scholarly journals Zeeman quantum beats of helium Rydberg states excited by synchrotron radiation

2020 ◽  
Vol 27 (3) ◽  
pp. 675-680 ◽  
Author(s):  
Yasumasa Hikosaka ◽  
Hiroshi Iwayama ◽  
Tatsuo Kaneyasu
Keyword(s):  
Synchrotron Radiation ◽  
Ultraviolet Light ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Fluorescence Decay ◽  
Quantum Beat ◽  
Quantum Beats ◽  
Theoretical Formulation ◽  
Polarization Characteristics ◽  
Extreme Ultraviolet Light

Quantum beats in fluorescence decay from Zeeman-split magnetic sublevels have been measured for helium Rydberg states excited by synchrotron radiation. The Zeeman quantum beats observed in this prototypical case were fitted with an equation from a theoretical formulation. It is proposed that Zeeman quantum beat measurement can be a useful way to simply evaluate the polarization characteristics of extreme ultraviolet light.

scholarly journals Autoionization Dynamics of (2P1/2)ns/d States in Krypton Probed by Noncollinear Wave Mixing with Attosecond Extreme Ultraviolet and Few-Cycle Near Infrared Pulses

2019 ◽  
Author(s):  
Ashley Fidler ◽  
Hugo Marroux ◽  
Erika Warrick ◽  
Etienne Bloch ◽  
Wei Cao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Quantum Beat ◽  
Quantum Beats ◽  
Wave Mixing ◽  
State Dependent ◽  
Simultaneous Evaluation ◽  
Electronic Dynamics

The autoionization dynamics of the (<sup>2</sup>P<sub>1/2</sub>)ns/d Rydberg states in krypton are investigated using wave-mixing signals generated with subfemtosecond XUV pulses and noncollinear, few-cycle NIR pulses. Despite quantum beat oscillations from the XUV-induced coherence, these wave-mixing spectra allow for the simultaneous evaluation of autoionization lifetimes from a series of Rydberg states. Experimentally measured lifetimes for the wave-mixing signals emitting from the (<sup>2</sup>P<sub>1/2</sub>)6d/8s, 7d/9s, and 8d/10s resonances compare favorably with lifetimes for the (<sup>2</sup>P<sub>1/2</sub>)6d, 7d, and 8d Rydberg states determined from spectral linewidths. Analysis of the quantum beats reveals that the enhancement of wave-mixing pathways leads to reporter state-dependent decays in the wave-mixing signals. The results demonstrate the promise of wave-mixing spectroscopies with subfemtosecond XUV pulses to provide valuable insights into processes governed by electronic dynamics.<br>

scholarly journals Autoionization Dynamics of (2P1/2)ns/d States in Krypton Probed by Noncollinear Wave Mixing with Attosecond Extreme Ultraviolet and Few-Cycle Near Infrared Pulses

2019 ◽  
Author(s):  
Ashley Fidler ◽  
Hugo Marroux ◽  
Erika Warrick ◽  
Etienne Bloch ◽  
Wei Cao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Rydberg States ◽  
Quantum Beat ◽  
Quantum Beats ◽  
Wave Mixing ◽  
State Dependent ◽  
Simultaneous Evaluation ◽  
Electronic Dynamics

The autoionization dynamics of the (<sup>2</sup>P<sub>1/2</sub>)ns/d Rydberg states in krypton are investigated using wave-mixing signals generated with subfemtosecond XUV pulses and noncollinear, few-cycle NIR pulses. Despite quantum beat oscillations from the XUV-induced coherence, these wave-mixing spectra allow for the simultaneous evaluation of autoionization lifetimes from a series of Rydberg states. Experimentally measured lifetimes for the wave-mixing signals emitting from the (<sup>2</sup>P<sub>1/2</sub>)6d/8s, 7d/9s, and 8d/10s resonances compare favorably with lifetimes for the (<sup>2</sup>P<sub>1/2</sub>)6d, 7d, and 8d Rydberg states determined from spectral linewidths. Analysis of the quantum beats reveals that the enhancement of wave-mixing pathways leads to reporter state-dependent decays in the wave-mixing signals. The results demonstrate the promise of wave-mixing spectroscopies with subfemtosecond XUV pulses to provide valuable insights into processes governed by electronic dynamics.<br>

Tailoring extreme-ultraviolet light

2017 ◽  
Vol 11 (4) ◽  
pp. 209-210
Author(s):  
Taro Sekikawa ◽  
Kenichi L. Ishikawa
Keyword(s):  
Ultraviolet Light ◽  
Extreme Ultraviolet ◽  
Extreme Ultraviolet Light

Lasing of extreme ultraviolet light with nitrogen plasma in a recombining phase—Roles of doubly excited states

2012 ◽  
Vol 19 (6) ◽  
pp. 063302 ◽  
Author(s):  
Takuya Ozawa ◽  
Shuhei Yamamura ◽  
Nao Tatsumura ◽  
Kazuhiko Horioka ◽  
Tohru Kawamura
Keyword(s):  
Excited States ◽  
Ultraviolet Light ◽  
Extreme Ultraviolet ◽  
Nitrogen Plasma ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
Extreme Ultraviolet Light

Enhancing the conversion efficiency of extreme ultraviolet light sources using a 2 µm-wavelength laser

2021 ◽  
Author(s):  
Yun Yuan ◽  
Yan-Yun Ma ◽  
Wenpeng Wang ◽  
Shijia Chen ◽  
Ye Cui ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Emission Spectrum ◽  
Ultraviolet Light ◽  
Conversion Efficiency ◽  
Extreme Ultraviolet ◽  
Light Sources ◽  
Band Emission ◽  
Percentage Points ◽  
Hydrodynamic Code ◽  
Extreme Ultraviolet Light

Abstract In this study, we use the FLASH radiation hydrodynamic code and the FLYCHK atomic code to investigate the energy conversion and spectra associated with laser–Sn target interactions with 1 µm and 2 µm wavelength lasers. We found that the conversion efficiency (CE) reached as much as 3.38% with the 2 µm laser, which is 1.48 percentage points higher than the 1 µm laser (CE = 1.9%). In addition, we analyzed the contribution of dominant ionization states to the emission spectrum for both lasers. We observed that the growths of the out-of-band emission eventually led to a broadening of the spectrum, resulting in a reduction of SP for the 1 µm laser. By contrast, the emission main peaks were all centered near 13.5nm for the 2 µm laser, which is beneficial for efficient emission of light with a 13.5 nm wavelength (relevant for nanolithographic applications).

scholarly journals Observation of extreme ultraviolet light emission from an expanding plasma jet with multiply charged argon or xenon ions

2018 ◽  
Vol 113 (15) ◽  
pp. 153502 ◽  
Author(s):  
A. G. Shalashov ◽  
A. V. Vodopyanov ◽  
I. S. Abramov ◽  
A. V. Sidorov ◽  
E. D. Gospodchikov ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emission ◽  
Extreme Ultraviolet ◽  
Plasma Jet ◽  
Multiply Charged ◽  
Extreme Ultraviolet Light

scholarly journals Extreme ultraviolet light from a tin plasma driven by a 2-\si{\micro\meter}-wavelength laser

2020 ◽  
Author(s):  
Oscar Versolato ◽  
Lars Behnke ◽  
Ruben Schupp ◽  
Zoi Bouza ◽  
MUHARREM BAYRAKTAR ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Extreme Ultraviolet ◽  
Tin Plasma ◽  
Extreme Ultraviolet Light
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