Slow and fast light propagation and controllable switch at λ  =  1.55 µm in a photonic crystal with a defect layer doped by an InAs/GaAs quintuple-coupled quantum dot molecule nanostructure

Abstract

The transient and steady-state behavior of the probe absorption and dispersion at 1.55 µm wavelength through a 1D photonic crystal with a defect layer doped by an InAs/GaAs quintuple quantum dot molecule nanostructure are discussed. We show that the group velocity of a light pulse can be controlled just by controlling the rate of incoherent pumping and interdot tunneling. We also investigate the electro-optical switching time of light propagation from subluminal to superluminal or vice versa. The time required to switch from subluminal to superluminal light propagation is found to be in the range 17-34 ps. Such controllable optical properties in a 1D photonic crystal with a defect layer may provide some new possibilities for technological applications in optoelectronics, solid-state quantum information science and systems dealing with signal processing.

The analysis of coherent phenomena for both linear and non-linear interactions in a four-level ladder (Ξ)-type configuration using density matrix formalism in dressed state representation

“…Electromagnetically induced transparency (EIT) [1][2][3][4] is one such phenomenon where coherent interaction of lasers with atomic system can reduce the absorption of the medium at resonant probe transition in presence of strong coupling field. EIT phenomenon has several applications in the field of slowing of light in quantum information [5][6][7][8][9][10], lasing without inversion (LWI) [11], enhanced non-linear optics [1], high-resolution spectroscopy [12], etc. Another analogus counter phenomenon of EIT is electromagnetically induced absorption (EIA) [13,14], where the system becomes highly absorptive by adjusting the strengths of applied laser fields.…”

Controllable optical bistability and multistability in a V-type three-level atomic system interacting with two broadband independent squeezed baths

“…These discoveries, nestled within the intricate framework of different systems [7][8][9][10][11][12][13][14][15], have not only enriched the theoretical research but also unfolded promising practical applications. The diverse optical effects stemming from quantum coherence and interference in multi-level systems extend beyond the confines of theoretical curiosity [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. They hold the potential for real-world applications, with notable examples encompassing optical buffers and modulators exploiting the intriguing slow light phenomenon [32,33].…”

Optical properties of 87Rb atomic vapor near the 1D photonic crystal bandgap and all-optical switching of transmitted light

“…Due to the controllable characteristics of the PC, such as the material of the dielectric layers, the number of layers, and applying of defect layer among the periodic structure of PC, it has been considered by many researchers. Many phenomena based on PC such as optical bistability [24], all-optical switching [25], Goos-Hänchen effect [26], and slow and fast light propagation [27][28][29] in a photonic crystal is investigated that are very important due to application in quantum information science.…”