134 results about "Electron excitation" patented technology

A microscope system comprising an adjusted specimen and a microscope body, wherein the adjusted specimen is dyed with molecule which has three electronic states including at least a ground state and in which an excited wavelength band from the first electron excited state to the second electron excited state overlaps a fluorescent wavelength band upon deexcitation through a fluorescence process from the first electron excited state to a vibrational level in the ground state. There is provided a novel microscope system which is enabled to condense an erase light for exciting a molecule in the first electron excited state to the second electron excited state in an excellent beam profile by using a simple, compact optical system and which has high stability and operability and an excellent super-resolution.

The present invention provides various embodiments of a double-resonance-absorption microscope which realizes a super-resolution by using double resonance absorption. In particular, a double-resonance-absorption microscope includes a light source for a pump light of a wavelength λ₁ which excites a sample molecule to a first electronic excited state from a ground state, a light source for an erase light of a wavelength λ₂ which excites the sample molecule to a second electronic excited state or a higher excited state from the first electronic excited state, and an overlap component for partially overlapping irradiating areas of the pump light and the erase light with each other. An emission area upon deexcitation of the sample molecule to the ground state from the first electronic excited state is partially inhibited by irradiating the pump light and the erase light through the overlap means. On an optical path of the erase light, a spatial filter is provided which has a condenser lens, a collimate lens, and a pinhole therebetween, and performs condensing of the erase light onto the pinhole by the condenser lens and collimating of the erase light passed through the pinhole into a parallel beam by the collimate lens.

The invention relates to a femtosecond laser-controlled silicon surface nanopillar preparation method based on dual-wavelength electronic dynamic control, and belongs to the technical field of femtosecond laser application. The method comprises the steps that on the basis of local instant electronic exciting dynamic control, the wave length of the fundamental frequency laser is converted into 400 nm from 800 nm through a frequency doubling technology, and the surface micro-nano structural morphology is controlled by adopting a dual-wavelength femtosecond laser, wherein a first beam generates a generic plasma lens structure (PL) on the surface of a material, a second beam generates surface plasma along the edge of the generic PL structure and generates a gradient field distributed along the center of a light spot, and then the material generates the force extruding towards the center under the action of the pulse to form a convex nanopillar structure; preparation of large-area uniform nanopillar arrays is achieved through control over a procedure of a processing platform. Compared with an existing method, the preparation method has the advantages that the nanopillar processing precision and processing efficiency are effectively improved, efficient and precise control over the crystalline silicon surface nano structure is achieved, and the application value on the aspects such as information storage and solar cells is achieved.

Systems and methods for hyper-resolution beyond the diffraction limit of optical microscopes for applications in spectroscopy, absorption and lithographic photochemical patterning are described. These systems are based on interference of a pump pulse and a Stokes laser pulse which interfere to localize the population of an excited vibrational state in an area that is smaller than the scanning resolution of the microscope. Another (interfering) Stokes pulse has an annular shape at focus and destructively interferes with the the Stokes laser pulse. This destructive interference causes narrowing of the population distribution of the vibrational excited state well below the diffraction limit, which in turn localizes the population of the central electronic excited state by a separate actinic laser pulse having a lower energy than the ground state excitation energy of the molecule.

A stepped photolithography system uses two photomasks to produce photoresist images capable of printing features smaller than 10 nm.

The present invention provides an excitation source which may be used, for example, in conjunction with the scanning of multi-channel electrophoresis chips or capillary arrays. The excitation source is comprised of a source of light, such as a laser beam. A beam expander, an acousto-optic deflector, and a filter are optically aligned with the source of light. A driver is connected to the acousto-optic deflector for controlling the angle of deflection. A system is disclosed which includes the excitation source, a detector for detecting fluorescence from a target chip, and a beam splitter or other device for optically connecting the excitation source to the chip and for optically connecting the chip to the detector. The excitation source may be based on an acousto-optic deflector, an electrooptic deflector, a piezoelectric deflector, or any other electronically controlled device. Methods of focusing a beam of collimated light and electronically exciting a plurality of micro-areas of a target chip, either serially or in parallel, are also disclosed.

