Near field optical head and reproduction method

A near-field optical head for reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the near-field optical head comprising:

• a slider having at least one hole formed through in an inverted cone form such that a summit thereof is rendered as a microscopic aperture;
• a microscopic electrode formed on a side surface of the inverted cone formed hole;
• a light detecting element arranged in the slider on an opposite surface to a surface formed with the microscopic aperture in a manner corresponding to the microscopic aperture;
• the microscopic aperture and the recording medium being brought into proximity;
• and
• a voltage being applied to between the electrode and the microscopic electrode.

A near-field optical head for reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the near-field optical head comprising:

• a slider having at least one hole formed through in an inverted cone form such that a summit thereof is rendered as a microscopic aperture;
• an optical waveguide formed on a side surface of the inverted cone formed hole;
• a tip sharpened electrode formed inside of the inverted cone formed hole and having a tip directed to the microscopic aperture;
• a light detecting element arranged in the slider on an opposite surface to a surface formed with the microscopic aperture in a manner corresponding to the optical waveguide;
• the microscopic aperture and the recording medium being brought into proximity;
• and
• a voltage being applied to between the electrode and the tip sharpened electrode.

A near-field optical head for reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the near-field optical head comprising:

• a slider having at least one protrusion formed in an inverted cone form such that a summit thereof is opposed to the recording medium;
• a microscopic electrode formed on a side surface of the protrusion such that a microscopic aperture is formed at a tip;
• a light detecting element arranged in the slider on an opposite surface to a surface formed with the protrusion in a manner corresponding to the protrusion;
• the protrusion and the recording medium being brought into proximity;
• and
• a voltage being applied to between the electrode and the microscopic electrode.

A near-field optical head reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the near-field optical head comprising:

• a slider having at least one protrusion formed in an inverted cone form such that a summit thereof is opposed to the recording medium;
• a microscopic electrode formed at a tip of the inverted cone form;
• a light detecting element arranged in the slider on an opposite surface to a surface formed with the protrusion in a manner corresponding to the protrusion;
• the protrusion and the recording medium being brought into proximity;
• and
• a voltage being applied to between the electrode and the microscopic electrode.

A reproducing method for reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the reproducing method comprising:

• using a near-field optical head having
• a slider opposed to the electrode and formed with at least one tip sharpened head electrode, and
• a light detecting element arranged in the slider in a manner corresponding to the head electrode;
• bringing the protrusion and the recording medium into proximity;
• applying a voltage to between the electrode and the head electrode to cause the recording medium to emit light;
• and
• detecting a light due to light emission by the light detecting element.

A reproducing method for reproducing information on a recording medium that is formed on an electrode and emits light by applying an electric field, the reproducing method comprising:

• using a near-field optical head having
• a slider formed with at least one microscopic aperture and having a head electrode opposed to the electrode and provided in the vicinity of the microscopic aperture, and
• a light detecting element arranged in the slider on a opposite surface to a surface formed with the microscopic aperture in a manner corresponding to the microscopic aperture;
• bringing the protrusion and the recording medium into proximity;
• applying a voltage to between the electrode and the head electrode to cause the recording medium to emit light;
• and
• detecting a light due to light emission by the light detecting element through the microscopic aperture.