Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of the Optical Society of America B

Enhanced fifth-order nonlinearity with competing linear and nonlinear susceptibility via Fano interference

Chen Li, Jing Wang, Li‐Dan Lin, Qingtian Zeng, Yangjian Cai, Aihong Yang, Yandong Peng

Published Mar 9, 2021• 4 citations
Publisher

Abstract

Enhanced fifth-order nonlinearity with Fano interference is theoretically studied in asymmetric double quantum wells. The resonant tunneling induces constructive interference for third- and fifth-order nonlinearities. Their competition causes a transparency window at some frequency detuning, where the fifth-order refractive index can be simultaneously enhanced by Fano interference. Simulation results show that fifth-order nonlinearity can be enhanced by about 10 times compared to that without the Fano effect. Also, the influence of different strengths of resonant tunneling coupling and Fano interference on enhanced high-order nonlinearity is discussed.

DOI
10.1364/josab.418149

Related papers

Tunneling-induced large fifth-order nonlinearity with competing linear and nonlinear susceptibilities

Yandong Peng, Aihong Yang, Bing Chen +2 more

Tunneling-induced large fifth-order nonlinearity is theoretically demonstrated in a double-quantum-dot system. The resonant tunneling induces constructive interference for the third- and fifth-order nonlinear effects. The competition between the linearity and nonlinearity leads to a transparency window at some frequency detunings, where the fifth-order nonlinear refractive index could be increased to be more than one order of magnitude larger than that on resonance. An analytical expression shows that the resonant tunneling mainly contributes to the dramatic enhancement of the fifth-order nonlinear response.

Journal of the Optical Society of America B•Aug 22, 2014•13 citations

Tunneling induced absorption with competing Nonlinearities

Yandong Peng, Aihong Yang, Yan Xu +4 more

We investigate tunneling induced nonlinear absorption phenomena in a coupled quantum-dot system. Resonant tunneling causes constructive interference in the nonlinear absorption that leads to an increase of more than an order of magnitude over the maximum absorption in a coupled quantum dot system without tunneling. Resonant tunneling also leads to a narrowing of the linewidth of the absorption peak to a sublinewidth level. Analytical expressions show that the enhanced nonlinear absorption is largely due to the fifth-order nonlinear term. Competition between third- and fifth-order nonlinearities leads to an anomalous dispersion of the total susceptibility.

Scientific Reports•Dec 13, 2016•17 citations

Enhancing Kerr nonlinearity in an asymmetric double quantum well via Fano interference

孙辉, 龚尚庆, 钮月萍 +3 more

We investigate the enhancement of Kerr nonlinearity in an asymmetric GaAs double quantum well via Fano interference, which is caused by tunneling from the excited subband to the continuum. In our structure, owing to Fano interference, the Kerr nonlinearity can be enhanced by appropriately choosing the values of the detunings and the intensity of the pump field, while cancel the linear and nonlinear absorptions.

•Jan 1, 2006•0 citations

Enhancing Kerr nonlinearity in an asymmetric double quantum well via Fano interference

Hui Sun, Shangqing Gong, Yueping Niu +3 more

We investigate the enhancement of Kerr nonlinearity in an asymmetric GaAs double quantum well via Fano interference, which is caused by tunneling from the excited subband to the continuum. In our structure, owing to Fano interference, the Kerr nonlinearity can be enhanced by appropriately choosing the values of the detunings and the intensity of the pump field, while cancel the linear and nonlinear absorptions.

Physical Review B•Oct 17, 2006•132 citations

Proposal of nonlinear measurement of tunneling in quantum wells with Fano interference

Chen Li, Bing Chen, Zhengmao Jia +4 more

An enhanced absorption spectrum by Fano interference is proposed to measure the tunneling between a discrete state and a continuum in asymmetric quantum wells (QWs). Interestingly, the asymmetry of the enhanced absorption spectrum is sensitive to tunneling strength, which can be used to measure the tunneling in QWs. Further study shows that the asymmetry of a nonlinear absorption spectrum is greater than that of a linear absorption spectrum, indicating better probe sensitivity. The simulation results show that the probe sensitivity based on nonlinear absorption is approximately 10 times larger than that of linear absorption. In addition, the effects of control-field intensity and detuning on probe sensitivity are evaluated.

