Abstract:
A temporally continuous matter wave beam splitter (14) comprising a plurality of intersecting and interfering laser beam (k r ), which act as waveguides for a matter wave beam. The laser beams of the waveguides each have a frequency detuned below a frequency of an internal atomic transition of the matter wave. The matter wave has a wavevector which is an integral multiple of the wavevector of the laser beams within a region of intersection of the laser beams. There is also provided an atomic interferometer (200) comprising such a continuous matter wave beam splitter, and a solid state device comprising such a continuous matter wave beam splitter, which may be part of an atomic interferometer. A cold atom gyroscope, a cold atom accelerometer or a cold atom gravimeter comprising such a solid state device are also provided. There is further provided a quantum computer comprising such a solid state device, wherein atoms of the matter wave beam are in an entangled quantum state. There is also provided a method of splitting a matter wave beam, comprising introducing the matter wave beam into a first temporally continuous laser beam, the frequency of which is detuned below a frequency of an internal atomic transition of the matter wave beam; intersecting and interfering the first continuous laser beam with a second temporally continuous laser beam, the frequency of which is also detuned below the frequency of the internal atomic transition of the matter wave beam; providing the matter wave beam with a wavevector which is an integral multiple of the wavevector of the first and second laser beams within a region of intersection of the laser beams, whereby the laser beams act as waveguides for the matter wave beam.
Abstract:
Methods of studying, interrogating, analyzing, and detecting particles, substances, and the like with near field light are described. Methods of identifying binding partners, modulators, inhibitors, and the like of particles, substances, and the like with near field light are described. In certain embodiments, the methods comprise immobilizing or trapping the particle, substance, and the like.
Abstract:
Une mesure par interférométrie atomique utilise une source Raman qui est réalisée en modulant une source laser monochromatique. En sélectionnant convenablement des positions (P 0 ) P 1 , P 2 ) auxquelles sont provoquées des interactions entre des atomes et un rayonnement laser produit par la source Raman, il est possible d'annuler ou au moins de réduire un biais de mesure qui est causé par des composantes supplémentaires du rayonnement laser. Une telle mesure à biais annulé ou réduit peut être mise en œuvre dans un capteur inertiel.
Abstract:
Methods, systems and apparatus for generating atomic traps, and for storing, controlling and transferring information between first and second spatially separated phase- coherent objects, or using a single phase-coherent object. For plural objects, both phase- coherent objects have a macroscopic occupation of a particular quantum state by identical bosons or identical BCS-paired fermions. The information may be optical information, and the phase-coherent object(s) may be Bose-Einstein condensates, superfluids, or superconductors. The information is stored in the first phase-coherent object at a first storage time and recovered from the second phase-coherent object, or the same first phase-coherent object, at a second revival time. In one example, an integrated silicon wafer-based optical buffer includes an electrolytic atom source to provide the phase-coherent object(s), a nanoscale atomic trap for the phase-coherent object(s), and semiconductor-based optical sources to cool the phase-coherent object(s) and provide coupling fields for storage and transfer of optical information.
Abstract:
A trap position (30) is set on a substrate (1) of an atomic device, and an electrode pattern (2) is formed on the substrate (1). The electrode pattern (2) has a first pair (21) of electrodes (22, 23) provided at positions on both sides of the trap position (30) along the x axis oriented diagonally and a second pair (26) of electrodes (27, 28) provided at positions on both sides of the traps positions (30) along the y axis perpendicular to the x axis. The atomic device is switched alternately between a first state in which the electrode (22) is at a positive potential +V0 relative to a reference potential and the electrode (23) is at a negative potential -V0 and a second state in which the electrode (27) is at a positive potential +V0 and the electrode (28) is at the negative potential -V0 so as to trap a neutral atom at the trap position (30). Thus, an atomic device such that integration of an atomic circuit can be facilitated and influences such as of disturbance can be reduced is realized.
Abstract:
A subject of the invention is a method for orienting a body immobilized in laser tweezers. In the course of performing the method, the body is immobilized by a linearly polarized and focused light and is oriented by rotating the polarization plane of the linearly polarized light.A further subject of the invention are laser tweezers formed of linearly polarized and focused light; the laser tweezers are provided with means for rotating the polarization plane of the light beam.Another subject of the invention is a unit which complements the laser tweezers and which includes a rotatable λ/2 plate (1) and, if required, a λ/4 plate (8), both positionable in the light path of the laser light source.
Abstract:
Methods and apparatus for providing coherent atom population transfer using coherent laser beam pairs in which the frequency difference between the beams of a pair is swept over time. Certain examples include a Raman pulse adiabatic rapid passage sweep regimen configured to be used as a beamsplitter and combiner in conjunction with an adiabatic rapid passage mirror sweep or a standard Raman mirror pulse in a 3-pulse interferometer sequence.
Abstract:
The invention relates to an optical tweezer device including at least one light source (2) and one three-dimensional optical trap (9,10), said optical trap comprising one focusing micro-mirror (7) which is adapted to reflect and focus at least a portion of the light (1) emitted by said light source.
Abstract:
A method and apparatus are disclosed for forming an optical trap with light directed through or above a semiconductor material. A preferred embodiment selected light - trapping wavelengths that have lower absorption by the semiconductor. A preferred embodiment provides for an optical trapping through semiconductor employing a thin silicon (Si) wafer as a substrate. Further embodiments of the invention provide for microchannel fabrication, force probe measurement, sorting, switching and other active manipulation and assembly using an optical trap.