Experimental characterization of short-wavelength Ni-like soft-x-ray lasing toward the water window

Daido, Hiroyuki; Sebban, S.; Sakaya, Noriyuki; Tohyama, Y.; Norimatsu, T.; Mima, Kunioki; Kato, Yoshiaki; Wang, S.; Yuan, Gu; Huang, Guan‐Long; Tang, Huajing; Murai, Kensuke; Butzbach, R.; Uschmann, I.; Vollbrecht, M.; Förster, E.

doi:10.1364/josab.16.002295

Cited by 18 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A change of ~1% is observed in the d of plasma for 30 ps, but it has no significant effect on the plasma parameters. The reliability of the results presented follows from a comparison with experimental data [40][41][42][43][44] where XRLs in Ni-like ions were studied using solid-state targets with Z = 47-65. In [43], it was shown that ions with Z < 55 are overionized to the Co-like stage; as shown in figure 3(a) in the experiment in [43], overionization for ions with Z > 55 was small.…”

Section: Discussionmentioning

confidence: 87%

Proposal for precision wavelength measurement of the Ni-like gadolinium x-ray laser formed during the interaction of a nanostructured target with an ultrashort laser beam

Ivanova

2015

Laser Phys. Lett.

View full text Add to dashboard Cite

The wavelengths of the 3d 9 4d [J = 0]-3d 9 4p [J = 1] transitions of x-ray lasers in Ni-like sequence ions with nucleus charges Z ⩽ 79 are refined. The results of calculations are within the experimental error. It was found that the wavelengths of 34+ and Gd 36+ , respectively, are in the range of 6.70-6.75 nm. Exactly for this narrow range, multilayer mirrors with high reflectance are developed. The gain of the x-ray laser with λ = 6.748 nm in Gd 36+ is calculated under the assumption that plasma is formed during the interaction of a nanostructured (cluster-like) gadolinium target with high-intensity pump laser radiation. The optimum plasma density, temperature, length, and pump parameters are determined to achieve the highest Gd 36+ ion fraction and emission quantum yield of ~10 13 photons.

show abstract

Section: Discussionmentioning

confidence: 87%

Proposal for precision wavelength measurement of the Ni-like gadolinium x-ray laser formed during the interaction of a nanostructured target with an ultrashort laser beam

Ivanova

2015

Laser Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…The gain coefficients of the Ni-like Yb and Hf lasing lines were g = 6.6 cm -1 and 3.6 cm -1 with the gain length product of gL = 11 and 6, respectively. 51 Indication of lasing in W at 4.3 nm, in the water window, was also observed. According to 1-D hydrodynamic simulation for 1-µm laser irradiation, the electrons are heated to ~ 1 kV, but the electron density of the heated region of ~ 10 21 cm -3 is lower than the required density.…”

Section: Extension Of Lasing Close To the Water Windowmentioning

confidence: 82%

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

Kato

Daido

2021

International Conference on X-Ray Lasers 2020

View full text Add to dashboard Cite

This paper presents a brief review of the x-ray laser development at the Institute of Laser Engineering, Osaka University, implemented with worldwide collaboration. The scaling of the x-ray lasing toward shorter wavelengths has been investigated in the recombination-pumped (RP) and electron-collisional-excitation (CE) pumped x-ray lasers. Extension of the RP x-ray laser close to the water window is described. With the CE x-ray laser, intense lasing of the J = 0-1 line at 19.6 nm in the neon-like Ge ion and lasing over 14.3 -4.5 nm with the nickel-like ions are reported. Spectroscopic studies of the x-ray lasers are described, including the first observation of polarization of the x-ray laser beam generated by amplified spontaneous emission. The perspective of the plasma-based x-ray lasers is also presented.

show abstract

“…6(a) It has been reported that such a level of fluctuation does not induce a critical degradation of the band-gap effect in the wafer-bonding-based 3D photonic crystals [24,25], whereas it might significantly influence inverted opal structures [26,27]. …”

Section: Analysis Of Fabrication Tolerancementioning

confidence: 99%

Three-dimensional photonic crystals fabricated by simultaneous multidirectional etching

et al. 2015

View full text Add to dashboard Cite

We discuss three-dimensional (3D) photonic crystals fabricated by simultaneous multidirectional plasma etching. First, we investigate a method for controlling the ion sheath used in reactive ion etching for obtaining multidirectional etching. We then discuss the fabrication tolerance from an analytical perspective. Based on our results, we demonstrate the fabrication of 3D photonic crystals with thicknesses of 1, 1.5, and 2 lattice periods in the surface-normal direction on single-crystalline silicon wafers, which show high reflectance (∼100%) and low transmittance (−17 dB) at optical communication wavelengths, suggesting the formation of a complete photonic band gap. We reveal that the shape of the etched holes limits the performance of 3D photonic crystals and suggest possible ways to improve the band-gap effect. Moreover, we show that 3D photonic crystals with short lattice constants show high reflectance (∼80%) at visible to near-infrared wavelengths. By investigating the influence of absorption on the characteristics of 3D photonic crystals, we reveal that the reflectance remains as high as 94% in the photonic band-gap range even when the absorption of silicon is taken into account. We find that a unique increase of absorption occurs at several discrete wavelengths below the photonic band gap, suggesting the possibility of manipulating light absorption. These results not only simplify the fabrication of 3D photonic crystals, but also provide a basis for realizing 3D photonic nanostructures that include other materials.

show abstract

Experimental characterization of short-wavelength Ni-like soft-x-ray lasing toward the water window

Cited by 18 publications

References 18 publications

Proposal for precision wavelength measurement of the Ni-like gadolinium x-ray laser formed during the interaction of a nanostructured target with an ultrashort laser beam

Proposal for precision wavelength measurement of the Ni-like gadolinium x-ray laser formed during the interaction of a nanostructured target with an ultrashort laser beam

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

Three-dimensional photonic crystals fabricated by simultaneous multidirectional etching

Contact Info

Product

Resources

About