Journal of the Optical Society of America B•Jan 24, 2020•0 citations

Switching of amplification to absorption with enhanced Kerr nonlinearity in double quantum wells via Fano interference

Rohit Mukherjee, Nitu Borgohain, Rohit Hazra

Abstract In this communication, we investigate linear and nonlinear (Kerr) responses in an asymmetric double quantum wells induced by a weak probe and controlled by a signal field under double Λ excitation via the Fano interference. By carefully tuning the control field intensities, probe detuning and relative phase of the interacting electromagnetic fields, the amplification as well as the electromagnetically induced transparency (EIT) can be achieved to an efficient level in the proposed scheme. We observe that the absorption of the probe and signal fields decrease with the decrease in the strength of the Fano interference (ξ), while the Kerr nonlinearity enhances by almost ten times, reaching a value of the order ~ 10 − 10 m 2 / V 2 under the regime of EIT. The results presented may serve as a valuable reference for designing optimized slow and fast-light, solid-based optical switching devices, offering significant advantages over those based on atomic media.

Journal of Optics•Jun 11, 2026•0 citations
Enhanced fifth-order nonlinearity with Fano interference is theoretically studied in asymmetric double quantum wells. The resonant tunneling induces constructive interference for third- and fifth-order nonlinearities. Their competition causes a transparency window at some frequency detuning, where the fifth-order refractive index can be simultaneously enhanced by Fano interference. Simulation results show that fifth-order nonlinearity can be enhanced by about 10 times compared to that without the Fano effect. Also, the influence of different strengths of resonant tunneling coupling and Fano interference on enhanced high-order nonlinearity is discussed.
Tunneling-induced large fifth-order nonlinearity is theoretically demonstrated in a double-quantum-dot system. The resonant tunneling induces constructive interference for the third- and fifth-order nonlinear effects. The competition between the linearity and nonlinearity leads to a transparency window at some frequency detunings, where the fifth-order nonlinear refractive index could be increased to be more than one order of magnitude larger than that on resonance. An analytical expression shows that the resonant tunneling mainly contributes to the dramatic enhancement of the fifth-order nonlinear response.
We investigate tunneling induced nonlinear absorption phenomena in a coupled quantum-dot system. Resonant tunneling causes constructive interference in the nonlinear absorption that leads to an increase of more than an order of magnitude over the maximum absorption in a coupled quantum dot system without tunneling. Resonant tunneling also leads to a narrowing of the linewidth of the absorption peak to a sublinewidth level. Analytical expressions show that the enhanced nonlinear absorption is largely due to the fifth-order nonlinear term. Competition between third- and fifth-order nonlinearities leads to an anomalous dispersion of the total susceptibility.
An enhanced absorption spectrum by Fano interference is proposed to measure the tunneling between a discrete state and a continuum in asymmetric quantum wells (QWs). Interestingly, the asymmetry of the enhanced absorption spectrum is sensitive to tunneling strength, which can be used to measure the tunneling in QWs. Further study shows that the asymmetry of a nonlinear absorption spectrum is greater than that of a linear absorption spectrum, indicating better probe sensitivity. The simulation results show that the probe sensitivity based on nonlinear absorption is approximately 10 times larger than that of linear absorption. In addition, the effects of control-field intensity and detuning on probe sensitivity are evaluated.
Abstract In this communication, we investigate linear and nonlinear (Kerr) responses in an asymmetric double quantum wells induced by a weak probe and controlled by a signal field under double Λ excitation via the Fano interference. By carefully tuning the control field intensities, probe detuning and relative phase of the interacting electromagnetic fields, the amplification as well as the electromagnetically induced transparency (EIT) can be achieved to an efficient level in the proposed scheme. We observe that the absorption of the probe and signal fields decrease with the decrease in the strength of the Fano interference (ξ), while the Kerr nonlinearity enhances by almost ten times, reaching a value of the order ~ 10 − 10 m 2 / V 2 under the regime of EIT. The results presented may serve as a valuable reference for designing optimized slow and fast-light, solid-based optical switching devices, offering significant advantages over those based on atomic media.