Slider, integrated slider, and hybrid storage device

A slider for writing information in and reading information from a magnetic storage layer, comprising a metal film,

• an opening being formed on a surface of the metal film,
• a plurality of axes crossing each other substantially perpendicularly at the opening, a first periodic groove, a second periodic groove, a third periodic groove, and a fourth periodic groove being provided for respective axes, and each of the first, second, third, and fourth periodic grooves including a plurality of grooves substantially perpendicular to the axis for which each periodic groove is provided,
• a distance between adjacent grooves of the plurality of grooves being a distance that allows surface plasmon to be excited when light is incident to the metal film,
• the first, second, third, and fourth periodic grooves being positioned point-symmetrically with respect to the opening,
• the second periodic groove being positioned counterclockwise by substantially 90 degrees from the first periodic groove around the opening,
• the third periodic groove being positioned counterclockwise by substantially 90 degrees from the second periodic groove around the opening,
• the fourth periodic groove being positioned counterclockwise by substantially 90 degrees from the third periodic groove around the opening, and
• relations L1=L3, L2=L4, L1−L2=λsp/4 being met, where L1 indicates a distance between the opening and a groove in the first periodic groove that is closest to the opening, L2 indicates a distance between the opening and a groove in the second periodic groove that is closest to the opening, L3 indicates a distance between the opening and a groove in the third periodic groove that is closest to the opening, L4 indicates a distance between the opening and a groove in the fourth periodic groove that is closest to the opening, and λsp indicates a wavelength of the surface plasmon.