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Theoretical Investigation of Tunable Goos-Hänchen Shifts in a Four-Level Quantum System

Hossein Jafarzadeh, Mohammad Payravi

International Journal of Theoretical PhysicsMay 4, 20186 citations

Manipulation of Goos–Hänchen shift via phase and angular momentum in Doppler-broadened systems

Muhammad Idrees, Fazal Badshah, Fatima Ghulam Kakepoto +1 more

Chaos Solitons & FractalsAug 27, 202521 citations

Implications of spectral hole burning on the manipulation of spatial Goos–Hänchen shift in an atomic cell

Bakht Amin Bacha, Amin Ur Rahman, Azmat Iqbal Bashir +1 more

Physics Letters ANov 27, 20188 citations

Coherent control of spatial and angular Goos-Hänchen shifts in a metal-clad waveguide structure

Ren-Gang Wan, Muhammad Suhail Zubairy

A metal-clad waveguide backed by a coherent atomic medium is proposed to achieve tunable giant spatial and angular Goos-H\"anchen (GH) shifts. With a metal layer of appropriate thickness, a large GH shift can occur simultaneously for transverse-magnetic- and transverse-electric-polarized light beams when the waveguide modes are resonantly excited. The phase change and dip slope of the reflection coefficient around the resonance angle are closely related to the system's internal damping, which depends on the absorption of the medium. Then based on the quantum coherence effect, the spatial and angular shifts can be greatly enhanced by adjusting the parameters of the atomic system. The lateral displacement can also be switched from positive to negative or vice versa via coherent control of the absorption by the medium. Moreover, the dependence of the resonance angle of the guided mode on the refractive index makes the peak position of GH shifts tunable. The proposed scheme provides more flexibility for manipulating the spatial and the angular GH shifts, and it has potential applications in optical switches, beam steering, etc.A metal-clad waveguide backed by a coherent atomic medium is proposed to achieve tunable giant spatial and angular Goos-H\"anchen (GH) shifts. With a metal layer of appropriate thickness, a large GH shift can occur simultaneously for transverse-magnetic- and transverse-electric-polarized light beams when the waveguide modes are resonantly excited. The phase change and dip slope of the reflection coefficient around the resonance angle are closely related to the system's internal damping, which depends on the absorption of the medium. Then based on the quantum coherence effect, the spatial and angular shifts can be greatly enhanced by adjusting the parameters of the atomic system. The lateral displacement can also be switched from positive to negative or vice versa via coherent control of the absorption by the medium. Moreover, the dependence of the resonance angle of the guided mode on the refractive index makes the peak position of GH shifts tunable. The proposed scheme provides more flexibility for manipulating the spatial and the angular GH shifts, and it has potential applications in optical switches, beam steering, etc.

Physical Review AFeb 25, 202020 citations

Controlling the Goos-Hänchen shift via quantum interference

Mojtaba Rezaei, Mostafa Sahrai

The European Physical Journal DMar 1, 20149 citations

Coherent control of spatial and angular Goos–Hänchen shifts with spontaneously generated coherence and incoherent pumping

Tao Shui, Xiu‐Mei Chen, Wen‐Xing Yang

We propose an efficient scheme to manipulate the Goos–Hänchen (GH) shift of a reflected beam from a metal-clad waveguide, where a coherent atomic medium with a Λ -type configuration is employed as the substrate. Using experimentally achievable parameters, we identify the conditions under which spontaneously generated coherence (SGC) allows us to enhance the spatial and angular GH shifts of the reflected beam. With the help of SGC, the relative phases of the probe and control fields can alter the absorption gain and refractive index of the atomic medium, thereby manipulating the magnitudes, signs, and positions of the spatial and angular shifts. Furthermore, the spatial and angular GH shifts can be coherently controlled via adjusting the incoherent pumping rate and the intensity of the control field. Our proposal provides an avenue for the manipulation of spatial and angular GH shifts and potential applications in optical switching and optical steering.We propose an efficient scheme to manipulate the Goos–Hänchen (GH) shift of a reflected beam from a metal-clad waveguide, where a coherent atomic medium with a Λ -type configuration is employed as the substrate. Using experimentally achievable parameters, we identify the conditions under which spontaneously generated coherence (SGC) allows us to enhance the spatial and angular GH shifts of the reflected beam. With the help of SGC, the relative phases of the probe and control fields can alter the absorption gain and refractive index of the atomic medium, thereby manipulating the magnitudes, signs, and positions of the spatial and angular shifts. Furthermore, the spatial and angular GH shifts can be coherently controlled via adjusting the incoherent pumping rate and the intensity of the control field. Our proposal provides an avenue for the manipulation of spatial and angular GH shifts and potential applications in optical switching and optical steering.

Applied OpticsNov 22, 202221 citations

Theoretical Study of Spatial and Angular Goos-Hänchen Shifts in Quantum System

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Theoretical Study of Spatial and Angular Goos-Hänchen Shifts in Quantum System

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