aqora

Negative Refractive Index in Atomic System Based on Incoherent Pump

Kang Haixia, 寇军 Kou Jun, 苏雪梅 Su Xuemei +1 more

Acta Optica SinicaJan 1, 20091 citation

Tunable slow and fast light in an atom-assisted optomechanical system with a mechanical pump

Cui-Ming Han, Xin Wang, Hao Chen +1 more

Optics CommunicationsSep 25, 201914 citations

Negative refraction without absorption via both coherent and incoherent fields in a four-level left-handed atomic system

Shun‐Cai Zhao, Zhengdong Liu, Qixuan Wu

arXiv:2403.00847Optics CommunicationsMay 11, 201024 citations

A DRESSED-STATE ASSISTED LEFT-HANDED COHERENT MEDIUM FOR HIGH-GAIN OPTICAL AMPLIFICATION

Jian-Qi Shen

Abstract—A scheme of double-negative left-handed atomic vapor medium based on dressed-state assisted simultaneous electric and magnetic resonances is suggested. In this mechanism, simultaneous electric- and magnetic-dipole allowed transitions of atoms are driven by an optical wave by taking full advantage of both mixed-parity dressed-state assisted resonance and incoherent population pumping in a quantum-coherent atomic medium (e.g., alkali-metal atomic vapor). Since the simultaneously negative permittivity and permeability can be achieved in a same frequency band, such an atomic vapor will exhibit an incoherent-gain double-negative refractive index that is three-dimensionally isotropic and homogeneous. The imaginary part of the negative refractive index of the present atomic vapor would be drastically suppressed or would become negative because of loss compensation through incoherent population transfer. The quantum-coherent left-handed atomic vapor presented here will have four characteristics: i) three-dimensionally isotropic and homogeneous negative refractive index, ii) double-negative atomic medium at visible (and infrared) wavelengths, iii) tunable negative refractive index based on dressed-state quantum coherence, and iv) high gain due to incoherent pumping action.Abstract—A scheme of double-negative left-handed atomic vapor medium based on dressed-state assisted simultaneous electric and magnetic resonances is suggested. In this mechanism, simultaneous electric- and magnetic-dipole allowed transitions of atoms are driven by an optical wave by taking full advantage of both mixed-parity dressed-state assisted resonance and incoherent population pumping in a quantum-coherent atomic medium (e.g., alkali-metal atomic vapor). Since the simultaneously negative permittivity and permeability can be achieved in a same frequency band, such an atomic vapor will exhibit an incoherent-gain double-negative refractive index that is three-dimensionally isotropic and homogeneous. The imaginary part of the negative refractive index of the present atomic vapor would be drastically suppressed or would become negative because of loss compensation through incoherent population transfer. The quantum-coherent left-handed atomic vapor presented here will have four characteristics: i) three-dimensionally isotropic and homogeneous negative refractive index, ii) double-negative atomic medium at visible (and infrared) wavelengths, iii) tunable negative refractive index based on dressed-state quantum coherence, and iv) high gain due to incoherent pumping action.

Electromagnetic wavesJan 1, 20130 citations

Electromagnetically induced negative refraction in an atomic system with spontaneously generated coherence

Nuo Ba, Jin-Wei Gao, Wei Fan +4 more

Optics CommunicationsAug 25, 200811 citations

Electromagnetically induced left-handedness by both coherent and incoherent fields

Xue Mei Su, Hoonsoo Kang, J. Kou +2 more

We propose a scheme of electromagnetically induced left-handedness in a dense atomic vapor medium. By applying an incoherent pump field to manipulate the populations in atomic levels, and a strong coherent field to create quantum coherence, the magnetic part of the probe field can be amplified instead of strong absorption as usual materials. The system has negative permittivity and permeability simultaneously with transparent propagation of the electric part of the probe field. It is shown that the pumping rate of incoherent field, the intensity and frequency detuning of the coherent field, exert effects on the properties of the negative refractive index of left-handed material.We propose a scheme of electromagnetically induced left-handedness in a dense atomic vapor medium. By applying an incoherent pump field to manipulate the populations in atomic levels, and a strong coherent field to create quantum coherence, the magnetic part of the probe field can be amplified instead of strong absorption as usual materials. The system has negative permittivity and permeability simultaneously with transparent propagation of the electric part of the probe field. It is shown that the pumping rate of incoherent field, the intensity and frequency detuning of the coherent field, exert effects on the properties of the negative refractive index of left-handed material.

Physical Review AAug 11, 200911 citations

From slow to fast light in amplified negative refraction using atomic coherence assisted by an incoherent pump

Related papers

From slow to fast light in amplified negative refraction using atomic coherence assisted by an incoherent pump

Related papers