Another laser-induced resonant transition in the v=n-l-1=2 metastable cascade of antiprotonic $^{4}\mathrm{He}$ atoms has been found by using a double-resonance technique. This was done by setting the first laser to the already known 470.724-nm resonance [(n,l)=(37,34)\ensuremath{\rightarrow}(36,33)], while the (38,35)\ensuremath{\rightarrow}(37,34) transition was searched for with the second laser. The resonant transition was found at a wavelength of 529.622\ifmmode\pm\else\textpm\fi{}0.003 nm, showing excellent agreement with a recent prediction of Korobov.Another laser-induced resonant transition in the v=n-l-1=2 metastable cascade of antiprotonic $^{4}\mathrm{He}$ atoms has been found by using a double-resonance technique. This was done by setting the first laser to the already known 470.724-nm resonance [(n,l)=(37,34)\ensuremath{\rightarrow}(36,33)], while the (38,35)\ensuremath{\rightarrow}(37,34) transition was searched for with the second laser. The resonant transition was found at a wavelength of 529.622\ifmmode\pm\else\textpm\fi{}0.003 nm, showing excellent agreement with a recent prediction of Korobov.

Physical Review AJan 1, 199734 citations

Demonstration and frequency noise characterization of a 17 $μ$ m quantum cascade laserDemonstration and frequency noise characterization of a 17 $μ$m quantum cascade laser

Mathieu Manceau, Thomas E. Wall, Hadrien Philip +5 more

We evaluate the spectral performance of a novel continuous-wave room-temperature distributed feedback quantum cascade laser operating at the long wavelength of 17 $μ$ m. By demonstrating broadband laser absorption spectroscopy of the $ν$2 fundamental vibrational mode of N2O molecules, we have determined the spectral range and established the spectroscopic potential of this laser. We have characterized the frequency noise and measured the line width of this new device, uncovering a discrepancy with the current consensus on the theoretical modeling of quantum cascade lasers. Our results confirm the potential of such novel narrow-line-width sources for vibrational spectroscopy. Extending laser spectroscopy to longer wavelength is a fascinating prospect that paves the way for a wide range of opportunities from chemical detection, to frequency metrology as well as for exploring light-matter interaction with an extended variety of molecules, from ultra-cold diatomic species to increasingly complex molecular systems.We evaluate the spectral performance of a novel continuous-wave room-temperature distributed feedback quantum cascade laser operating at the long wavelength of 17 $μ$m. By demonstrating broadband laser absorption spectroscopy of the $ν$2 fundamental vibrational mode of N2O molecules, we have determined the spectral range and established the spectroscopic potential of this laser. We have characterized the frequency noise and measured the line width of this new device, uncovering a discrepancy with the current consensus on the theoretical modeling of quantum cascade lasers. Our results confirm the potential of such novel narrow-line-width sources for vibrational spectroscopy. Extending laser spectroscopy to longer wavelength is a fascinating prospect that paves the way for a wide range of opportunities from chemical detection, to frequency metrology as well as for exploring light-matter interaction with an extended variety of molecules, from ultra-cold diatomic species to increasingly complex molecular systems.

arXiv:2310.16460Oct 25, 20232 citations

Lasers for quantum: applications with requirements, and the future

Christopher S. Wood

High-Power Diode Laser TechnologyMar 12, 20240 citations

Quantum optics and lasers

S. G. Lipson, H. Lipson, David Stefan Tannhauser

Cambridge University Press eBooksJul 27, 19950 citations

Quantum Telecommunication Based on Atomic Cascade Transitions

T. Chanelière, Dzmitry Matsukevich, S. D. Jenkins +3 more

A quantum repeater at telecommunications wavelengths with long-lived atomic memory is proposed, and its critical elements are experimentally demonstrated using a cold atomic ensemble. Via atomic cascade emission, an entangled pair of 1.53 microm and 780 nm photons is generated. The former is ideal for long-distance quantum communication, and the latter is naturally suited for mapping to a long-lived atomic memory. Together with our previous demonstration of photonic-to-atomic qubit conversion, both of the essential elements for the proposed telecommunications quantum repeater have now been realized.A quantum repeater at telecommunications wavelengths with long-lived atomic memory is proposed, and its critical elements are experimentally demonstrated using a cold atomic ensemble. Via atomic cascade emission, an entangled pair of 1.53 microm and 780 nm photons is generated. The former is ideal for long-distance quantum communication, and the latter is naturally suited for mapping to a long-lived atomic memory. Together with our previous demonstration of photonic-to-atomic qubit conversion, both of the essential elements for the proposed telecommunications quantum repeater have now been realized.

arXiv:quant-ph/0601055Physical Review LettersMar 10, 2006180 citations

Another laser-induced resonant transition in the v=n-l-1=2 metastable cascade of antiprotonic

^{4}\mathrm{He}

atoms has been found by using a double-resonance technique. This was done by setting the first laser to the already known 470.724-nm resonance [(n,l)=(37,34)\ensuremath{\rightarrow}(36,33)], while the (38,35)\ensuremath{\rightarrow}(37,34) transition was searched for with the second laser. The resonant transition was found at a wavelength of 529.622\ifmmode\pm\else\textpm\fi{}0.003 nm, showing excellent agreement with a recent prediction of Korobov.

Demonstration and frequency noise characterization of a 17

μ

m quantum cascade laser

We evaluate the spectral performance of a novel continuous-wave room-temperature distributed feedback quantum cascade laser operating at the long wavelength of 17

μ

m. By demonstrating broadband laser absorption spectroscopy of the $ν$2 fundamental vibrational mode of N2O molecules, we have determined the spectral range and established the spectroscopic potential of this laser. We have characterized the frequency noise and measured the line width of this new device, uncovering a discrepancy with the current consensus on the theoretical modeling of quantum cascade lasers. Our results confirm the potential of such novel narrow-line-width sources for vibrational spectroscopy. Extending laser spectroscopy to longer wavelength is a fascinating prospect that paves the way for a wide range of opportunities from chemical detection, to frequency metrology as well as for exploring light-matter interaction with an extended variety of molecules, from ultra-cold diatomic species to increasingly complex molecular systems.