51 results about "Resonance tunneling" patented technology

The present invention provides a method and apparatus for determining the identity of a monomeric residue of a biopolymer. The apparatus comprises a substrate having a nanopore, a potential-producing element for producing a ramped potential across electrodes adjacent to the nanopore, and a quenchable excitable moiety adjacent to the nanopore. As a biopolymer passes through the nanopore, the identity of monomeric residues of a biopolymer may be determined by detecting changes in (a) current across the electrodes and (b) a signal of the quenchable excitable molecule. The subject method and apparatus find use in determining the identity of a plurality of monomeric residues of a biopolymer, and, as such, may be employed in a variety of diagnostic and research applications.

A microstrip stabilized quantum well resonance-tunneling generator which generates electromagnetic waves for millimeter and submillimeter wavelength range is provided The generator includes a resonant tunneling semiconductor quantum well diode, and a microstrip resonator. The resonant tunneling diode, the microstrip resonator and interconnecting lines and junctions are fabricated as a monolithic integrated device on a common substrate. As a result, the monolithic integrated device provides the expansion of the operation frequency range toward the terahertz region as a result of reduction of the parasitic inductance as well as of minimizing the other parasitic parameters of the electric circuitry connecting the resonant tunneling diode and resonator.

A novel micro-accelerometer based on the mesoscopic piezoresistive effect is mainly and structurally composed of a bonding substrate, a sensitive mass block, a supporting frame body, resonant tunneling devices and combined beams. Each resonant tunneling deice is composed of a resonant tunneling material thin film layer, a resonant tunneling device positive pole and a resonant tunneling device negative pole. Each combined beam is composed of a detection beam, a connection block and a transverse buffering beam. The bonding substrate serves as a carrier, the supporting frame body is bonded on the bonding substrate, the center position of each of the four edges of the supporting frame body is connected with one combined beam, one combined beam is connected to the center position of each of the four edges of the sensitive mass block, the other sides of the combined beams are connected with the supporting frame body, and each combined beam is composed of the detection beam, the connection block and the transverse buffering beam. Each resonant tunneling material thin film layer is of a multi-potential-barrier voltage-sensitive structure and can enable the sensitivity of a silicon piezoresistive device to be improved by 1-2 orders of magnitude. The novel micro-accelerometer based on the mesoscopic piezoresistive effect is reasonable and compact in structure, convenient to detect, high in precision, good in reliability and suitable for miniaturization, and has strong lateral resistance.

The invention discloses a detuning feed slot antenna based on a resonance tunneling mechanism, and belongs to the field of antennas. The detuning feed slot antenna based on the resonance tunneling mechanism comprises a detuning feed slot antenna body and a RTD. The resonance tunneling diode serves as an excitation device and is used for generating terahertz waves, and the detuning feed slot antenna body serves as an electromagnetic wave transmitting device and is used for transmitting the terahertz waves generated by the resonance tunneling diode out. The top electrode of the RTD is connected with a left electrode of the detuning feed slot antenna body through a heat sink, and the bottom electrode of the RTD is connected with the right electrode of the detuning feed slot antenna body. The detuning feed slot antenna based on the resonance tunneling mechanism has important application in the fields of superspeed data link transmission, wireless communication, military and national defense and the like.

It is resonance tunneling micro mechanical force sensor and its process method, which belongs to micro mechanical system and sensor technique field. This invention discloses a resonance tunneling micro mechanical force sensor, which mainly comprises upper and down silicon pad, wherein, the upper silicon pad has grown tunneling positive electrode on down surface; the down silicon pad has grown tunneling negative electrode in the upper surface at relative position area. The tunneling negative electrode surface grows multiple thin films of tunneling knots. The multiple structures is formed by isolation layer material and metal material alternately or by different gap semi-conductive material. This invention also discloses the process method of the said micro mechanical force sensor.

The invention discloses a light emitting diode with an electron blocking layer in a resonant tunneling structure. The light emitting diode comprises a substrate, an n-type nitride layer, a multiple quantum well layer, the electron blocking layer, a p-type nitride layer and a p-type nitride ohmic contact layer, an n-type electrode which is arranged on the n-type nitride layer, and a p-type electrode which is arranged on the p-type nitride layer, wherein the substrate, the n-type nitride layer, the multiple quantum well layer, the electron blocking layer, the p-type nitride layer and the p-type nitride ohmic contact layer are arranged in order from the bottom up. The electron blocking layer is composed of a p-type doped nitride barrier layer, a non-doped nitride potential well layer, and a non-doped barrier layer which increases the hole transmittance through a resonance tunneling effect, wherein the p-type doped nitride barrier layer, the non-doped nitride potential well layer and the non-doped barrier layer are arranged in order from bottom to top. The light emitting diode provided by the invention has the advantages that electrons are effectively prevented from passing through an active region into a p-type region, which increases the injection efficiency of a hole into the active region through the electron blocking layer; a good electronic blocking effect is realized through a simple growth mode and less layer structures; and the hole injection efficiency significantly higher than a traditional electronic blocking layer structure is acquired.

