Effects of photophoretic trapping under varying wavelengths of light

Essa Ababseh; Jason Childers; Xiaomin Jin

doi:10.1117/12.2649439

14 March 2023 Effects of photophoretic trapping under varying wavelengths of light

Essa Ababseh, Jason Childers, Xiaomin Jin

Proceedings Volume 12443, Advances in Display Technologies XIII; 124430D (2023) https://doi.org/10.1117/12.2649439
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Photophoretic Optical Trapping (POT) is a relatively new concept in the field of optics which has potential application in 3D display. The POT is realized by confining a particle within a very small location of the optical system, mostly around the focus. The particle, if captured by the beam, has the potential to print visible 3D images in free space. Our POT system is encapsulated by an acrylic enclosure, which also incorporates a biconvex lens as well as a laser module with an adjustable focus. Particles are released around the top of the lens’ focal point until the captured particle can be seen. First, by implementing varying sizes of biconvex lenses, we are able to measure the capture rates of different focal length ranging from 60 to 200mm and extract the maximum capture rates of the system. The capture rates give us an accurate representation of the system limitations which demonstrates if the particle can and cannot be captured efficiently. From our data, we found that the most efficient capture is produced between the focal length around 80 to 160mm for a 405nm laser source. The range of 60 to 200mm will be used to reevaluate the wavelength of 405nm as well as 532nm and 630nm against one another to determine which yields the highest efficiency or rate of captures. The wavelength-dependence study experimentally reveals the relationship between wavelengths of light source and trapping capability which is novel and important for future photophoretic optical trapping applications.

Conference Presentation

Citation Download Citation

Essa Ababseh, Jason Childers, and Xiaomin Jin "Effects of photophoretic trapping under varying wavelengths of light", Proc. SPIE 12443, Advances in Display Technologies XIII, 124430D (14 March 2023); https://doi.org/10.1117/12.2649439

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