Photon-sparse microscopy: visible light imaging using infrared illumination
Photon-sparse microscopy: visible light imaging using infrared illumination
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光子稀疏显微术：利用红外照明的可见光成像
DOI：
10.1364/optica.2.001049
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发表时间：
2015-12-20
期刊：
影响因子：
10.4
通讯作者：
Padgett, Miles J.
中科院分区：
文献类型：
--
作者：
Aspden, Reuben S.;Gemmell, Nathan R.;Padgett, Miles J.
传统的成像系统依赖于由物体散射或透射并随后成像的照明光。基于参量下转换的鬼成像系统使用位置相关的信号光子和闲频光子的双光束。一个光束照亮物体，而图像信息是从从未与物体相互作用的第二光束恢复的。在这封信中，我们报告了一个基于相机的鬼成像系统，其中相关的光子有显着不同的波长。波长为1550 nm的红外光子照射物体，并由InGaAs/InP单光子雪崩二极管检测。使用高效、低噪声、光子计数照相机，从在460 nm波长处一致检测到的位置相关的可见光子记录图像数据。从红外照明到可见光检测波长的图像信息的有效传输以及对单个光子计数的能力允许在以仅100 pJ cm（-2）s（-1）的光功率密度照明对象的同时获取图像。这种波长变换鬼影成像技术具有潜在的成像的光敏标本或隐蔽操作是理想的。(C)2015美国光学学会
Conventional imaging systems rely upon illumination light that is scattered or transmitted by the object and subsequently imaged. Ghost-imaging systems based on parametric down-conversion use twin beams of position-correlated signal and idler photons. One beam illuminates an object while the image information is recovered from a second beam that has never interacted with the object. In this Letter, we report on a camera-based ghost imaging system where the correlated photons have significantly different wavelengths. Infrared photons at 1550 nm wavelength illuminate the object and are detected by an InGaAs/InP single-photon avalanche diode. The image data are recorded from the coincidently detected, position-correlated, visible photons at a wavelength of 460 nm using a highly efficient, low-noise, photon-counting camera. The efficient transfer of the image information from infrared illumination to visible detection wavelengths and the ability to count single photons allows the acquisition of an image while illuminating the object with an optical power density of only 100 pJ cm(-2) s(-1). This wavelength-transforming ghost-imaging technique has potential for the imaging of light-sensitive specimens or where covert operation is desired. (C) 2015 Optical Society of America