title: Wheatstone bridge configuration for evaluation of plasmonic energy transfer.
abstract: We propose an internal (on-chip) Wheatstone bridge configuration to evaluate the efficiency of near-field transducers (NFT) as used in heat-assisted magnetic recording (HAMR). The electric field enhancement between the transducer and the image plane is monitored by measuring the resistance of metal electrodes composing the image plane. The absorption of the enhanced electric field causes an increase in the metal temperature, and thereby, in its resistance whose variation is monitored with an internal Wheatstone bridge which is accurately balanced in the absence of the electric field.
authors.affiliation: Tyndall National Institute, University College Cork, Lee Maltings, Prospect Row, Cork, Ireland.
authors.forename: J
authors.initials: J
authors.lastname: Gosciniak
authors.affiliation: Seagate Technology, 1 Disc Drive, Springtown Industrial Estate, Londonderry, Northern Ireland, BT48 OBF.
authors.forename: M
authors.initials: M
authors.lastname: Mooney
authors.affiliation: Seagate Technology, 1 Disc Drive, Springtown Industrial Estate, Londonderry, Northern Ireland, BT48 OBF.
authors.forename: M
authors.initials: M
authors.lastname: Gubbins
authors.affiliation: Tyndall National Institute, University College Cork, Lee Maltings, Prospect Row, Cork, Ireland.
authors.forename: B
authors.initials: B
authors.lastname: Corbett