Jingyu Yu;Jiaming Qian;Jun Liu;Songlin Yang;Sorin Melinte;Kemao Qian;Chao Zuo;Ran Ye
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引用次数: 0
Abstract
Refractometers based on interferometric methods require sophisticated systems and stable environment. Non-interferometric refractometers can offer advantages in terms of reducing device costs and simplifying device configurations. In this Letter, we proposed a microsphere-integrated photonic crystal (PC) refractometer with a high spatial resolution. The refractometer forms magnified patterns of the PC substrate when immersed in liquid. By invoking the two-dimensional windowed Fourier transform to analyze the patterns, the refractive index of liquid can be determined. The validity of the proposed method is verified by measuring both standard uniform liquids and the dynamic process of oil-water merging, suggesting it is a simple and effective tool for measuring RI with spatially resolved micrometer-scale resolution.
期刊介绍:
IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.