Near-field phase-change optical recording over 1.2 numerical aperture

1999 ◽  
Author(s):  
Koichiro Kishima ◽  
Yuji Kuroda ◽  
Kimihiro Saito ◽  
Kiyoshi Osato ◽  
Kenji Yamamoto ◽  
...  
Keyword(s):  
Phase Change ◽  
Near Field ◽  
Numerical Aperture ◽  
Optical Recording ◽  
Field Phase

Near-Field Phase-Change Optical Recording of 1.36 Numerical Aperture

2000 ◽  
Vol 39 (Part 1, No. 2B) ◽  
pp. 962-967 ◽  
Author(s):  
Isao Ichimura ◽  
Koichiro Kishima ◽  
Kiyoshi Osato ◽  
Kenji Yamamoto ◽  
Yuji Kuroda ◽  
...  
Keyword(s):  
Phase Change ◽  
Near Field ◽  
Numerical Aperture ◽  
Optical Recording ◽  
Field Phase

Near-Field Phase Change Optical Recording Using a GaP Hemispherical Lens

2000 ◽  
Vol 39 (Part 1, No. 2B) ◽  
pp. 968-972 ◽  
Author(s):  
Kusato Hirota ◽  
Tom D. Milster ◽  
Kei Shimura ◽  
Yan Zhang ◽  
Joshua S. Jo
Keyword(s):  
Phase Change ◽  
Near Field ◽  
Optical Recording ◽  
Field Phase

Multi Layer Disk Design For Near Field Phase-Change Recording

2003 ◽  
Vol 803 ◽  
Author(s):  
Koichiro Kishima ◽  
Isao Ichimura ◽  
Kimihiro Saito ◽  
Kenji Yamamoto ◽  
Atsushi Iida ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Layer Structure ◽  
Near Field ◽  
Numerical Aperture ◽  
High Refractive Index ◽  
Field Phase ◽  
Optical Setup ◽  
Field Recording ◽  
Signal Characteristics

ABSTRACTWe propose multi-layer near-field recording with using inner focus mode. The restricted conditions for multi-layer near-field recording are discussed from the viewpoint of both media structure and optical setup. One solution is presented for dual layer recording with a numerical aperture (NA) of 1.5 and a wavelength of 405 nm as a light source of GaN laser diode.In the proposed layer structure, a Nb2O5 material has been adopted as the intermediate layer because of its high refractive index, n = 2.4, in order to prevent the decrease of beam propagation that corresponds to NA>1. Almost the same signal characteristics can be obtained from both recording layers at the air gap of 40 nm. The adjustment of focusing position and the compensation of spherical aberrations have been implemented by the combination of an expander lens unit and a liquid crystal (LC) panel in the optical setup.

Near-field phase-change recording using a GaN laser diode

2000 ◽  
Author(s):  
Koichiro Kishima ◽  
Isao Ichimura ◽  
Kenji Yamamoto ◽  
Kiyoshi Osato ◽  
Yuji Kuroda ◽  
...  
Keyword(s):  
Phase Change ◽  
Laser Diode ◽  
Near Field ◽  
Field Phase

Near-field optical recording with nanocomposite cover-layer for numerical aperture of 1.85

2012 ◽  
Vol 59 (11) ◽  
pp. 943-946 ◽  
Author(s):  
Jin-Hong Kim ◽  
Seong-Hun Lee ◽  
Jeong-Kyo Seo
Keyword(s):  
Near Field ◽  
Numerical Aperture ◽  
Optical Recording ◽  
Cover Layer

Near-Field Optical Recording on a Pre-Grooved Phase-Change Disk in the Blue-Violet

2001 ◽  
Vol 40 (Part 1, No. 3B) ◽  
pp. 1821-1826 ◽  
Author(s):  
Isao Ichimura ◽  
Koichiro Kishima ◽  
Kimihiro Saito ◽  
Kenji Yamamoto ◽  
Yuji Kuroda ◽  
...  
Keyword(s):  
Phase Change ◽  
Near Field ◽  
Optical Recording

Near-field phase-change recording using a GaN laser diode

2002 ◽  
Author(s):  
K. Kishima ◽  
I. Tchimura ◽  
K. Yamamoto ◽  
K. Osato ◽  
Y. Kuroda ◽  
...  
Keyword(s):  
Phase Change ◽  
Laser Diode ◽  
Near Field ◽  
Field Phase

Three-Dimensional Thermal Modelling and Analysis of Near-Field Phase Change Optical Disks

2000 ◽  
Vol 39 (Part 1, No. 2B) ◽  
pp. 952-956 ◽  
Author(s):  
Jia Jun Ho ◽  
Jek Chong Lee ◽  
Tow Chong Chong ◽  
Luping Shi
Keyword(s):  
Phase Change ◽  
Near Field ◽  
Three Dimensional ◽  
Thermal Modelling ◽  
Field Phase ◽  
Optical Disks
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