We present the experimental realization of optical superlattices created by exposing laser cooled ${}^{85}\mathrm{Rb}$ atoms to a bichromatic standing-wave light field. The two light frequencies are tuned close to the ${D}_{1}$ and ${D}_{2}$ lines of ${}^{85}\mathrm{Rb}.$ The total optical potential seen by the atoms exhibits a modulation at the spatial beat period of the two light fields in addition to the typical periodicity on the scale of an optical wavelength. The bichromatic light field cools the atoms into the superlattice potential, resulting in a density modulation on a macroscopic scale. We have observed the density modulation directly in one- and three-dimensional superlattice configurations using an absorption imaging technique.We present the experimental realization of optical superlattices created by exposing laser cooled ${}^{85}\mathrm{Rb}$ atoms to a bichromatic standing-wave light field. The two light frequencies are tuned close to the ${D}_{1}$ and ${D}_{2}$ lines of ${}^{85}\mathrm{Rb}.$ The total optical potential seen by the atoms exhibits a modulation at the spatial beat period of the two light fields in addition to the typical periodicity on the scale of an optical wavelength. The bichromatic light field cools the atoms into the superlattice potential, resulting in a density modulation on a macroscopic scale. We have observed the density modulation directly in one- and three-dimensional superlattice configurations using an absorption imaging technique.

Physical Review AJun 4, 200133 citations

Wafer-level optical packaging for chip-scale atomic magnetometers

Qi Gan, Lei Wu, Yu Ji +1 more

A wafer-level optical package solution for chip-scale atomic magnetometers is presented, which is based on microelectronic fabrication process on a 4 inch wafer. A module is fabricated following the process. By measuring the intensity of the light, it is indicated that the quality of parallelism and polarizability of the laser beam from a Vertical Cavity Surface Emitting Laser (VCSEL) in the module are acceptable. The frequency of the VCSEL is locked to D1 line of Rubidium through proper adjustment of temperature and driving current. The module is employed in an atomic magnetometer which operates in Mz configuration for the detection the strength of magnetic fields. Results show the feasibility of the package in a magnetometer system.A wafer-level optical package solution for chip-scale atomic magnetometers is presented, which is based on microelectronic fabrication process on a 4 inch wafer. A module is fabricated following the process. By measuring the intensity of the light, it is indicated that the quality of parallelism and polarizability of the laser beam from a Vertical Cavity Surface Emitting Laser (VCSEL) in the module are acceptable. The frequency of the VCSEL is locked to D1 line of Rubidium through proper adjustment of temperature and driving current. The module is employed in an atomic magnetometer which operates in Mz configuration for the detection the strength of magnetic fields. Results show the feasibility of the package in a magnetometer system.

International Conference on Electronic Packaging Technology (ICEPT)Aug 1, 20152 citations

Quantum Model for Optical Phase Modulator

A.G. Tam, Kerry James Hinton, Peter M. Farrell +1 more

Jan 1, 20090 citations

Experimental study of the quantum driven pendulum and its classical analog in atom optics

W. K. Hensinger, Andrew G. Truscott, Ben Upcroft +4 more

We present experimental results for the dynamics of cold atoms in a far detuned amplitude-modulated optical standing wave. Phase-space resonances constitute distinct peaks in the atomic momentum distribution containing up to 65% of all atoms resulting from a mixed quantum chaotic phase space. We characterize the atomic behavior in classical and quantum regimes and we present the applicable quantum and classical theory, which we have developed and refined. We show experimental proof that the size and the position of the resonances in phase space can be controlled by varying several parameters, such as the modulation frequency, the scaled well depth, the modulation amplitude, and the scaled Planck's constant of the system. We have found a surprising stability against amplitude noise. We present methods to accurately control the momentum of an ensemble of atoms using these phase-space resonances which could be used for efficient phase-space state preparation.We present experimental results for the dynamics of cold atoms in a far detuned amplitude-modulated optical standing wave. Phase-space resonances constitute distinct peaks in the atomic momentum distribution containing up to 65% of all atoms resulting from a mixed quantum chaotic phase space. We characterize the atomic behavior in classical and quantum regimes and we present the applicable quantum and classical theory, which we have developed and refined. We show experimental proof that the size and the position of the resonances in phase space can be controlled by varying several parameters, such as the modulation frequency, the scaled well depth, the modulation amplitude, and the scaled Planck's constant of the system. We have found a surprising stability against amplitude noise. We present methods to accurately control the momentum of an ensemble of atoms using these phase-space resonances which could be used for efficient phase-space state preparation.

Physical Review AAug 6, 200123 citations

General Theoretical Model for Resonantly Enhanced Optical Modulators

Gpo Box

Acta Optica SinicaJan 1, 20030 citations

We present the experimental realization of optical superlattices created by exposing laser cooled

{}^{85}\mathrm{Rb}

atoms to a bichromatic standing-wave light field. The two light frequencies are tuned close to the

{D}_{1}

and

{D}_{2}

lines of

{}^{85}\mathrm{Rb}.

The total optical potential seen by the atoms exhibits a modulation at the spatial beat period of the two light fields in addition to the typical periodicity on the scale of an optical wavelength. The bichromatic light field cools the atoms into the superlattice potential, resulting in a density modulation on a macroscopic scale. We have observed the density modulation directly in one- and three-dimensional superlattice configurations using an absorption imaging technique.