The utility model discloses a method for preparing the GaMnN diluted magnetic semiconductor nanowire, comprising the following steps: 1) Mn doping: Mn is in-situ doped on the Ga2O3 nanowire; 2) ammonification: the Ga2O3 nanowire doped with the Mn is aminated in the ammonia atmosphere to obtain the GaMnN diluted magnetic semiconductor nanowire. The utility model has the advantages of simple method, low requirement for the equipment, strong ferromagnetism of the prepared GaMnN nanowire, higher Curie temperature than the ambient temperature, controllable magnetic doping concentration, high purity of the nanowire, high output and controllable linear (the nanowire with diameter varying from tens of nanometer to hundreds of nanometer is prepared through adjusting the growing parameters such as air pressure). The utility model is applied for producing the nanometer spin electronic devices, such as spin field effect transistor (spin-FET), spin light emitting diode (spin-LED) and spin resonance tunneling device (spin-RTD) and has broad application prospect.

The invention relates to a transistor based on the resonance tunneling effect of double-barrier tunnel junction, comprising: substrate, emitter, base, collector, and first and second tunnel barrier layers, where the first one is arranged between the emitter and base and the second one is between the base and collector; and the areas of tunnel junctions formed between the emitter and base and between the base and collector are 1 sq um-10,000 sq um; thickness of the base is comparable with free stroke of electrons of its material; only one of the emitter, base and collector has a free magnetization direction. Because of double barrier structure, the invention overcomes Schottky barrier generated between the base and collector, where the base current is modulation signal, and makes modulation modes of collector signal and base current similar by changing the magnetization direction of the base or collector, thus making the resonance tunneling effect, and can obtain an amplified signal on proper conditions.

The invention discloses a method for manufacturing nitride gradient energy gap resonance tunneling ohmic contact. According to the method, an AlGaN/GaN heterostructure 2, an AlGaN gradient energy gap depletion layer 3 and a heavy doping GaN cap layer 4 are sequentially grown on a substrate 1 so as to manufacture the ohmic contact; the heavy doping GaN cap layer 4 can reduce the contact barrier of a metal-semiconductor; the gradient energy gap depletion layer 3 forms a middle trap to reduce the resistance of the ohmic contact through the resonance tunneling. According to the invention, by the design of the middle trap of the a gradient energy gap, the metal-semiconductor contact barrier generated in the high-temperature alloy process is separated from the heterojunction barrier, and energy bands of double-barrier and single-trap heterostructures are optimally designed respectively, so that the tunneling current is obviously increased, and the ohmic contact is reduced. Meanwhile, with the design of the heavy doping GaN cap layer, the high-temperature alloy process is omitted; the surface appearance, the device performance and the reliability of the contact are improved.

The invention discloses a method for increasing the dynamic range of a quantum dot resonance tunneling diode photodetector, and the hardcore of the structure thereof comprises a GaAs or InGaAs incident photon absorption layer, InAs self-assembly quantum dots with order of magnitude being 10<10>cm<-2> to 10<11>cm<-2> and an AlGaAs/GaAs double-potential-barrier structure layer; the core of the technology thereof is improved to extend the annealing time of the technique of the crisscross bridge resonance tunneling diode device so as to lead ohmic contact to diffuse to the double-potential-barrier structure layer; the core inventive point of the detecting approach thereof is that a longitudinal current branch of an original tunneling diode which is sensitive to small photons is kept, simultaneously, another transverse current which consists of two-dimensional electron gas is educed from a quantum well and can reflect the continuous variation of incident light intensity when suffering intensive modulation from a quantum dot electric field. The device of the invention has the advantages that the improvement of both the structure and the technology of the device can be compatible with the original equipment while the multiphoton detection sensitivity is greatly improved compared with the original device.

The invention belongs to the technical field of small molecular diagram water, and particularly relates to a terahertz water quality enhancement activation instrument. The instrument comprises a watercontainer and an activation device, the activation device is arranged on the water container and can activate liquid water contained in the water container by emitting terahertz waves; the activationdevice comprises a control unit, at least one resonance tunneling diode and a peripheral circuit corresponding to the resonance tunneling diode. The resonance tunneling diode can form an oscillationloop with the peripheral circuit under the control of the control unit so as to generate the terahertz waves. The terahertz water quality enhancement activation instrument not only can efficiently activate liquid water through the terahertz waves, but also can maintain the activation state of the water body through infrared radiation, mineral element bonding or molecular low-frequency resonance and other methods, and has the technical effects of high activation efficiency, good activation effect, high safety coefficient and the like.

