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A Silver-Coated Sinusoidal Sub-Wavelength Structure With Polarization Feature For Light Emitting Diode

Author

Listed:
  • CHENG-HAO KO

    (Graduate Institute of Automation and Control, National Taiwan University of Science and Technology, Taipei 106, Taiwan)

  • JIAN-SHIAN LIN

    (Department of Electro-Optical Engineering, Yuan Ze University, Chungli, Taoyuan 320, Taiwan)

  • CHANG-TAI CHEN

    (Department of Electrical Engineering, Yuan Ze University, Chungli, Taoyuan 320, Taiwan)

  • NIEN-PO CHEN

    (Department of Electro-Optical Engineering, Yuan Ze University, Chungli, Taoyuan 320, Taiwan)

Abstract

A two-dimensional sub-wavelength grating (SWG) is fabricated on light-emitting diodes (LEDs). The SWG is simulated by finite-difference time-domain (FDTD) method. The SWG surface has silver-coated dielectric materials with sinusoidal structures, 175 nm period and 125 m depth of groove. When the incident wave is in the red light region of 600–700nm, the transmission efficiency of TM propagated light will reach 0.82. If this SWG structure is applied in LCD direct backlight module, the lower polarization piece can be replaced and fluorescence efficiency of LED can be improved.

Suggested Citation

  • Cheng-Hao Ko & Jian-Shian Lin & Chang-Tai Chen & Nien-Po Chen, 2009. "A Silver-Coated Sinusoidal Sub-Wavelength Structure With Polarization Feature For Light Emitting Diode," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 16(04), pages 631-634.
    • Handle: RePEc:wsi:srlxxx:v:16:y:2009:i:04:n:s0218625x09012998
    DOI: 10.1142/S0218625X09012998
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