NDLI: Optical Response and Fabrication of <formula formulatype=inline> <tex Notation=TeX>${rm MgB}

Content Provider	IEEE Xplore Digital Library
Author	Shibata, H. Asahi, M. Maruyama, T. Akazaki, T. Takesue, H. Honjo, T. Tokura, Y.
Copyright Year	2002
Abstract	We report the fabrication of MgB₂ nanowire based on a liftoff-like technique and its optical response. A Si/C bilayer mask is formed as the negative pattern of the nanowire by e-beam lithography and the standard liftoff process. A 10 nm-thick MgB₂ thin film is deposited on the pattern, which produces MgB₂ nanowire with a width of down to 200 nm. We do not need to liftoff the Si/C bilayer because the MgB₂ is well separated at the edge of the Si/C bilayer due to its overhang structure. The optical response at 1.5 mum wavelength is measured at 4.2 K. For a 300 nm-wide nanowire, photoresponse signals with the repetition rate of 100 MHz are observed, and all signals disappear as the laser intensity decreases below 1.8 times 10₄ photon/pulse. On the other hand, the signals become intermittent as the laser intensity decreases for a 200 nm-wide nanowire. The signal disappears below 4times 10² photon/pulse. This shows that the nanowire works in the multi-photon detection regime.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	358
Ending Page	360
Page Count	3
File Size	438061
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical device fabrication Optical films Detectors High temperature superconductors Resists Superconducting materials Delay Superconducting films Phonons Etching thin films Lift-off process magnesium diboride superconducting nanowire detectors
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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