Nearfield phase change optical recording using a GaP hemispherical lens

Kusato Hirota, Tom D. Milster, Kei Shimura, Yan Zhang, Joshua S. Jo

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


The solid immersion lens (SIL) and modified liquid immersion lens (MLIL) using a GaP lens resolve the 400 nm pitch periodical structure are demonstrated. The edge response of the MLIL is 300 nm, which is approximately 1/3 as small as that of conventional objective lens. The amorphous marks, 200 nm in diameter, can be recorded and read by the MLIL and a red semiconductor laser.

Original languageEnglish (US)
Pages (from-to)361-363
Number of pages3
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 Joint International Symposium on Optical Memory and Optical Optical Data Storage (ISOM/ODS'99) - Koloa, HI, USA
Duration: Jul 12 1999Jul 15 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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