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Phase control of group velocity in one-dimensional photonic crystal with a dispersive defect layer

Dariush Jafari, Mostafa Sahrai, Hossein Motavalli

OptikFeb 5, 20138 citations

Transmission property for a one-dimensional photonic crystal containing a subwavelength layer and a nonlinear layer

P. Hou, Yong Chen, Jun Feng Shi +3 more

Applied Physics AJan 25, 20088 citations

Propagation of optical pulses through one-dimensional photonic crystals with a dispersive and gain defect layer

Yu Tian-Bao, Nian-Hua Liu, 南昌大学物理系,南昌 330047

The propagation of a pulse through onedimensional photonic crystals with a dispersive and gain defect layer is discussed. The dispersion and gain of the defect layer is described by Lorentz oscillator model. It is found that the pulse pea k exhibits subluminal and superluminal behaviors with varying strength of the os cillator. The Poynting vector and energy velocity can be negative, but the latte r is never faster than the vacuum light speed c. The advance or delay of the pulse peak is a result of the coherent superposition of all Fourier components which experienced different phase shift and different amplification in the medium.The propagation of a pulse through onedimensional photonic crystals with a dispersive and gain defect layer is discussed. The dispersion and gain of the defect layer is described by Lorentz oscillator model. It is found that the pulse pea k exhibits subluminal and superluminal behaviors with varying strength of the os cillator. The Poynting vector and energy velocity can be negative, but the latte r is never faster than the vacuum light speed c. The advance or delay of the pulse peak is a result of the coherent superposition of all Fourier components which experienced different phase shift and different amplification in the medium.

Acta Physica SinicaJan 1, 20042 citations

Amplified Emission in a Colloidal Photonic Crystal

Luis González-Urbina, Javier Moreno, Koen Clays

Dec 2, 20110 citations

All-optical switch based on doped graphene quantum dots in a defect layer of a one-dimensional photonic crystal

Mostafa Sahrai, Majid Abbasabadi

We discuss the light pulse propagation in a one-dimensional photonic crystal doped by graphene quantum dots in a defect layer. The graphene quantum dots behave as a three-level quantum system and are driven by three coherent laser fields. It is shown that the group velocity of the transmitted and reflected pulses can be switched from subluminal to superluminal light propagation by adjusting the relative phase of the applied fields. Furthermore, it is found that by proper choice of the phase difference between applied fields, the weak probe field amplification is achieved through a one-dimensional photonic crystal. In this way, the result is simultaneous subluminal transmission and reflection.We discuss the light pulse propagation in a one-dimensional photonic crystal doped by graphene quantum dots in a defect layer. The graphene quantum dots behave as a three-level quantum system and are driven by three coherent laser fields. It is shown that the group velocity of the transmitted and reflected pulses can be switched from subluminal to superluminal light propagation by adjusting the relative phase of the applied fields. Furthermore, it is found that by proper choice of the phase difference between applied fields, the weak probe field amplification is achieved through a one-dimensional photonic crystal. In this way, the result is simultaneous subluminal transmission and reflection.

Applied OpticsJan 16, 201821 citations

Phenomenon of slow light in 1D photonic crystals

Didit Yudistira, David A. I. Marpaung, H.P. Handoyo +4 more

Apr 8, 20050 citations

Inversionless light amplification in one-dimensional photonic crystal with a dispersive layer

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