An article of manufacture for a magnetically induced photovoltaic solar cell device and the process for creating the magnetic and/or electromagnetic field(s) utilizing a basal underlying structure consisting of the body of any and all types of photovoltaic solar cell devices within which a magnetic and/or electromagnetic field will be created and/or generated through the overlayment of the previously mentioned photovoltaic device structure with a magnetic inducement layer and/or coating which is comprised of a carrier/binding medium and magnetic particle inclusions. The addition of the magnetic inducement layer serves the specific purpose of creating and/or generating greater photon and electron excitement, retention and absorption within the crystalline matrix of the underlying photovoltaic solar cell device.

[Task] To provide a super-resolution microscope whereby the light source of pump light and erase light can be selected easily and a super-resolution can be reliably achieved through a simple and inexpensive arrangement.

[Solution of the Task] A super-resolution microscope includes an optical system (3, 4, 9) for combining a part of a first coherent light from a first light source (2) and a part of a second coherent light from a second light source (1) and focusing the coherent lights onto a sample (10), scanning means (6, 7) for scanning the coherent lights, and detecting means (16) for detecting an optical response signal from the sample (10). The microscope is configured so as to satisfy the following conditions:

σ₀₁Ipτ≦1, and

0.65(λe/λp)≦τσ_dipIe

where λp is the wavelength of the first coherent light, λe is the wavelength of the second coherent light, τ is the excited lifetime in which the molecule is excited by the first coherent light from the ground state to the first electron-excited state, Ip is the maximum photon flux on the sample surface of the first coherent light, Ie is the maximum photon flux on the sample surface of the second coherent light, σ₀₁, is the absorption cross-sectional area when the molecule is exited from the ground state to the first electron-excited state, and σ_dip is the fluorescence suppression cross-sectional area.

The present invention is a semiconductor apparatus for white light generation and amplification, where, under different current bias, white light can be generated steadily and evenly by folding up multi-wavelength quantum wells and by side-injecting a current. And, the white light can be excited out electronically without mingling with a fluorescent powder so that the cost for sealing is reduced. Because the light is directly excited out by electricity to prevent from energy loss during fluorescence transformation, the light generation efficiency of the present invention is far greater than that of the traditional phosphorus mingled with light-emitting diode of white light. Besides, concerning the characteristics of the white light, the spectrum of the white light can be achieved by adjusting the structure and/or the number of the quantum wells while preventing from being limited by the atomic emission lines of the fluorescent powder.

The invention provides a method for measuring a dual-jet direct-current arc plasma space temperature field in real time, and belongs to the technical field of hot plasma temperature measurement. The method is characterized in that in a real-time measurement system, internal and external parameters of given cameras are worked out, calibration and stereo correction are conducted, two matched target images preprocessed through a set parallax deviation are obtained, the intensities of spectral lines on corresponding pixel points at the same moment are obtained from a spectrograph, a gray value-spectral line intensity mapping table is built, and the electron excitation temperature of a spatial point corresponding to the similar spectral lines is calculated through the relative intensities of the spectral lines, wherein the real-time measurement system is composed of a plasma generator, an image information acquisition device, a spectrum acquisition device and a computer, the image information acquisition device is formed by splicing the two CCD cameras, optical filters with different central wavelengths are arranged in front of lenses on the two sides, the spectrum acquisition device is mainly composed of the spectrograph, and the computer is connected with a triggering signal output card used for synchronously triggering the two CCD cameras and the spectrograph. The method is simple and feasible, the resolution ratio and temperature measurement accuracy are high, and dynamic performance is good.

The invention discloses a femtosecond time resolved excited Raman spectrum system, which can be used for detecting the vibration dynamics of the molecular electron base state, can also be used for detecting the vibration dynamics of the molecular electron excitation state, and can give out rich information relevant to molecular electron excitation state properties, particularly vibration excitation state dynamics. The Raman spectrum system generates excitation light, Raman pumping light and detection light; a spectrum instrument can perform double chopping modulation on the excitation light and the Raman pumping light, and can control the time sequence of the excitation light, Raman pumping light and detection light reaching the samples. The wavelength of the Raman pumping light can be continuously tuned; the whole-frequency excited Raman spectrum from visible light to near ultraviolet waveband can be obtained; in addition, the proper wave length can be selected to effectively avoid the fluorescence interference; the intensity of the excited Raman spectrum can be improved under the resonance conditions; the defects of low sensitivity and fluorescence interference of the conventional Raman spectrum are overcome.

