Abstract:
PROBLEM TO BE SOLVED: To provide a spin filter capable of obtaining a sufficient deflection angle of the spin for separating a different spin state which a carrier traveling in a semiconductor has, and to provide a method for separating the spin state. SOLUTION: The spin filter comprises a semiconductor channel comprising a carrier confined within two dimensional region in which a motion space of the carrier in one space dimension direction is negligible small comparing to a motion space in the other two space dimension directions, a space potential modulating means for modulating the potential in the space including the semiconductor channel, a carrier generating means for generating a carrier traveling in the semiconductor in answer to the potential modulated by the space potential modulating means, and an inhomogeneous magnetic field applying means for applying the inhomogeneous magnetic field to the region including at least part of the semiconductor channel through which the carrier generated by the carrier generating means passes. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To easily operate electron spin in any arbitrary direction without complicating a device.SOLUTION: An electron spin operating device comprises: a channel 101 formed from a semiconductor; a spin polarization carrier generation part 102 for generating a spin polarization carrier in a carrier generation location of the channel 101; and a moving part 103 for moving the spin polarization carrier generated by the spin polarization carrier generation part 102 in an extending direction of the channel 101. The channel 101 is formed with a predetermined length and its extending direction is periodically changed in a predetermined period within a predetermined width. Each of these factors indicates the state where an angular frequency of vibration caused by the change in the extending direction of the channel 101 is matched with a spin resonance condition of the spin polarization carrier moving the channel in the extending direction.
Abstract:
PROBLEM TO BE SOLVED: To provide a molecular beam epitaxy (MBE) apparatus which can discharge ammonia gas with high reliability and realizes reaction growth of a group III nitride compound semiconductor, and to provide a method of its operation. SOLUTION: The molecular beam epitaxy (MBE) apparatus comprises: at least one electron beam source 11; a vacuum chamber 10 having at least one injector 12 to inject ammonia into the vacuum chamber 10; a first cold trap unit 20 having at least one cold trap 21 to condense excess ammonia; a pump unit 30 having at least one pump 31 to evacuate the chamber 10; and a barrier unit 40; where the barrier unit 40 can divide the first cold trap unit 20 from the vacuum chamber 10. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a coding unit for a high frequency power amplifier which achieves better energy conversion efficiency even at an output power below the maximum output power of the high frequency power amplifier.SOLUTION: A polar modulation unit 110 is designed to represent an input signal applied to an input of a coding unit 100 as an envelope signal and a binary phasing signal, and a pulse width modulation unit 120 is designed to convert the envelope signal of the polar modulation unit 110 into a pulse-width-modulated envelope signal and to output it to a first input of a multiplier 130. A second output of the polar modulation unit 110 for the binary phasing signal is connected to a second input of the multiplier 130, and the multiplier 130 is designed to perform a logical AND combination of the binary phasing signal and the pulse-width-modulated envelope signal and to output it to an output of the coding unit 100.
Abstract:
Disclosed is a method for freezing a nonmetal melt (130) located in a crucible (120) that is arranged in an apparatus (100) which comprises a plurality of inductors (100) to generate magnetic fields. A first traveling magnetic field (W1) is generated in the melt (130) by feeding a first set of phase-displaced alternating currents (I1a, I2b, I3c, I4d) having a first frequency (f1). A second traveling magnetic field (W2) that travels against the direction of the first traveling magnetic field (W1) is generated in the melt (130) by feeding at least one second set of phase-displaced alternating currents (I2a, I2b, I3c, I4d) having a second frequency (f2). The inductors (100) are disposed on the crucible (120) in a vertical arrangement such that the generated alternating fields (W1, W2) travel through the melt (130) in a vertical direction (Y) and have a minimum flow rate along the wall of the crucible or vessel.
Abstract:
The invention relates to a device consisting of a receptacle which receives the target liquid and inside which a high pressure is generated by means of a non-reactive gas. An electromagnetic valve (1) that is connected to a supersonic nozzle (4) via an expansion channel (2) and switches in the millisecond range is connected to the receptacle. Heating means (3) that are disposed around the expansion channel are configured such that the temperature is adjustable to a level at which an oversaturated vapor is formed inside the expansion channel, an insulator (5) being arranged between the electromagnetic valve and the heating means. The inventive device thus allows highly dense sub-micrometer targets for laser plasma sources to be created for the generation of EUV light or x-rays. The dimension of said targets ranges within the wavelengths of laser beams and they have an atomic density of > 10 atoms/cm and improved collimation characteristics.
Abstract:
The development of optical and electric systems for the production and processing of signals is increasingly moving towards large bandwidth. Combining both systems requires the development of components for reliable and efficient conversion of optical signals into electric signals within extremely short time ranges at high repetition rates. Normally, short electrical pulses are produced using a laser and a separate semiconductor element. According to the invention, short laser pulses and electrical pulses are produced simultaneously by a component;a semiconductor layer (7) is disposed on a reflector (2) of the laser resonator, said layer having an intensity-dependent refraction index and an intensity-dependent electric resistor and the semiconductor material represents a divergent lens with respect to the laser radiation and a switch with respect to the electric current. The beam control in the resonator is adjusted in such a way that only parts of the radiation having large intensities are optimally fed back into the optimally pumped active medium (3). Two strip lines (9) are disposed on the semiconductor layer (7) in such a way that a gap (11) arises between both strip lines (9). The two strip lines (9) represent switch lines and the gap (11) represents the contact gap of an electric switch. One component can thus enable short stable laser pulses and short electric pulses to be produced which are exactly synchronized with said laser pulses.
Abstract:
The invention relates to novel nucleus export signal peptides, to fusion proteins containing the same, and to the use thereof. The inventive signal peptides modify the transport of biological structures between the nucleus and cytoplasm.