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Search Publications by: Edward Hagley (Fed)

Displaying 26 - 50 of 120

High-Fidelity, Weak-Light Polarization Gate Using Room-Temperature Atomic Vapor

October 23, 2014

Author(s)

Lu Deng, Runbing Li, Chengjie Zhu, Edward W. Hagley

Using a polarization-selective-Kerr-phase-shift technique we demonstrate an all-optical polarization gate in an atomic gain medium with the control-field intensity equivalent to 20 photons of 10 nanoseconds propagating in a 5 μm mode diameter photonic

Fast, high-fidelity, all-optical and dynamically-controlled polarization gate using room-temperature atomic vapor

October 21, 2014

Author(s)

Runbing Li, Chengjie Zhu, Lu Deng, Edward W. Hagley

We demonstrate a fast, all-optical polarization gate in a room-temperature atomic medium. Using a Polarization-Selective-Kerr-Phase-Shift (PSKPS) technique, we selectively write a p phase shift to one circularly-polarized component of a linearly-polarized

Dynamic, Ultra-Slow Optical-Matter Wave Analog of an Event Horizon

August 28, 2014

Author(s)

C. J. Zhu, Lu Deng, Edward W. Hagley, Mo-Lin Ge

We investigate theoretically the effects of a dynamically increasing medium index on optical- wave propagation in a rubidium condensate. A long pulsed pump laser coupling a D2 line transition produces a rapidly growing internally generated field. This

Highly efficient, broadband coherent surface-mixing-wave generation using amplified surface plasmonic polaritons

May 21, 2014

Author(s)

C. J. Zhu, X Zhao, Guoxiang Huang, Lu Deng, Edward W. Hagley, Yan Ren

We show that coherent broadband surface mixing-wave (SMW) by a hyper-Raman process can be efficiently generated near a metallic surface abutting a quasi-three-level gain medium. The generation process is significantly enhanced by the amplified surface

Optical self-focusing effect in coherent light scattering with condensates

March 3, 2014

Author(s)

Lu Deng, Edward W. Hagley, C.J. Zhu, G.X. Huang

We present a theoretical investigation of optical self-focusing effects in light scattering with condensates. Using long (>200 μs), red-detuned pulses we show numerically that a nonnegligible self-focusing effect is present that causes rapid optical beam

Suppression of Directional Light-Wave Mixing in Normal and Quantum Gases

October 30, 2013

Author(s)

Lu Deng, Chengjie Zhu, Edward W. Hagley, W R. Garrett

We discuss nonlinear optical processes in the presence of quantum gases. We show that in contrast to a normal gas where the medium passively participates in nonlinear optical processes, quantum gases actively interact with the wave mixing process by

Optical cloaking using alternate Raman gain and free-space media in the presence of spatially distributed pump fields

October 22, 2013

Author(s)

Chengjie Zhu, Lu Deng, Edward W. Hagley, Mo-Lin Ge

We discuss an optical "cloaking" scheme using three-level active Raman gain media in tandem in the presence of a spatially distributed pump field. Using eikonal approximation we first derive analytically the deflection angle and show that the trajectory of

Linear and nonlinear Faraday rotations of light polarization in a four-level active-Raman-gain medium

August 28, 2013

Author(s)

Lu Deng, Chengjie Zhu, Edward W. Hagley

We investigate linear and nonlinear Faraday effects in a room-temperature, coherently driven four-level active- Raman-gain (ARG) medium. By using the multiple-scale method, we derive two nonlinear coupled envelope equations governing the dynamics of left-

Dynamic light deflection in an active Raman-gain medium using a spatially inhomogeneous pump

July 25, 2013

Author(s)

Lu Deng, Edward W. Hagley, Chengjie Zhu

We study optical wave deflection in a three-level active Raman gain medium using a spatially inhomogeneous pump field. Using the eikonal approximation, we derive an analytical expression for the deflection angle and demonstrate more than an order of

Hybrid quantum-well system for wavelength-channel selection

June 28, 2013

Author(s)

Lu Deng, Edward W. Hagley, Chengjie Zhu

We consider a hybrid quantum-well structure consisting of regions whose properties alternate between active Raman gain and electromagnetically induced transparency. We present both analytical and numerical results that indicate a large light beam defection

Light-Wave Mixing and Scattering with Quantum Gases

May 21, 2013

Author(s)

Lu Deng, Chengjie Zhu, Edward W. Hagley

We present a general theoretical framework on light-wave mixing and scattering in quantum gases. We show that all such processes that originate from elementary excitations are stimulated Raman or hyper-Raman in nature. In the forward direction, the third

Highly efficient counter-propagation-beams narrow-band ultraviolet frequency conversion in a quantum gas

May 14, 2013

Author(s)

chengjie Zhu, Lu Deng, Edward W. Hagley

We show that highly efficient ultraviolet frequency up conversion can be established in a single- component quantum gas in the counter-propagating weak pump beam geometry where no frequency up conversion can occur in a normal gas. We also show that all

Light-Wave Mixing with Quantum Gases

May 1, 2013

Author(s)

Lu Deng, Edward W. Hagley, R Q. Wang, Charles W. Clark

Nonlinear optics has come a long way since the laser. This article reviews recent progress in coherent light-matter wave mixing and introduces some new concepts that will reframe future research directions.