The invention discloses a nitride resonance tunneling diode structure suitable for ultraviolet light detection, and solves the problems that a conventional nitride resonance tunneling diode structureis not suitable for a thick light absorption layer and cannot perform ultraviolet light detection with high quantum efficiency. According to the invention, a double-barrier resonance tunneling structure is arranged in a p type doped nitride epitaxial layer/intrinsic nitride epitaxial layer/n type doped nitride epitaxial layer, and a built-in polarization electric field of a nitride heterojunctionis counteracted by using the built-in electric field of the p-i-n structure, so that the problem of energy band uplift of the GaN thick light absorption layer is solved, and the nitride resonance tunneling diode structure of the thick light absorption layer can generate resonance tunneling; and an AlGaN/GaN superlattice structure is introduced, and the alignment of a quantum well energy level anda light absorption layer conduction band energy level is adjusted by using the polarization field of the superlattice structure, so that the peak current of resonance tunneling is enhanced.

The invention provides a middle series connection layer and a production method thereof, and a laminated photovoltaic device and a preparation method thereof, and relates to the technical field of photovoltaics. The middle series connection layer comprises a potential barrier layer and quantum dot structures dispersed in the potential barrier layer. The quantum dot structure dispersed in the barrier layer depends on the quantum confinement effect, a controllable tunneling channel is established in the barrier layer, the controllable tunneling channel can assist carriers of corresponding energy levels in high-efficiency resonance tunneling, the tunneling efficiency of the corresponding carriers is improved, tunneling current is greatly improved, contact resistance is reduced, the reverse barrier heights of the two sides of the middle series connection layer are reduced, the reduction degree of the overall open-circuit voltage of the laminated photovoltaic device is further reduced, and the overall open-circuit voltage and efficiency of the laminated photovoltaic device are improved. Meanwhile, by means of a discrete energy level structure established in the barrier layer, the contact resistance is effectively controlled, so that the series resistance is relatively low.

The invention discloses a GaAs-base bi-color quantum well infrared detector based on a resonance tunneling effect. The detector is prepared by sequentially growing a lower electrode layer, an active region layer and an upper electrode layer on a GaAs substrate by virtue of a molecular beam epitaxy measure, wherein the active region layer is formed by clamping a resonance tunneling diode structurebetween two different quantum wells. When a specific positive or negative bias is applied to the detector, two waveband light currents produced through the response of quantum wells with different widths selectively run through a resonance tunneling diode so as to form a response loop. Compared with current traditional bi-color quantum well detectors, the GaAs-base bi-color quantum well infrared detector has the advantages that the bi-color detection can be realized through adjusting the direction and size of the applied bias, and the working temperature of the device can be increased; and besides, the preparation process of the detector is relatively simple, and the detector has the important signature to the development of bi-color infrared quantum well detectors.

The invention discloses an anti-staggered-layer heterojunction resonance tunneling field-effect transistor (TFET) and a preparation method thereof. The TFET comprises a tunneling source region, a channel region, a drain region and a control grid located above the channel region, wherein an electronic band structure of a heterogeneous tunneling junction of the tunneling source region and an electronic band structure of a heterogeneous tunneling junction of the channel region are respectively an anti-staggered-layer heterojunction. If the TFET is an N type device, the bottom of a conduction band of the tunneling source region is located below the valence band top of the channel region at the juncture surface of the heterogeneous tunneling junction of the tunneling source region and the heterogeneous tunneling junction of the channel region; if the TFET is a P type device, the valence band top of the tunneling source region is located above the bottom of a conduction band of the channel region. Thus, on-state currents of the TFET can be remarkably increased; meanwhile, off-state currents of the device are effectively suppressed, and a steep subthreshold slope is maintained. According to the preparation method of the TFET, a low-power dissipation integrated circuit formed by TFETs is prepared by effectively using a standard process, production cost is greatly reduced, and the process is simple.

The invention relates to a realization method of a tunable superlattice oscillator. The realization method is characterized in that (1) a current oscillation mode and an oscillation frequency in a superlattice oscillator are regulated by utilizing an externally-added magnetic field and an electric field, wherein, the superlattice oscillator is a weak coupling superlattice based on a resonance tunneling mechanism of a current carrier; (2) the direction of the externally-added magnetic field is vertical to that of the superlattice, the electric field is direct current bias voltage, and the direct current bias is along the growth direction of the superlattice; (3) the direct current bias voltage is fixed on the superlattice oscillator to produce zero damping oscillation current, and then the resonance frequency of the superlattice oscillator is continuously regulated by regulating the externally-added magnetic strength. To sum up, the invention can realize continuous change of the oscillation frequency of the superlattice oscillator by utilizing the regulation of the externally-added magnetic field and the electric field.

The present invention relates to a solid state cooling/power generating device is provided comprising a first and second electrode separated by a vacuum gap. According to the present invention at least one of the electrodes is provided with a nanoscaled semiconductor heterostructure 301, which comprises at least one quantum well which in combination with the vacuum gap 315 forms a double barrier resonance structure providing conditions which allows resonant tunneling between the first and second electrode.