Charge storage and the effect of ultraviolet radiation on aluminium oxide films

Rageh, M.S.I.; Morgan, D. V.; Guile, A.E.

doi:10.1088/0022-3727/10/16/017

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…6) with time constants 78 and 650 seconds compared with 5 and 120 seconds reported in that work. The slower discharge time may arise because the native oxide layer on our aluminium trap was thicker or less conductive than that on the copper trap in [11] and could support a longer relaxation time for any charges on it [12].…”

Section: Charging Effectsmentioning

confidence: 98%

Heating rate and electrode charging measurements in a scalable, microfabricated, surface-electrode ion trap

et al. 2011

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We characterise the performance of a surfaceelectrode ion "chip" trap fabricated using established semiconductor integrated circuit and micro-electro-mechanicalsystem (MEMS) microfabrication processes, which are in principle scalable to much larger ion trap arrays, as proposed for implementing ion trap quantum information processing. We measure rf ion micromotion parallel and perpendicular to the plane of the trap electrodes, and find that on-package capacitors reduce this to 10 nm in amplitude. We also measure ion trapping lifetime, charging effects due to laser light incident on the trap electrodes, and the heating rate for a single trapped ion. The performance of this trap is found to be comparable with others of the same size scale.

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Section: Charging Effectsmentioning

confidence: 98%

Heating rate and electrode charging measurements in a scalable, microfabricated, surface-electrode ion trap

et al. 2011

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“…The initial traps are fabricated using aluminum metal, a common VLSI material with low resistivity. A thermal oxide forms at the Al surface which is known to charge upon UV irradiation [17]. If this were to degrade the trap performance, a W or Ti/W layer of the order of 60 µm thick could be deposited on top of the Al electrodes in order to improve the metal surface for ion trapping (tungsten has been used successfully for previous micron scale ion traps [18]); however, this was not attempted in the early experiments described here.…”

Section: Trap Design Fabrication and Packagingmentioning

confidence: 99%

Demonstration of a scalable, multiplexed ion trap for quantum information processing

Leibrandt¹,

Labaziewicz²,

Clark³

et al. 2009

QIC

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A scalable, multiplexed ion trap for quantum information processing is fabricated and tested. The trap design and fabrication process are optimized for scalability to small trap size and large numbers of interconnected traps, and for integration of control electronics and optics. Multiple traps with similar designs are tested with $^{111}$Cd$^+$, $^{25}$Mg$^+$, and $^{88}$Sr$^{+}$ ions at room temperature and with $^{88}$Sr$^+$ at 6 K, with respective ion lifetimes of 90 s, 300 $\pm$ 30 s, 56 $\pm$ 6 s, and 4.5 $\pm$ 1.1 hours. The motional heating rate for $^{25}$Mg$^{+}$ at room temperature and a trap frequency of 1.6 MHz is measured to be 7 $\pm$ 3 quanta per millisecond. For $^{88}$Sr$^{+}$ at 6 K and 540 kHz the heating rate is measured to be 220 $\pm$ 30 quanta per second.

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“…After 5-10 min of operation, during which the output level decreased considerably, a more stable regime was obtained. Although the measured input power also decreased with time, the decrease in output power was faster, probably due to changes in discharge properties [2] and to electrode effects [3]. Apparently, the discharge was perturbed by impurities.…”

mentioning

confidence: 99%

Spectral investigation of cw rf-pumped atomic Xe laser with a slab geometry

et al. 1996

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Abstract. A radiofrequency excited atomic Xe slab laserwith an active volume of 2 x 10 x 300 mm 3 using a quartz envelope containing the laser-gas mixture shows a stable cw performance with an output power of almost 1 W. The free-running system oscillates, depending on gas composition and density, on several lines between 1.73 and 3.51 lam. Line competition phenomena are observed. Single-line oscillation yields more than 500 mW. PACS: 42.55; 42.60; 52.90In our previous paper we presented experiments with a continuous wave (cw) radiofrequency (rf) excited atomic Xe laser in a slab geometry having aluminium electrodes. A laser output power of 1.5 W and an efficiency of up to 0.8% were reported [1]. The main problem with this system was that its operation lasted for a relatively short time at the high output level. The output power decreased rather strongly after about 1 min. After 5-10 min of operation, during which the output level decreased considerably, a more stable regime was obtained. Although the measured input power also decreased with time, the decrease in output power was faster, probably due to changes in discharge properties [2] and to electrode effects [3]. Apparently, the discharge was perturbed by impurities. In this article we report on our investigation of a cw Xe laser in a slab geometry with the rf electrodes mounted outside the laser-gas volume. In this configuration the laser gas is contained in a closed rectangular thin quartz or pyrex glass tube and the electrodes are located close to the outer wall of the tube.

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Charge storage and the effect of ultraviolet radiation on aluminium oxide films

Cited by 6 publications

References 9 publications

Heating rate and electrode charging measurements in a scalable, microfabricated, surface-electrode ion trap

Heating rate and electrode charging measurements in a scalable, microfabricated, surface-electrode ion trap

Demonstration of a scalable, multiplexed ion trap for quantum information processing

Spectral investigation of cw rf-pumped atomic Xe laser with a slab geometry

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