The present subject matter described herein relates to a Magnetically Augmented Plasmonic Tweezer (MAPT), a method for fabrication of the MAPT, and a method for trapping and maneuvering one or more colloidal particles inside a fluid. The fluid may correspond to a fluid inside a microfluidic device or a biological fluid. The MAPT can comprise a helical support structure to provide maneuverability in fluid. Further, a magnetic component is integrated in the MAPT for motion control. Plasmonic nanostructures are integrated in the MAPT for optical trapping of particles.

A device for controlling trapped ions includes a first substrate. A second substrate is disposed over the first substrate. One or a plurality of first level ion traps is configured to trap ions in a space between the first substrate and the second substrate. One or a plurality of second level ion traps is configured to trap ions in a space above the second substrate. An opening in the second substrate is provided through which ions can be transferred between a first level ion trap and a second level ion trap.

An ultra-high-vacuum (UHV) cell includes an integrated guide stack (IGS) as part of a boundary between an internal vacuum and an external ambient. The IGS is formed by bonding together plural integrated guide components (IGCs). Each IGC includes (prior to the bonding) electrical and/or electro-magnetic (EM) guides defined within a bulk material such as glass or silicon. The electrical guides can be, for example, conductive paths or vias, while the EM guides can include microwave or other RF guides, optical fibers and/or paths along which an index of refraction has been modified along an desired optical path. EM and electrical connections between IGCs can be formed after the IGCs are bonded together to form the IGS. Use of an IGS as a vacuum boundary can provide substantial functionality for manipulating and interrogating quantum particles; the functionality can include, for example, the ability to regulate fields within the UHV cell.

An ultra-high-vacuum (UHV) cell includes an integrated guide stack (IGS) as part of a boundary between an internal vacuum and an external ambient. The IGS is formed by bonding together plural integrated guide components (IGCs). Each IGC includes (prior to the bonding) electrical and/or electro-magnetic (EM) guides defined within a bulk material such as glass or silicon. The electrical guides can be, for example, conductive paths or vias, while the EM guides can include microwave or other RF guides, optical fibers and/or paths along which an index of refraction has been modified along an desired optical path. EM and electrical connections between IGCs can be formed after the IGCs are bonded together to form the IGS. Use of an IGS as a vacuum boundary can provide substantial functionality for manipulating and interrogating quantum particles; the functionality can include, for example, the ability to regulate fields within the UHV cell.

A system is described that exhibits the functionality of a beam-splitter, typically an optical device that splits a beam of light in two. In this case, the beams are acoustic pulses and can lead to the creation of a Wannier-Mott exciton: a bound state of an electron and an electron hole whose attraction to each other is maintained by the electrostatic Coulomb force. This exciton beam-splitter is lossy (i.e., involves the dissipation of electrical or electromagnetic energy). Half of the time the exciton is radiated away. Nevertheless, if the exciton is not lost, the exciton is now in a superposition of two states that can be well separated in position. Four such beam-splitters can be used to make an exciton interferometer that uses the interference patterns from the interacting acoustic pulses to extract information.

A system is described that exhibits the functionality of a beam-splitter, typically an optical device that splits a beam of light in two. In this case, the beams are acoustic pulses and can lead to the creation of a Wannier-Mott exciton: a bound state of an electron and an electron hole whose attraction to each other is maintained by the electrostatic Coulomb force. This exciton beam-splitter is lossy (i.e., involves the dissipation of electrical or electromagnetic energy). Half of the time the exciton is radiated away. Nevertheless, if the exciton is not lost, the exciton is now in a superposition of two states that can be well separated in position. Four such beam-splitters can be used to make an exciton interferometer that uses the interference patterns from the interacting acoustic pulses to extract information.

A system and method for controlling particles using projected light are provided. In some aspects, the method includes generating a beam of light using an optical source, and directing the beam of light to a beam filter comprising a first mask, a first lens, a second mask, and a second lens. The method also includes forming an optical pattern using the beam filter, and projecting the optical pattern on a plurality of particles to control their locations in space.

A neutron capture therapy system, including a beam shaping assembly and a vacuum tube. The beam shaping assembly includes a beam entrance, an accommodating cavity accommodating the vacuum tube, a moderator adjacent to an end of the accommodating cavity, a reflector surrounding the moderator, a radiation shield disposed in the beam shaping assembly, and a beam exit. A target is disposed at an end of the vacuum tube, nuclear reactions occur between the target and a charged particle beam entering through the beam entrance to generate neutrons. The moderator moderates the neutrons, the reflector guides deflected neutrons back to the moderator. The moderator at least includes two cylindrical moderating members with different outer diameters respectively, the moderator has a first end close to the beam entrance and a second end close to the beam exit, and the target is accommodated between the first end and the second end.

Methods and dispensers for dispensing atomic objects are provided. An example method for dispensing atomic objects includes sealing a reaction component at least partially coated with a composition comprising the atomic objects inside an oven; and, with the oven disposed within a pressure-controlled chamber, heating the composition to an atomizing reaction temperature to cause an atomizing chemical reaction to occur. The reaction component comprises a material that is a participant in the reaction. A result of the reaction is elemental atomic objects deposited on a depositing surface within the oven. The atomizing reaction temperature is greater than a dispensing threshold temperature. The method further comprises allowing the oven to cool below the dispensing threshold temperature; and heating the oven to a dispensing temperature to cause the elemental atomic objects to be dispensed from the oven through a dispensing aperture. The dispensing temperature does not exceed the dispensing threshold temperature.

A device comprises thermal atomic source(s), atom interference lasers, and additional laser beam(s). The thermal atomic source(s) provide atomic beam(s). The atom interference lasers are disposed to provide interrogation laser beams that interrogate the atomic beam(s) to assist in generating atom interference. The interrogation laser beams are configured so as to enable a first speed selectivity and/or angle selectivity of a set of atoms used in the atom interference by restricting the set of atoms. The additional laser beam(s) are configured in such a way that, combined with the speed and/or the angle selectivity of the atom interference lasers, achieve a second speed selectivity and/or angle selectivity of the set of atoms that contribute to a final detected interference signal by restricting the set of atoms to a second speed-angle phase space, where the first speed-angle phase space and the second speed-angle phase space intersect to enhance signal stability.