Patent ID: 9557223
Date: 2017-01-31
CPC Classifications: G01J,G02B,G02F

Claim:
1. A Mach-Zehnder interferometer, comprising: an input configured to receive an input electromagnetic (E-M) wave having a frequency on the order of one terahertz; a first arm extending from the input and configured to guide a spoofed surface plasmon polariton (SSPP) wave therethrough, where the SSPP wave propagates at a speed slower than the input E-M wave; a second arm extending from the input in parallel with the first arm and configured to guide a spoofed surface plasmon polariton (SSPP) wave, where the SSPP wave propagates at a speed slower than the input E-M wave and the refractive index of the first arm differs from the refractive index of the second arm; and an output configured to receive the SSPP waves from each of the first arm and the second arm and form an interference wave therein.