coherent Population Oscillation; Quantum Well; Exciton Oscillator Strength; Exciton Binding Energy
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.2B,
July
23,
2013
ABSTRACT: This paper investigates the effects of quantum well size
changes on center frequency and slow down factor of an slow light device. In
this way, we consider the quantum well size alteration effects on oscillator
strength and binding energy of exciton. First, we investigate the variations in
oscillator strength of exciton due to different quantum well size. Second,
exciton binding energy level shift due to size of quantum well is investigated.
According to this analysis, we have developed a new method for tuning slow
light device bandwidth center frequency and slow down factor. Analysis and
simulation of a basic GaAs/AlGaAs quantum wells optical slow light
device based on excitonic population oscillation shows that size of quantum
wells could tune both of the frequency properties and slow down factor of an
optical slow light device. In our simulation with 34 quantum wells each with
the width of 60?, we have received the slow down factor of more than 60,000.
These achievements are useful in optical nonlinearity enhancements, all-optical
signal processing applications and optical communications.