Swapping of orbital angular momentum states of light in a quantum well waveguide

In this paper, we have proposed a new model for controlling the light propagation in a defect photonic crystal structure with a dispersive defect layer. The defect layer consists of a four-level quantum wells interacts by two optical vortex lights. Here, a weak signal light can be generated due to the four-wave mixing mechanism, and this led to phase dependent of the medium. By intensity modulations of the applied lights, we study the 3D properties of the transmitted, reflected and absorption spectrums of the incident light from defect photonic crystal. We have shown that via azimuthal modulations of the optical vortex light the incident light can be absorbed or amplified easily.

Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Three-dimensional control of the light propagation in a defect photonic crystal

Bravo A,

Aslla Q,

Huamán-Romaní

et al. 2023

“…The detunings ∆ 1(2) = ω 23(31) − ω 1(2) are defined as the differences between the frequencies of the exciton-biexciton transitions ω 23 (31) , and the central frequencies of the probe beams ω 1 (2) . We have neglected the diffraction terms from the Maxwell equations in this study [45][46][47][48]. The specific values chosen for the parameters in this paper are…”

Section: Model and Equationsmentioning

confidence: 99%

“…Some of the remarkable effects include light-induced torque [33,34], atom vortex beams [35], entanglement of OAM states in photon pairs [36], OAM-based FWM [37,38], and spatially structured optical phenomena [39][40][41][42][43][44]. Additionally, the transfer of OAM between light and matter has also been investigated [45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Spatially structured optical effects in semiconductor quantum dots via biexciton coherence

Batoo,

Al-Dolaimy,

Zaid

et al. 2023

In this paper, we study the spatially structured optical effects that occur when weak laser lights interact with coherently prepared semiconductor quantum dots (SQDs). Initially, the SQD is prepared in a coherent superposition of the lower exciton states. By utilizing two weak optical vortex fields that couple to a biexciton state, we observe spatially dependent effects of the absorption of probe fields. Using the well-established Maxwell–Bloch equations, we analyze the generation of composite optical vortex beams within this system. Our investigation revolves around the formation of different types of spatially dependent beams, exploring their properties and characteristics. Additionally, the transfer of optical vortices through the parametric generation process is examined, for the case where only one vortex beam is present at the beginning of the medium. This study provides insights into the spatially structured optical phenomena in coherently prepared SQDs and contributes to the understanding of light–matter interactions in such systems.

“…Many groups have researched the refractive index of multi-level atomic systems or semiconductor nanostructures using quantum coherence and interference [27,28]. Due to the most essential applications in quantum information science, the optical characteristics of multi-level atomic systems and diverse configurations have also been addressed in detail [29][30][31][32][33][34][35][36][37][38]. Quantum coherence and interference have been shown in certain articles to cause the refractive index of a material to increase or even become negative [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Phase control of optical Goos–Hänchen shifts in a quantum dot nanostructure via high refractive index

Raheli¹,

Abdulkareem²,

Al-Qargholi³

2022

We proposed a model for adjusting Goos–Hänchen (GH) shifts in a cavity with quantum dot (QD) nanostructure in this letter. The actual component of the susceptibility was studied by analytical solution of the coherence term of the density matrix elements, and the refractive index of the QD nanostructure was explored. We discovered that the intracavity medium became phase sensitive because of the electron tunneling action. As a result, the relative phase of applied lights may be used to manipulate the medium’s refraction index. The GH shifts in reflected and transmitted light beams in high refractive index QD nanostructures with diminishing probe absorption were next examined. We discovered that the GH shifts of reflected and transmitted lights are greatly influenced by the applied lights’ relative phase. We established that greater negative or positive GH shifts in reflected and transmitted photons are conceivable in the presence of electron tunneling.