Electromagnetically induced grating in a nonlinear optomechanical cavity

Abstract

We investigate theoretically the Fraunhofer diffraction pattern of the output field in a nonlinear optomechanical cavity with a degenerate optical parametric amplifier (OPA) and a higher order excited atomic ensemble. Studies show that the higher-order-excitation atom, which is similar to the degenerate OPA that acts as a nonlinear medium, induces an electromagnetically induced grating in the output spectrum of the probe field. The coherence of the mechanical oscillator leads to transfer of the probe energy in different diffraction orders of the probe field spectrum such that the phenomenon of optomechanically induced grating is generated from the output probe field. In particular, the presence of nonlinearities with the degenerate OPA and the higher order excited atoms can significantly affect the efficiency of the diffraction pattern providing an additional flexibility for controlling optical properties.

Optomechanically induced grating in a graphene based nanocavity

“…We assume that the pump light has a SW pattern E l = E m sin[π y/Λ y ] in order to examine the Fraunhofer diffraction pattern of the probe light. One can determine the subsequent equation that controls the transmission of the light beam under inquiry by applying Maxwell's equation [48,49]:…”

“…The development of a large nonlinear response [40,41,47,48], the generation of an electromagnetically induced grating (EIG) [19,31,[49][50][51][52], and other associated phenomena [53][54][55][56][57] are all recognized to be particularly crucial for the EIT in a variety of applications. It is interesting to note that the formation of the EIG has been observed when a strong coupling field in an EIT scheme is substituted with a standing wave (SW) [58].…”

Orbital angular momentum sensing of composite vortex light in a single-layer graphene system

“…A pivotal requirement is the interaction between a light source and a material, which can span across diverse mediums [13][14][15][16][17][18][19]. When an atom engages with a field, the resulting atomic coherence emerges as a crucial mechanism, facilitating effective control and modulation of the optical properties within quantum systems [20][21][22][23][24][25].…”

Microwave assisted Fraunhofer diffraction pattern in a four-level light–matter coupling scheme

“…primarily based on quantum interference phenomena and atomic coherence [5][6][7]. The foundations of quantum coherence and interference extend to atom-field interactions [8][9][10][11], measurement theory [12], enormous Kerr nonlinearities [13], and many other areas of atomic physics and quantum optics [14][15][16][17]. For quantum interference-based 1D atom grating, several different techniques have been presented [18][19][20][21].…”

“…It was realized that the intensity of the first order of the diffraction depends on the probe detuning and amplitude of the SW fields. Recently, several models have been proposed for controlling the Fraunhofer diffraction pattern in different quantum systems [8,10,11,[31][32][33][34][35][36]. Chen studied [8] the Fraunhofer diffraction pattern of the output field in a nonlinear optomechanical cavity with a degenerate optical parametric amplifier and a higher order excited atomic ensemble.…”