Disclosed are highly efficient multiphoton absorbing compounds and methods of their use. The compounds generally include a bridge of pi-conjugated bonds connecting electron donating groups or electron accepting groups. The bridge may be substituted with a variety of substituents as well. Solubility, lipophilicity, absorption maxima and other characteristics of the compounds may be tailored by changing the electron donating groups or electron accepting groups, the substituents attached to or the length of the pi-conjugated bridge. Numerous photophysical and photochemical methods are enabled by converting these compounds to electronically excited states upon simultaneous absorption of at least two photons of radiation. The compounds have large two-photon or higher-order absorptivities such that upon absorption, one or more Lewis acidic species, Lewis basic species, radical species or ionic species are formed.

Light resonant with an electronic excitation level of nanosize objects is projected onto a plurality of closely located nanosize objects, such as quantum dots, quantum dot pairs, and a carbon nanotube, in a collection of nanosize objects is disclosed. In so doing, to control the mechanical interaction induced between the nanosize objects, the projected resonant light is changed in polarization. This enables the collective manipulation of the nanosize objects.

A two-chamber electron impact emission sensor effective for monitoring vapor flux of materials in the presence of interfering species is described. The sensor includes two independent electron excitation regions and one photodetector for monitoring emission from excited species from both chambers. Copper vapor flux from an evaporation source was accurately measured in the presence of interfering H₂O vapor, and Ga vapor flux from an evaporation source was accurately monitored in the presence of interfering CO₂ gas. The invention permits deposition rates to be monitored using electron-impact emission spectroscopy with significantly improved accuracy in the presence of interfering gases at high partial pressures.

The invention relates to an excimer broadband pumped alkali metal blue laser, comprising a pump source a, a pump source b, an alkali metal vapor pool, a heating furnace, a high reflectivity mirror, and an output coupling mirror. The alkali metal laser is suitable for using an alkali metal such as potassium, rubidium or caesium as a gain medium. By means of the cascade pumping method, the pump source a outputs a narrow linewidth laser to excite the alkali metal of the n2P3/2 level. The first electronically excited alkali metal and inert gases form an A2pi3/2 level excimer with a higher bindingenergy, and a pump source b outputs a wide linewidth laser to excite the A2 pi 3/2 level excimer to the I2 sigma +1/2 level. The I2 sigma +1/2 level is rapidly decomposed into inert gases and alkali metal atoms of the (n+1)2P3/2 level. The alkali metal atoms return to the n2S1/2 level from the (n+1)2P3/2 level, directly producing blue laser. Through the method, an alkali metal blue laser can be applied to the field of high-energy blue laser; and extended to a violet laser or other laser with a shorter wavelength. In the method, a laser structure is similar in design to current diode-pumped alkali metal lasers and is easy to implement.

The invention relates to a fast neutron image detection device and a manufacturing method of a fast neutron detector array, and belongs to the technical field of fast neutron detection. The fast neutron image detection device comprises the fast neutron detector array which is constituted by a plurality of glass capillaries; the outer wall of each glass capillary is plated with a reflective film, and thus light is constrained in the current glass capillary and only transmitted to the two ends of the current glass capillary; and each glass capillary is filled with a ray sensitive material, thusfast neutrons and light nucleus in the ray sensitive materials generate elastic scattering, recoil charged nucleus enable organic molecules pi to be subjected to electron excitation on a flight path,the ground state is jumped into the excitation state, and glowing is conducted in a de-excitation mode. The outer wall of each glass capillary is plated with the reflective film, reflective layers exist, thus the visible light generated in each glass capillary is almost entirely transmitted to the two end faces of the glass capillary, and the problem of crosstalk of the light between the glass capillaries is avoided accordingly.

A device including a first substrate and a second substrate facing each other, and including a plurality of cells defined between the first and second substrates, an electron accelerating and emitting unit, disposed between the first and second substrates, for accelerating and emitting electrons, a gas including N₂ within the cell, the gas capable of being excited by the electrons emitted by the electron accelerating and emitting unit to generate ultraviolet light, and a light emitting layer disposed on an outer surface of one of the first and second substrates, the light emitting layer capable of being excited by the ultraviolet light to generate visible light.

