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Phase-shifted Fresnel zone lenses for photomixing generation of coherent THz wave
Anand Vijayakumar
Published in
2012
Volume: 51
   
Issue: 7 PART 1
Abstract
Novel optics configurations simplified by using phase-shifted Fresnel zone lenses (FZLs) are proposed for THz wave generation by mixing optical beams from integrated twin lasers on GaAs photomixers. The phase-shifted FZL superimposes and collinearly collimates the beams from the closely-aligned twin lasers, or superimposes and focuses them directly onto a photomixer, with a high efficiency. Phase-shifted binary and analog FZLs were designed and fabricated by electron beam writing. Good performances close to the theoretical prediction were obtained, and THz wave generation was successfully demonstrated.© 2012 The JPN Society of Applied Physics.
About the journal
JournalJapanese Journal of Applied Physics
ISSN00214922
Open AccessNo
Concepts (13)
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    ELECTRON BEAM WRITING
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    FRESNEL ZONES
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    Gaas
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    Optical beams
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    PHASE SHIFTED
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    PHOTOMIXERS
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    PHOTOMIXING
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    Theoretical prediction
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    THZ WAVES
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    TWIN LASER
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    Electron beams
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    Phase shift
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    Terahertz waves