Group velocity of light in V and Λ-types cylindrical quantum dots with electromagnetically induced transparency

• By increasing control laser field amplitude, slow light frequency range and maximum of group velocity is increased.
• By increasing height of cylindrical QDs, slow light frequency range is shifted to less frequency.
• By increasing QD radius, slow light frequency range is increased.
• Slow light frequency range in z-polarization is closer than x-polarization.
• Maximum of group velocity in V-Type is more than Λ-Type.

This paper aims to investigate group velocity of light and slow light in cylindrical quantum dot. By considering a V-Type three level system under EIT, group velocity equation of cylindrical quantum dot is found and the effects of different parameters such as control laser amplitude, radius and height of cylindrical QD and polarization of light are investigated. Group velocity of light in V-Type is compared with group velocity of light in Λ-Type.