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10 September 2019 Bacteriorhodopsin suspensions breaks spatial symmetry of an optical vortex field (Conference Presentation)
Keigo Masuda, Taiki Yoshizawa, Tomoki Akiyama, Yoshiko Okada-Shudo, Takeshi Murata, Kohei Toyoda, Katsuhiko Miyamoto, Takashige Omatsu
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Proceedings Volume 11098, Molecular and Nano Machines II; 110980K (2019) https://doi.org/10.1117/12.2528668
Event: SPIE Organic Photonics + Electronics, 2019, San Diego, California, United States
Abstract
Optical vortex possesses an annular intensity profile and an optical orbital angular momentum arising from its helical wavefront. In particular, it is noteworthy that optical vortex can twist the irradiated materials, such as silicon, metal, and polymer, to form chiral structures. In this paper, we report on a spatial symmetry breaking of optical vortex propagating through bacteriorhodopsin (bR) suspensions. A 1 µm picosecond optical vortex mode propagated through bR suspensions (concentration: ~10 µM diluted in a 16 % NaCl solution) was broken into a twin mode with two bright spots. Also, the twin mode rotated towards a clockwise or counter-clockwise direction assigned by the handedness of the incident optical vortex mode. The rotation speed of the twin mode was measured to be 0.05 cycle/second. It was worth mentioning that such symmetry breaking of the optical vortex mode manifests an interaction between a helical wavefront and a helical bacteriorhodopsin. In fact, this phenomenon was never observed by using a NaCl solution without bacteriorhodopsin.
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Keigo Masuda, Taiki Yoshizawa, Tomoki Akiyama, Yoshiko Okada-Shudo, Takeshi Murata, Kohei Toyoda, Katsuhiko Miyamoto, and Takashige Omatsu "Bacteriorhodopsin suspensions breaks spatial symmetry of an optical vortex field (Conference Presentation)", Proc. SPIE 11098, Molecular and Nano Machines II, 110980K (10 September 2019); https://doi.org/10.1117/12.2528668
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KEYWORDS
Optical vortices
Wave propagation
Wavefronts
Metals
Picosecond phenomena
Polymers
Silicon
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