[2Hp01-09] Low-dimensional Material/Nanostructure/Nanomaterial (LD/NS/NM)

[2Hp05] Non reciprocal optical response using carbon nanotubes coupled to a nanofiber – towards a nanotube-based optical isolator

*Masaru Irita¹, Takahiro Yamamoto^1,2, Yoshikazu Homma¹, Mark Sadgrove^1,2, Takeshi Tanaka³, Hiromichi Kataura³ (1. Research Institute for Science and Technology, Tokyo University of Science, 2. Faculty of Science, Tokyo University of Science, 3. Nanomaterials Research Institute, AIST)

A single-walled carbon nanotube (SWCNT) has the shape of rolled-up graphene and right- or left-handed structures depending on the way it is rolled-up. Circular dichroism (CD) spectra have been observed using SWCNT with a structure that is rolled-up in a particular way. On the other hand, the evanescent field of an optical nanofiber is known to be elliptically-polarized (EPL) with polarization direction locked to the propagation direction of light within the fiber. In previous work, optical isolators were realized using EPL and cold atoms with in states which exhibited large CD. We propose that a similar non-reciprocal optical effect could allow the creation of optical isolators at room temperature using SWCNTs of a given chirality coupled to the evanescent field of a nanofiber. In this study, we will explore the principle of such a device and proposals for improving its performance.