Purdue Research Foundation

Gururaj Naik

Vladimir M Shalaev

Alexandra Boltasseva

Alexander V Kildishev

Timothy David Sands

Urcan Guler

Bivas Saha

Donald Stocks

A titanium nitride-based metamaterial, and method for producing the same, is disclosed, consisting of ultrathin, smooth, and alternating layers of a plasmonic titanium nitride (TiN) material and a dielectric material, grown on a substrate to form a superlattice. The dielectric material is made of AScN, where 'x' ranges in value from 0.2 to 0.4. The layers of alternating material have sharp interfaces, and each layer can range from 1-20 nanometers in thickness. Metamaterials based on titanium TiN, a novel plasmonic building block, have many applications including, but not 'limited to emission enhancers, computer security, etc. The use of nitrogen vacancy centers in diamond, and light emitting diode (LED) efficiency enhancement is of particular interest.

Titanium nitride based metamaterial

An apparatus and method for heat-assisted magnetic recording (HAMR) employing a near-field transducer (NFT) made of plasmonic ceramic materials or intermetallics are disclosed. The NFT is made of a plasmonic material as well as a protective outer layer, which provides for longer usefulness and improved performance of the NFT and recording device. The plasmonic materials used include but are not limited to TiN, ZrN, HfN, TaN, VN, TiSi, TiAlN, TiZrN, ZnO, SnO, InO, RuO, LuO, WO, and MgB. Such materials, in combination with a protective layer, provide higher resistances and greater performance at temperatures required for HAMR, ranging from 300 up to 500 degrees Celsius.

Near field transducer for heat-assisted magnetic recording

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West Lafayette, IN, United States of America

Gururaj Naik