One and Two-photon Excited Optogalvanic Spectra of Argon in the Wavelength Region of 735 – 850 nm
One and Two-photon Excited Optogalvanic Spectra of Argon in the Wavelength Region of 735 – 850 nm
复制标题
735 – 850 nm 波长范围内氩的一光子和二光子激发光电光谱
作者：
Hideyuki Matsuta;K. Wagatsuma;K. Kitagawa
使用格林式辉光放电管研究了 735 至 850 nm 之间可见光至近红外光谱区域的氩光电 (OG) 光谱，该管已广泛用于获取各种薄膜样品上元素成分的深度剖面。用脉冲钛宝石激光观察到约 49 条单光子和双光子 OG 峰；这些峰被精确指定。无需将脉冲激光照射聚焦到超过 1 mJ，即可轻松观察到氩气的双光子 OG 光谱。观察到的氩OG光谱的激发机制可分为3种类型：单光子跃迁、双光子跃迁和双光子逐步跃迁。此外，伪谐振效应也被发现是有效的。本实验中观察到的氩线适合作为脉冲可调谐激光辐射的方便校准波长标记。
Optogalvanic (OG) spectra of argon in the visible to near-infrared spectral region between 735 and 850 nm were investigated using a Grimm-style glow-discharge tube, which has been widely used to obtain depth profiles of the elemental composition on various film-like samples. About 49 lines of one-photon and two-photon OG peaks were observed with a pulsed Ti:sapphire laser; these peaks were precisely assigned. Two-photon OG spectra of argon were easily observed without focusing the pulsed laser irradiation to more than 1 mJ. The excitation mechanisms of the observed argon OG spectra could be classified into 3 types: single-photon transition, two-photon transition, and two-photon stepwise transition. In addition, a pseudo-resonant effect was also found to be effective. The argon lines observed in this experiment are suitable as convenient calibration wavelength markers of pulsed tunable laser radiation.