Tunable coherent vacuum ultraviolet and extreme ultraviolet radiation have been produced in H2 by three-photon resonant third harmonic generation via B1 Σ_(u)^(+)(v’) ← X^(1) Σ_(g)^(+) (v = 0 ) and C^(1) IIu(v’) ...Tunable coherent vacuum ultraviolet and extreme ultraviolet radiation have been produced in H2 by three-photon resonant third harmonic generation via B1 Σ_(u)^(+)(v’) ← X^(1) Σ_(g)^(+) (v = 0 ) and C^(1) IIu(v’) ← X^(1) Σ_(g)^(+) ( v = 0 ) transitions. Highly resolved third harmonic spectrum exhibits some distinct characteristics. Phase-matching effect of the nonlinear optical process is also discussed.展开更多
Tunalbe coherent extreme ultraviolet radiation has been produced in nitrogen by third harmonic generation(THG)processes enhanced by two-photon resonance with the a^(1)II_(g)(v'=1)state and three-photon resonance w...Tunalbe coherent extreme ultraviolet radiation has been produced in nitrogen by third harmonic generation(THG)processes enhanced by two-photon resonance with the a^(1)II_(g)(v'=1)state and three-photon resonance with the c'_(4)^(1)Σ_(u)^(+)(v'=1)state,respectively.The highly resolved THG spectra imply that THG can be used to probe the higher excited states and to detect the rotational population of a molecular gas.展开更多
Methane has been used as a nonlinear optical medium to produce tunable coherent vacuum ultraviolet and extreme ultraviolet radiation.A vibrational structure with a vibrational frequency of 820cm^(-1) was observed in a...Methane has been used as a nonlinear optical medium to produce tunable coherent vacuum ultraviolet and extreme ultraviolet radiation.A vibrational structure with a vibrational frequency of 820cm^(-1) was observed in a highly resolved third harmonic spectrum.This proved that third harmonic generation is an effective method to probe the higher excited states of molecular gases.展开更多
基金the National High Technology Program of Lasers(863-410).
文摘Tunable coherent vacuum ultraviolet and extreme ultraviolet radiation have been produced in H2 by three-photon resonant third harmonic generation via B1 Σ_(u)^(+)(v’) ← X^(1) Σ_(g)^(+) (v = 0 ) and C^(1) IIu(v’) ← X^(1) Σ_(g)^(+) ( v = 0 ) transitions. Highly resolved third harmonic spectrum exhibits some distinct characteristics. Phase-matching effect of the nonlinear optical process is also discussed.
基金Supported by the High Technology Program of Lasers(863-410)the National Natural Science Foundation of China under Grant No.19584001.
文摘Tunalbe coherent extreme ultraviolet radiation has been produced in nitrogen by third harmonic generation(THG)processes enhanced by two-photon resonance with the a^(1)II_(g)(v'=1)state and three-photon resonance with the c'_(4)^(1)Σ_(u)^(+)(v'=1)state,respectively.The highly resolved THG spectra imply that THG can be used to probe the higher excited states and to detect the rotational population of a molecular gas.
基金Supported by the High Technology Program of Lasers(863-410)the National Natural Science Foundation of China under Grant No.19584001.
文摘Methane has been used as a nonlinear optical medium to produce tunable coherent vacuum ultraviolet and extreme ultraviolet radiation.A vibrational structure with a vibrational frequency of 820cm^(-1) was observed in a highly resolved third harmonic spectrum.This proved that third harmonic generation is an effective method to probe the higher excited states of molecular gases.
