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Figure 1

From: Efficient Single-Photon Coupling from a Nitrogen-Vacancy Center Embedded in a Diamond Nanowire Utilizing an Optical Nanofiber

Figure 1

Coupling system between an optical nanofiber and a diamond nanowire. (a) Schematic of the proposed coupling system. (b) Geometry of numerical simulations. r f is the radius of the nanofiber, r d and L d are the radius and the length of the diamond nanowire, respectively. n f = 1.46 and n d = 2.14 are the refractive indices of silica and diamond, respectively. (c–f) Electric field distributions of two principal supermodes for the case of the nanofiber radius r f = 240 nm and the nanowire radius r f = 85 nm. The black solid lines represent the surfaces of the nanofiber and the diamond nanowire. (g), (h) Effective indices as a function of the nanofiber radius r f for TM-like supermodes and TE-like supermodes, respectively. The nanowire radius r d = 85 nm is fixed. The black solid and short dashed lines represent the effective indices of the uncoupled nanofiber and diamond nanowire fundamental modes, respectively.

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