New technique for measuring small MOS gate currents

Garrigues, M.; Pavlin, Antoine

doi:10.1049/el:19850013

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…12 The fiber being used for the ILIAD interferometer is a "Panda" fiber that uses stress-induced birefringence and it connects a laser at room temperature to the experiment at 4 K. The fiber experiences large temperature changes and is also subjected to mechanical stress where it passes through vacuum flanges. A reduction in temperature causes the birefringence of the fiber to increase 13 which decreases the beat length. Cooling of the feedthroughs and any other parts in contact with the fiber may also indirectly stress the fiber and affect the birefringence due to differential thermal expansion between materials.…”

Section: Fiber Characterizationmentioning

confidence: 99%

“…Optical fibers remain flexible at low temperatures, 14 and for PM fibers, their birefringence increases as temperature decreases. 13 This may lead to an assumption that their use at cryogenic temperatures is straightforward. However, their ability to maintain polarization relies on accurate alignment of the input light with the fiber axes and how well this is maintained as the fiber is cooled.…”

Section: Observed Cryogenic Performance Of Standard Fiber Vacuummentioning

confidence: 99%

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A cryogenic optical feedthrough using polarization maintaining fibers

Nelson

Collins

Speake

2016

Review of Scientific Instruments

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Polarization maintaining optical fibers can be used to transmit linearly polarized light over long distances but their use in cryogenic environments has been limited by their sensitivity to temperature changes and associated mechanical stress. We investigate experimentally how thermal stresses affect the polarization maintaining fibers and model the observations with Jones matrices. We describe the design, construction, and testing of a feedthrough and fiber termination assembly that uses polarization maintaining fiber to transmit light from a 633 nm HeNe laser at room temperature to a homodyne polarization-based interferometer in a cryogenic vacuum. We report on the efficiency of the polarization maintaining properties of the feedthrough assembly. We also report that, at cryogenic temperatures, the interferometer can achieve a sensitivity of 8 × 10(-10) rad/√Hz at 0.05 Hz using this feedthrough.

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Section: Fiber Characterizationmentioning

confidence: 99%

Section: Observed Cryogenic Performance Of Standard Fiber Vacuummentioning

confidence: 99%

A cryogenic optical feedthrough using polarization maintaining fibers

Nelson

Collins

Speake

2016

Review of Scientific Instruments

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InP metal‐insulator‐semiconductor field‐effect transistors using vacuum‐evaporated films

Takagi¹,

Sugano²

1988

Electron Comm Jpn Pt II

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The characteristic of the interface between InP and an insulator was investigated using an MIS structure on an InP substrate fabricated by using vacuum‐evaporated SiO or ZnS for the gate insulator and vacuum‐evaporated aluminum for the gate electrode. An interface state density of 5 × 1011 cm−2 eV−1 was obtained from the C ‐ V characteristic of the MIS diode fabricated on an n‐type InP. Annealing at a temperature between 100 and 200°C was effective in decreasing the hysteresis and the interface state density. InP MIS FET transistors were fabricated using vacuum‐evaporated SiO and ZnS films for the gate insulator, resulting in an excellent dc FET characteristic. The effective mobilities were as high as 3100 cm−2/V.s and 1400 cm−2/V.s when SiO was used on semiinsulating and p‐type InP substrates, respectively. When ZnS was used on a semiinsulating substrate, the effective mobility was 1800 cm−2/V.s. The mobility of the device was influenced strongly by the activation temperature of the ion‐implanted substrate. When the activation temperature was increased from 660°C to 700°C, the mobility decreased. This mobility decrease is considered to be due to Coulomb scattering in the channel.

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Characteristics and the present status of SAW materials in Japanese industries

Shimizu

1993

Electron Comm Jpn Pt III

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Surface acoustic wave (SAW) devices have been used for filters, delay lines, resonators and oscillators. Since the characteristics of SAW devices are determined by the piezoelectric substrate, SAW devices must be selected for appropriate material. This paper examines first the characteristics of SAW propagating through several kinds of piezoelectric substrates. Next, using the reports from companies involved with SAW devices, the application and development of piezoelectric materials and the present status of SAW devices will be summarized. The future of SAW materials will also be described.

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New technique for measuring small MOS gate currents

Cited by 5 publications

References 3 publications

A cryogenic optical feedthrough using polarization maintaining fibers

A cryogenic optical feedthrough using polarization maintaining fibers

InP metal‐insulator‐semiconductor field‐effect transistors using vacuum‐evaporated films

Characteristics and the present status of SAW materials in Japanese industries

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