For spatial high resolution imaging of a structure of a sample comprising a luminophore, the sample is subjected to excitation inhibiting light transferring the luminophore out of an excitable electronic ground state into a protection state in which the luminophore is protected against electronic excitation by luminescence excitation light and luminescence de-excitation light. The excitation inhibiting light comprises a first local minimum. Next, the sample is subjected to the luminescence excitation light exciting the luminophore within the first local minimum into an excited luminescent state. Then, the sample is subjected to the luminescence de-excitation light returning the luminophore out of the excited luminescent state into the excitable electronic ground state. The luminescence de-excitation light comprises a second local minimum overlapping with the first local minimum. Luminescence light emitted out of the measurement area is measured and assigned to the position of the second local minimum within the sample.

The invention relates to a nanosecond time-resolved absorption and emission spectrum measuring device. An excitation light source is orderly connected with a first sequence pulse generator, a working frequency coordinator, a second sequence pulse generator, and a data collector; the second sequence pulse generator is respectively connected with a light path system and a detection light source; the data collector is respectively connected with the working frequency coordinator, a first light intensity detector, a second light intensity detector, a third light intensity detector, and a monochromator; the light path system and a sample cell are also disposed between the detection light source and the monochromator. The measuring method comprises: setting the temperature of a sample, irradiating the sample by light beams emitted by the excitation light source to reach an electron excitation state, obtaining zero point time of time-resolved spectrum data by part of the light beams; after pulsed white light emitted by the detection light source passes through the sample, feeding back detection light intensity signals to the data collector, and converting the signals into absorption and emission spectra. The measuring device of the invention is equipped with a temperature controllable sample cell, and obtains spectrum data with a high signal to noise ratio.

The invention relates to an electroluminescent device. The electroluminescent device comprises an electron emission layer, an energy storage reflective layer, an electron excitation layer, an electronrecovery layer, a first electrode and a second electrode, wherein the electron emission layer is made of conductive silver paste, and the conductive silver paste is formed by mixing a mixture of silver nanoparticles and silver nanowires with a high polymer material; the energy storage reflective layer is attached to the electron emission layer; the electron excitation layer is attached to the energy storage reflective layer; the electron recovery layer is attached to the electron excitation layer; the first electrode is attached to the electron emission layer; and the second electrode is attached to the electron recovery layer. The electroluminescent device provided by the invention is a low-voltage electroluminescent device, and the potential safety hazard of the electroluminescent device can be reduced and the application field is broadened within the range of the operating voltage safe to the human body.

A conductive polymer-metal complex becomes to be adhered simply and strongly on the surface of a substrate such as PTFE. By subjecting a solution containing a monomer which provides a conductive polymer, an anion, and a metal ions such as Ag⁺, Cu²⁺, Cu⁺ and the like to an irradiation with light having an energy required for exciting an electron to an energy level capable of reducing the metal ion, such as ultraviolet light, under an appropriated condition, thereby precipitating the conductive polymer-metal complex as being dispersed in the reaction liquid. By supplying this dispersion liquid onto various substrates, the complex microparticles in the dispersion liquid enter into and mate with the narrow holes on the surface of the substrate. As a result, the complex precipitate formed on the surface of the substrate and the substrate can be adhered strongly to each other.

Luminance life can be enhanced in a vacuum fluorescent display that is driven according to a dynamic drive scheme and that uses a phosphor having remarkable luminance saturation. A drive method for a vacuum fluorescent display, having causing a phosphor layer formed on an anode to display under low-energy electron excitation by the dynamic driving, wherein the phosphor included in the phosphor layer is a phosphor in which the luminance increases when a pulse width is reduced under conditions in which the Du is kept the same in the dynamic driving, and in which, after a voltage is applied to the anode and the luminance of the phosphor is saturated, the time at which the luminance value decreases to 10% of the saturation luminance value following stoppage of the voltage application is 200 μsec or more; and wherein the pulse width and pulse repetition period in the dynamic driving are made variable in the direction of maintaining the initial luminance of the phosphor as driving time elapses.

A photoconductive switch comprises a first layer (1), two contact layers (2, 3) arranged on said first layer and connectable to different potentials for applying a voltage thereacross, said first layer being adapted to be conducting upon applying a voltage across said contact layers when exposed to light from an illumination source of an energy high enough for lifting charge carriers from the valence band to the conduction band of the material of said first layer. The illumination source is an excimer lamp, in which unstable electronically excited dimers are formed when a voltage is applied across first and second electrodes (12, 13) separated by a gas or gas mixture. The dimers so formed decompose into two gas atoms while emitting a photon of an energy suitable for lifting charge carriers from the valence band to the conduction band of the material of the first layer.