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1. (WO2013163302) CHARACTERIZATION OF NEAR FIELD TRANSDUCERS

Pub. No.:    WO/2013/163302    International Application No.:    PCT/US2013/038005
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Thu Apr 25 01:59:59 CEST 2013
IPC: G11B 5/60
Applicants: SEAGATE TECHNOLOGY LLC
PENG, Chubing
ZHOU, Lifu
Inventors: PENG, Chubing
ZHOU, Lifu
Title: CHARACTERIZATION OF NEAR FIELD TRANSDUCERS
Abstract:
An approach for characterizing an optical near field transducer (NFT) involves providing excitation radiation to the NFT. The NFT emits photolummescent radiation in response to the excitation radiation. The output radiation from the NFT is filtered so that a portion of the photolummescent radiation emitted by the NFT passes through the filter and the excitation radiation is substantially blocked. A detector detects the portion of photolummescent radiation and outputs an electrical signal in response to detection of the portion of photolummescent radiation.