Development of an Ultrasensitive Ultrafast Phase Spectrometer

超灵敏超快相位光谱仪的研制

• 批准号: 0116564
• 负责人: Rick Trebino
• 金额: $ 70万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116564&HistoricalAwards=false
• 关键词: Development; Ultrasensitive; Ultrafast; Phase; Spectrometer

A grant has been awarded to Drs Trebino and El-Sayed at the Georgia Institute of Technol-ogy to develop a novel ultrasensitive ultrafast intensity-and-phase spectrometer, which yields the full intensity and phase vs. time (or frequency) of luminescence and other light pulses relevant to biology and many other fields. The spectrometer will have a very high sensitivity for single-shot measurements and a 1-photon-per-pulse sensitivity for multi-shot measurements. These sensitivi-ties are approximately six orders magnitude better than those of current measurement techniques.The proposed instrument involves combining a spectrometer with a coherent reference light pulse. Specifically, it will use an ultra-short pulse with a spectrum ranging from 400 nm to 1600 nm and generated by propagating readily available, low-energy, 100-fs pulses through microstruc-ture optical fiber (recently developed by Lucent Technologies. Demonstrations of the new instru-ment will involve simple photochemical systems relevant to photobiology. Examples include dou-ble proton transfer processes in 7-azaindole and its analogues (important in understanding radiation-induced DNA mutation) and the photo-isomeri-zation around double bonds, e.g., in the merocyanine dyes (important for understanding of the primary processes in proteins of vision, such as rhodopsin and bacteriorhodopsin photosynthesis). Later, we propose to use this device to further understand the complex primary dynamics in bacteriorhodopsin and to distinguish between different theoretical models proposed for its primary photo-dynamics.This instrument will also have applications far beyond biology. For example, semi-conductor experiments often generate weak light pulses of new wavelengths, which cannot be measured with conventional methods, but potentially can with this. Also, astronomers routinely measure the intensity vs. frequency (the spectrum) of light from astrophysical sources, but they cannot currently measure the spectral phase. With this instrument it should be possible to do so and yield information previously unavailable regarding extraterrestrial light sources. In addition, the spectrometer will allow measurements of the phase of signal and idler beams in a broadband optical parametric generators-a system that is interesting because the phase of these two beams is quan-tum-mechanically entangled with many degrees of freedom and so can be used for quantum com-puting. Finally, the ultrafast intensity and phase vs. time of virtually any light-emitting medium could be studied using this highly sensitive instrument.

已向Trebino博士授予了一笔赠款，并在佐治亚州技术学院授予了EL，以开发一种新型的超敏感性超快强度和相位光谱仪，从而产生了发光的全强度和相位（或频率）（或频率），以及与生物学和许多其他领域相关的脉冲。光谱仪将对单发测量值具有很高的灵敏度，对于多弹射测量值，光谱仪将具有1次脉冲敏感性​​。 这些敏感性比当前测量技术的灵敏度大约要好大约六个级级。该仪器涉及将光谱仪与连贯的参考光脉冲组合在一起。 具体而言，它将使用一个超短脉冲，光谱范围从400 nm到1600 nm不等，并通过通过微观质量光纤传播容易获得的，低能量的100-FS脉冲来生成，该脉冲光纤（最近由Lucent Technologies开发）（新工具的演示涉及简单的光学系统中的protobiology in Photobiology in Photobiology intble Photobiology to photobiology in tun photobiology intble photobiology in photobiology intble photobiology in。 7-氮杂及其类似物（对于理解辐射诱导的DNA突变）和围绕双键的光化度重新化，例如，在梅胶糖染料中（对于理解视觉蛋白质的主要过程，重要的是，诸如视opsopsin和bacteriorhopopsin operior shipsocts soptim soptim soppriphists soppriphists soptim tosects complity tosects of tosection soppriphists complity tossick soppripts complity tossick soptim soppripts tosects，区分针对其主要光学的不同理论模型。该仪器还具有远远超出生物学的应用，半导体实验通常会产生新波长的弱光脉冲，这是无法用常规方法来测量的，但潜在的可能性。 同样，天文学家通常会测量天体物理来源的强度与频率（光谱），但目前无法测量光谱阶段。 借助此仪器，应该可以这样做，并产生以前关于外星光源的信息。 此外，光谱仪将允许在宽带光学参数发生器-A系统中测量信号和惰轮的相位，这很有趣，因为这两个光束的相位是机械机械的，并具有许多自由度的机械纠缠，因此可以用于量子使用。 最后，使用这种高度敏感的仪器可以研究几乎所有发光介质的超快速强度和相位与时间。