Photonic crystal based nano-displacement sensor

Abstract

Photonic crystal based nano -displacement sensor for horizontal as well as vertical displacement has been proposed. The design is highly sensitive in the displacement region 40nm–120nm with sensitivity 0.00461nm^-1 for horizontal displacement of the moving PhC waveguide. For vertical displacement of the moving PhC waveguide the design is highly sensitive in the region 150nm-200nm with sensitivity 0.00684nm^-1 for zero horizontal displacement, 130nm- 200nm with sensitivity 0.00523 nm^-1for 10nm horizontal displacement, 130nm-200nm with sensitivity 0.00418 nm^-1 for 20nm horizontal displacement, 130nm-200nm with sensitivity 0.00461 nm^-1for 30nm horizontal displacement,100nm-130nm with sensitivity 0.00466 nm-1for 40nm horizontal displacement. It has been concluded that the proposed design behaves as a Nano-displacement sensor for horizontal displacement of the moving PhC waveguide up to the region of displacement of magnitude of 400nm and for vertical displacement of the moving PhC waveguide up to the region of displacement of magnitude of 300nm.The proposed design can behave as a nano-Displacement sensor for both horizontal as well as vertical displacement.