We demonstrate the applicability of 2-photon Rydberg excitations of nitric oxide (NO) at room temperature in a gas mixture with helium (He) as an optogalvanic gas sensor. The charges created initially from succeeding collisions of excited NO Rydberg molecules with free electrons are measured as a current on metallic electrodes inside a glass cell and amplified using a custom-designed highbandwidth transimpedance amplifier attached to the cell. We fnd that this gas sensing method is capable of detecting NO concentrations lower than 10 ppm even at atmospheric pressures, currently only limited by the way we prepare the gas dilutions.

中文翻译：

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基于里德堡激发的 NO 光电流气体传感器概念验证

我们证明了室温下在氦气 (He) 气体混合物中一氧化氮 (NO) 的 2 光子里德堡激发作为光电气体传感器的适用性。最初由激发的 NO 里德堡分子与自由电子的连续碰撞产生的电荷被测量为玻璃电池内金属电极上的电流，并使用连接到电池的定制设计的高带宽跨阻放大器放大。我们发现这种气体传感方法即使在大气压下也能够检测低于 10 ppm 的 NO 浓度，目前仅受我们制备气体稀释液的方式的限制。