Abstract
By using an analytical model and a finite element method, we investigate a new, very sensitive, superconducting traveling wave photodetector made by an optical fiber, which includes a high index layer (LaAlO3) with small losses, a metallic (gold) layer, and two active superconducting layers (YBCO). While the fundamental guided degenerate mode HE11 is highly confined in the interior YBCO layer, the plasmon non-degenerate mode TM01 and plasmon degenerate mode HE12 are tightly confined in the exterior superconducting layer. In our structure of the fiber with five layers (without a buffer layer), the imaginary parts of the HE11, TM01, HE12 modes and the power absorption efficiency in superconducting layers are larger in comparison with that of a fundamental mode from a LaAlO3–YBCO–Au planar waveguide. The confinement regimes of the light and the power absorption efficiency in superconducting layers can be optimized by only acting on the fiber geometry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have