Nanowire Coupling to Photonic Crystal nanocavities for Single Photon Sources

Abstract

We demonstrate highly efficient evanescent coupling via a silica loop-nanowire, to ultra-small quantum-dot photonic-crystal cavities. It enables the tuning of both the Q-factor and the wavelength of the cavity mode independently.

Low power four wave mixing in an integrated, micro-ring resonator with Q = 12 million

“…However, a low intrinsic figure of merit (n2/(α2·λ), where α2 is the two-photon absorption coefficient) in silicon [8,9] as well as an immature fabrication process and possible material power handling issues in chalcogenides, have motivated the search for additional platforms. High Q cavities have been effective in enhancing FWM in silicon [10] and GaAs [11,12] integrated devices, as well as in silica [5,13] and chalcogenide glass [14][15][16] microspheres and toroids.…”

Characterizing photonic crystal waveguides with an expanded k-space evanescent coupling technique

“…The tapers used in this work were created by flame brushing and elongating a standard single mode (at 1550nm) fiber using the technique described in [20]. The loop was formed by introducing some slack into the taper and applying a twist to form the loop.…”

“…6(a). Figure 7(a) shows the intrinsic Q [20] obtained for the closed waveguide samples with respectively 80 and 160 holes removed. By using Eq.…”

Polarized vertical beaming of an engineered hexapole mode laser

“…In general, the photons coming out of such a wavelength-scale cavity are highly diverging due to the strong diffractive tendency [12], but the vertical emission and efficient collection of light are crucial for practical applications. While dipole-type modes exhibit vertical emission naturally [13,14], both the relatively-low Q factor and degeneracy of the dipole mode limit its quantum optical applicability. Furthermore, for the electrical pumping, Q factor of the dipole mode decreases greatly because the electric field maximum at the center of dipole mode is strongly disturbed due to the central dielectric post which is underneath the PhC slab for current injection [15,16].…”