Control of optical bistability and third-order nonlinearity via tunneling induced quantum interference in triangular quantum dot molecules

Abstract

Control of optical bistability and third-order nonlinearity via tunneling induced quantum interference in triangular quantum dot molecules The optical bistability of a triangular quantum dot molecules embedded inside a unidirectional ring cavity is studied. The type, the threshold and the hysteresis loop of the optical bistability curves can be modified by the tunneling parameters, as well as the probe laser field. The linear and nonlinear susceptibilities of the medium are also studied to interpret the corresponding results. The physical interpretation is that the tunneling can induce the quantum interference, which modifies the linear and the nonlinear response of the medium. As a consequence, the characteristics of the optical bistability are changed. The scheme proposed here can be utilized for optimizing and controlling the optical switching process. C 2015 Author(s

Optical bistability in a negative refractive index media using the electron tunneling effect

“…It is understood that the quantum coherence and interference may be caused with the aid of using the use of excessive using laser fields and electron tunneling between QDs [26,27]. Based on electron tunneling impact in QD nanostructures numerous optical phenomena had been investigated [28][29][30][31][32][33][34]. The impact of electron tunneling on electromagnetically induced grating (EIG) has been investigated in a couple of quantum-well nanostructure [28].…”

Controllable optical bistability in double quantum dot molecule

“…Solookinejad et al [19] proposed a scheme using one-dimensional photonic crystals doped with carbonnanotube quantum dots to achieve OB and multistability which can be controlled by the transverse magnetic field. In addition, the other OB schemes are also researched [20][21][22][23][24][25][26][27][28][29][30].…”