摘要:
In a method for generating a terahertz electromagnetic wave by using coherent phonons in a quantum structure, high density of coherent phonons acting as a radiation source of the terahertz electromagnetic wave are obtained by exciting the inter-band transitions in a quantum structure under the condition that the energy difference between two inter-band transitions in the quantum structure is resonated with the energy of the coherent phonons, and the terahertz electromagnetic wave is generated by the oscillatory polarizations of the coherent phonons. High density of coherent phonons may be created through the elementary excitation generated by using instantaneous laser pulses. A quantum well structure is effective as the quantum structure, and a scattering process of coherent phonon may be suppressed by confining coherent LO phonons in a well layer. Under the condition that the difference of energies between the heavy-hole and light-hole exitons in a quantum well structure agrees with the energy of LO phonons and both the exitons are created simultaneously, high density of coherent phonons may be generated. With this method, a terahertz electromagnetic wave can be effectively and strongly emitted from the coherent phonons.
摘要:
A polishing method can safely detach and lift up a workpiece from a polishing surface without carrying out the operation of making the workpiece overhang the polishing surface. The polishing method includes carrying out processing of a surface to be polished of a workpiece by supplying a liquid to a polishing surface while pressing the surface to be polished of the workpiece held by a holding device against the polishing surface and moving the workpiece and the polishing surface relative to each other, attracting the workpiece after the processing to the holding device while supplying the liquid to the polishing surface at a decreased flow rate, thereby detaching the workpiece from the polishing surface, and lifting up the holding device together with the workpiece on confirmation of detachment of the workpiece from the polishing surface and attachment of the workpiece to the holding device.
摘要:
A reference-frequency-signal switching circuit includes an internal reference-frequency-signal oscillator for generating an internal reference-frequency signal, a reference-frequency-signal input terminal to which an external reference-frequency signal is input, a reference-frequency-signal output terminal, and a reference-frequency-signal output switching section. In the reference-frequency-signal output switching section, when the external reference-frequency signal is not input to the reference-frequency-signal input terminal, the internal reference-frequency-signal oscillator is set to an active state and the internal reference-frequency signal output from the internal reference-frequency-signal oscillator is sent to the reference-frequency-signal output terminal; and when the external reference-frequency signal is input to the reference-frequency-signal input terminal, the internal reference-frequency-signal oscillator is set to an inactive state and the external reference-frequency signal is sent to the reference-frequency-signal output terminal. The reference-frequency-signal output switching section is provided with a band-pass filter for extracting the proper external reference-frequency signal.
摘要:
Since centers of a second gear, a fourth gear and a sixth gear coincide with each other and are disposed rotatably round a circumference of the same long shaft, a compact configuration can be realized while using a gear train of five gears to obtain a reduction gear ratio of a high gear ratio. The configuration in which the three gears have the same rotational center shaft in the way described above in an actuator which incorporates a plurality of gears is advantageous in that the number of center shafts is reduced and that the number of supporting holes in a housing which support center shafts is reduced.
摘要:
To securely prevent from battery depletion and enable transfer data without troubling a user, a communication address data storage unit stores a communication address datum such as an IP address, a telephone number of the predetermined information management apparatus arranged outside an electric car. When an accessory switch of the electric car is in OFF state, it is judged by a charge state judge unit whether or not the battery is in charging. When it is judged by the charge state judge unit that the battery is in charging, a control unit controls a radio communication unit to execute at least one action of transmitting updatable data and receiving update data for updating the updatable data between the information management apparatus. As a result, the car-mounted information apparatus can communicate by radio with the information management apparatus outside the electric car while the battery is in charging.
摘要:
To securely prevent from battery depletion and enable transfer data without troubling a user, a communication address data storage unit stores a communication address datum such as an IP address, a telephone number of the predetermined information management apparatus arranged outside an electric car. When an accessory switch of the electric car is in OFF state, it is judged by a charge state judge unit whether or not the battery is in charging. When it is judged by the charge state judge unit that the battery is in charging, a control unit controls a radio communication unit to execute at least one action of transmitting updatable data and receiving update data for updating the updatable data between the information management apparatus. As a result, the car-mounted information apparatus can communicate by radio with the information management apparatus outside the electric car while the battery is in charging.
摘要:
Provided is a container 1 for inspection which stores and pours out contents therein, and the container is provided with a container main body 2 having a mouth portion 22 formed thereon, a cover portion 3 attached to the mouth portion 22 to seal the container main body 2, and an opening cap 4 attached to the cover portion 3. The cover portion 3 has a closing wall 34 for closing the mouth portion 22, and the opening cap 4 is provided with an pouring outlet 421, and a cutting portion 431 for cutting the closing wall 34. When the opening cap 4 is attached to the cover portion 3, the cutting section 431 cuts the closing wall 34 to enable pouring out the contents.Thus, in the provided container 1 for inspection, sealing properties of the container main body 2 are ensured by the cover portion 3, and the closing wall 34 of the cover portion 3 is cut by the opening cap 4 attached to the cover portion 3 without removing the cover portion 3, whereby the contents can be poured out.
摘要:
Provided is a container 1 for inspection which stores and pours out contents therein, and the container is provided with a container main body 2 having a mouth portion 22 formed thereon, a cover portion 3 attached to the mouth portion 22 to seal the container main body 2, and an opening cap 4 attached to the cover portion 3. The cover portion 3 has a closing wall 34 for closing the mouth portion 22, and the opening cap 4 is provided with an pouring outlet 421, and a cutting portion 431 for cutting the closing wall 34. When the opening cap 4 is attached to the cover portion 3, the cutting section 431 cuts the closing wall 34 to enable pouring out the contents.Thus, in the provided container 1 for inspection, sealing properties of the container main body 2 are ensured by the cover portion 3, and the closing wall 34 of the cover portion 3 is cut by the opening cap 4 attached to the cover portion 3 without removing the cover portion 3, whereby the contents can be poured out.
摘要:
The present invention relates to a light-waveform measuring device and its measuring method, a complex-refractive-index measuring device and its measuring method, and a computer-program recording medium having programs for the same stored therein. It is an object of the present invention to measure an electric field of an electromagnetic wave in a light region having wavelengths smaller than those of electromagnetic waves in a near-infrared region and output time-varying waveforms thereof. It is also an object of the present invention to enable easily obtaining a complex refractive index of a material, on the basis of the result of measurement of the electric-field waveform of light. The present invention comprises gate-pulse-light generating means, measurement-light generating means and light-detecting means for detecting measurement light, wherein both of gate pulse light and measurement light are coherent lights, the measurement light is coherent light having a wavelength smaller than those of a near-infrared region, the gate pulse light has a pulse width smaller than a period of the measurement light, the measurement light and the gate pulse light are directed to the light-detecting means to generate carriers therein, a physical quantity based on the carriers is measured, and an electric field of the measurement light is measured on the basis of the physical quantity.
摘要:
A polishing method is used for polishing a substrate such as a semiconductor wafer to a flat mirror finish. A method of polishing a substrate by a polishing apparatus includes a polishing table (100) having a polishing surface, a top ring (1) for holding a substrate and pressing the substrate against the polishing surface, and a vertically movable mechanism (24) for moving the top ring (1) in a vertical direction. The top ring (1) is moved to a first height before the substrate is pressed against the polishing surface, and then the top ring (1) is moved to a second height after the substrate is pressed against the polishing surface.