Demonstration of Quantum Polarized Microscopy Using an Entangled-Photon Source

Demonstration of Quantum Polarized Microscopy Using an Entangled-Photon Source

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With the advancement of non-classical light sources such as single-photon and entangled-photon sources, innovative microscopy based on quantum principles has been proposed for traditional microscopy.This paper introduces the experimental demonstration of a quantum polarization microscopic technique that incorporates a quantum-entangled photon source.Although the point that employs the variation in polarization angle due to reflection or transmission at the sample is similar to classical polarization microscopy, the method for constructing the image contrast is significantly different.The image contrast is constructed by the coincidence count of signal and idler photons.

In the case that the coincidence count is recorded from both the signal and idler photons, the photon statistics resemble a thermal state, similar to the blackbody radiation, but with a significantly higher peak intensity in the second-order autocorrelation function at zero delay that is derived from the coincidence count, while, when the coincidence count is taken from either armada tantrum skis the signal or idler photon only, although pantaloni bianchi neonato the photon state exhibits a thermal state again, the photon statistics become more dispersive and result in a lower peak intensity of the autocorrelation function.These different thermal states can be switched by slightly changing the photon polarization, which is suddenly aroused within a narrow range of the analyzer angle.The autocorrelation function g2(0) at the thermal state exhibits a sensitivity that is three times higher compared to the classical coincidence count rate, and this concept can be effectively utilized to enhance the contrast of the image.One of the key achievements of our proposed method is ensuring a low power of illumination (in the order of Pico-joules) for constructing the image.

In addition, the robustness without any precise setup is also favorable for practical use.This polarization microscopic technique can provide a superior imaging technique compared to the classical method, opening a new frontier for research in material sciences, biology, and other fields requiring high-resolution imaging.