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Hannig S, Pelzer L, Scharnhorst N, Kramer J, Stepanova M, Xu ZT, Spethmann N, Leroux ID, Mehlstäubler TE, Schmidt PO. Towards a transportable aluminium ion quantum logic optical clock. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:053204. [PMID: 31153262 DOI: 10.1063/1.5090583] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/07/2019] [Indexed: 06/09/2023]
Abstract
With the advent of optical clocks featuring fractional frequency uncertainties on the order of 10-17 and below, new applications such as chronometric leveling with few-centimeter height resolution emerge. We are developing a transportable optical clock based on a single trapped aluminum ion, which is interrogated via quantum logic spectroscopy. We employ singly charged calcium as the logic ion for sympathetic cooling, state preparation, and readout. Here, we present a simple and compact physics and laser package for manipulation of 40Ca+. Important features are a segmented multilayer trap with separate loading and probing zones, a compact titanium vacuum chamber, a near-diffraction-limited imaging system with high numerical aperture based on a single biaspheric lens, and an all-in-fiber 40Ca+ repump laser system. We present preliminary estimates of the trap-induced frequency shifts on 27Al+, derived from measurements with a single calcium ion. The micromotion-induced second-order Doppler shift for 27Al+ has been determined to be δνEMMν=-0.4-0.3 +0.4×10-18 and the black-body radiation shift is δνBBR/ν = (-4.0 ± 0.4) × 10-18. Moreover, heating rates of 30 (7) quanta per second at trap frequencies of ωrad,Ca+ ≈ 2π × 2.5 MHz (ωax,Ca+ ≈ 2π × 1.5 MHz) in radial (axial) direction have been measured, enabling interrogation times of a few hundreds of milliseconds.
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Affiliation(s)
- S Hannig
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - L Pelzer
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - N Scharnhorst
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - J Kramer
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - M Stepanova
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - Z T Xu
- MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, People's Republic of China
| | - N Spethmann
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - I D Leroux
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - T E Mehlstäubler
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - P O Schmidt
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
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Yorozu M, Yanagida T, Nakajyo T, Okada Y, Endo A. Laser microprobe and resonant laser ablation for depth profile measurements of hydrogen isotope atoms contained in graphite. APPLIED OPTICS 2001; 40:2043-2046. [PMID: 18357208 DOI: 10.1364/ao.40.002043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We measured the depth profile of hydrogen atoms in graphite by laser microprobing combined with resonant laser ablation. Deuterium-implanted graphite was employed for the measurements. The sample was ablated by a tunable laser with a wavelength corresponding to the resonant wavelength of 1S-2S of deuterium with two-photon excitation. The ablated deuterium was ionized by a 2 + 1 resonant ionization process. The ions were analyzed by a time-of-flight mass spectrometer. The deuterium ions were detected clearly with the resonant ablation. The detection limit was estimated to be less than 10(16) atoms/cm(3) in our experiments. We determined the depth profile by considering the etching profile and the etching rate. The depth profile agreed well with Monte Carlo simulations to within a precision of 23 mum for the center position and 4-mum precision for distributions for three different implantation depths.
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Wang SL, Ledingham KWD, Singhal RP. Observation of the Hypermetallic Molecule K2CN by Laser Ablation Mass Spectrometry. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960560d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. L. Wang
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland
| | - K. W. D. Ledingham
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland
| | - R. P. Singhal
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland
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Perera IK, Lyon IC, Turner G, Van Lierde P. Continuous wave laser resonance ionization mass spectrometric analysis of strontium. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0168-1176(93)03941-e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wang L, Borthwick IS, Jennings R, McCombes PT, Ledingham KWD, Singhal RP, McLean CJ. Observations and analysis of resonant laser ablation of GaAs. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf00325480] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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