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In this paper we simulate and analyze a sample of slow light semiconducting device with quantum dot structure based on coherent population oscillation (CPO). The simulation is conducted to enhance the main parameters of slow light device and a method is presented for setting the output specifications of this kind of devices. In this paper, we deal with changing the size of quantum dot to find the ideal size. The simulation results indicate that as the size of quantum dot changes properly (with reducing more than 50 percent of quantum dots both radius and height), then the slope of diagram of the real part of refractive index increases significantly so that the Slow Down Factor (SDF) predicted to be18 times greater. Analysis and simulations based on cylinderical quantum dots structure slow light devices based on exitonic cpo.

Slow light attracted significant attentions to itself as a method to control significantly light velocity [

Where,

In

The CPO based slow light devices is a system which has two energy levels. In a 2-energy levels system, if the difference between signal and detuning frequency is in the range of inverse of carriers life, then it will have a significant CPO, because the life time of carriers is a temporal interval in which population oscillation is able to track the interference frequency induced by pump and signal [

In above equation,

coefficient

We consider the quantum dot system with

The 3 dimensional diagrams of real part of refractive index and SDF is drawn for simultaneous changes of radius and detuning to achieve a better understanding of the subject (

In

If we consider the strike of detuning in

If we look at

This paper studies and simulates a sample of semiconductor slow light devices with quantum dot structure and

we suggested new techniques for setting output specifications of these devices. Based on the obtained results, it can be said when the size of quantum dot is decreased, the slope of real part of refractive index curve increases and therefore, a bigger SDF is achieved. In this paper the maximum SDF for radius is equal to 3 nm and the height equal to 2 nm which is achieved is equal 4560 which is eighteen times larger than the reference paper [

Bahram Choupanzadeh,Hassan Kaatuzian,Reza Kohandani,Saeed Abdolhosseini, (2016) Simulation and Characteristics Improvement of Quantum Dot Slow Light Devices by Geometrical Dimension Alteration. Optics and Photonics Journal,06,114-119. doi: 10.4236/opj.2016.68B019