摘要:
In a method of moving droplets, local heat is applied to a surface portion of a droplet for an amount of time sufficient to create a Marangoni flow in the droplet. Droplets are suspended in an emulsion in a carrier liquid on a substrate. A laser beam is used to move one of the droplets. the droplet consists of a first substance and a carrier liquid consists of a second substance that is not mixable with the first substance. The droplet is placed in the carrier liquid, and the mixture is emulsified. The emulsified mixture is placed on a substrate. Then the local heat is applied to the surface of the droplet. The first substance may include oil and the second substance may include water.
摘要:
A method and system for detecting ratios and amounts of isotopes of noble gases. The method and system is constructed to be able to measure noble gas isotopes in water and ice, which helps reveal the geological age of the samples and understand their movements. The method and system uses a combination of a cooled discharge source, a beam collimator, a beam slower and magneto-optic trap with a laser to apply resonance frequency energy to the noble gas to be quenched and detected.
摘要:
A method for manipulating a plurality of objects. The method includes the steps of providing a shaping source, applying the shaping source to create a spatially symmetric potential energy landscape, applying the potential energy landscape to a plurality of objects, thereby trapping at least a portion of the plurality of objects in the potential energy landscape, spatially moving the potential energy landscape to manipulate the plurality of objects; and extinguishing the potential energy landscape, thereby causing the plurality of objects to move freely when the potential energy landscape is extinguished.
摘要:
A fluidic device includes an arrangement of channels for introducing a sample containing particles of interest into a processing chamber. The chamber is in fluid communication with collecting channels via low-flow connection channels. Particles in the sample may be observed and diverted from the processing chamber by application of a motive force such as optical trapping into a collection channel. Once in the collection channel, particles can be collected, including by trapping in a porous matrix.
摘要:
A system for forming an optical trap comprising two or more photonic crystal fibers (PCFs) and at least one source of radiation for inputting radiation to the photonic crystal fibers, the fibers being operable to provide counter-propagating outputs for forming the optical trap.
摘要:
A photon engine and variations thereof and methods of operating the photon engines, the photon engines comprising a primary prism and a secondary prism, the method and apparatus repeatedly imparting linear momentum to multiple reflective surfaces of the photon engine communicating with an energy system.
摘要:
A method and apparatus for selecting a specific fraction from a heterogeneous fluid-borne sample using optical gradient forces in a microfluidic or fluidic system are presented. Samples may range in size from a few nanometers to at least tens of micrometers, may be dispersed in any fluid medium, and may be sorted on the basis of size, shape, optical characteristics, charge, and other physical properties. The selection process involves passive transport through optical intensity field driven by flowing fluid, and so offers several advantages over competing techniques. These include continuous rather than batch-mode operation, continuous and dynamic tunability, operation over a wide range of samples, compactness, and low cost.
摘要:
A trapping position 30 is defined on a substrate 1, and an electrode pattern 2 is formed on the substrate 1, having a first pair of electrodes 21 including electrodes 22 and 23 formed at positions opposite each other with the trapping position 30 placed therebetween along a diagonal x-axis, and a second pair of electrodes 26 including electrodes 27 and 28 formed at positions opposite each other with the trapping position 30 placed therebetween along a y-axis orthogonal to the x-axis. The atomic device alternately switches between a first state and a second state to trap a neutral atom at the trapping position 30; in the first state, the electrode 22 of the first pair of electrodes 21 is set at a positive potential +V0 with respect to a reference potential and the electrode 23 is set at a negative potential −V0, and in the second state, the electrode 27 of the second pair of electrodes 26 is set at the positive potential +V0 and the electrode 28 is set at the negative potential −V0. This allows for realizing an atomic device which can facilitate integration of atomic circuits and reduce disturbances or the like.
摘要:
An apparatus for producing a nuclear spin-polarized noble gas by spin-polarizing a noble gas in the presence of an optical pumping catalyst under application of magnetic field and laser light, including a cell having a thin reaction chamber, a gas introduction conduit connected in fluid communication with the reaction chamber for feeding the noble gas, a gas discharge conduit connected in fluid communication with the reaction chamber, a first gate valve having an outlet port connected to the gas introduction conduit and an inlet port adapted to be in fluid communication with a noble gas introduction line, a second gate valve having an inlet port connected to the gas discharge conduit and an outlet port, and a capillary tube removably connected to the outlet port of the second valve for recovering a nuclear spin-polarized noble gas produced in the reaction chamber. The apparatus may be directly connected to NMR or MRI.
摘要:
An apparatus and method for determining the coordinates of a body, where the coordinates express the body's inertial or kinematic properties, including, for example, its trajectory. The apparatus and method employ atom interferometers provided in a body frame X of the body whose inertial or kinematic properties are to be studied. During operation, interfering entities used by the atom interferometers are released into a known frame X′, such as an inertial frame or the Earth frame Xe, that is decoupled from the body frame X and an optical pulse sequence is applied to the interfering entities to affect the quantum-mechanical matter-wave phases of the interfering entities as a function of the coordinates. Under these conditions, the coordinates of the body are determined from the phases of the atom interferometers and analytic expressions for the trajectories of the interfering entities under the simultaneous action of the gravity gradient, Coriolis and centrifugal forces.