• 제목/요약/키워드: Photonic

검색결과 953건 처리시간 0.029초

포토닉 밴드갭 구조를 이용한 두껍고 큰 유전상수 패치 안테나의 성능 향상 (Improvement of Performance of Thick High Dielectric Patch Antennas Using Photonic Bandgap Structures)

  • 기철식;박익모;이정일;임한조
    • 한국전자파학회:학술대회논문집
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    • 한국전자파학회 2001년도 종합학술발표회 논문집 Vol.11 No.1
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    • pp.91-95
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    • 2001
  • This paper presents that photonic bandgap structures suppressing the propagation of surface waves can improve the performance of the patch antennas on thick high dielectric constant substrate. The forbidden propagation of surface wave due to the photonic bandgap enhances the radiation efficiency and reduce the back radiation drastically with maintaining the small size and wide bandwidth of the antennas.

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2차원 단일 셀 삼각형 광결정 공진기에서의 비축퇴된 홀극 모드에 관한 연구 (Nondegenerate Monopole Mode of Single Cell Two-dimensional Triangular Photonic Band Gap Cavity)

  • 허준;황정기;이용희
    • 한국광학회:학술대회논문집
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    • 한국광학회 2001년도 제12회 정기총회 및 01년도 동계학술발표회
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    • pp.16-17
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    • 2001
  • 광결정(photonic crystal)은 서로 다른 유전체가 규칙적으로 배열되어 있는 구조로서, 빛이 진행할 수 없는 진동수 영역인 광밴드갭(photonic bandgap)이 존재한다. 광밴드갭 특성으로 빛의 자발 방출과 진행 방향이 조절될 수 있기 때문에, 광결정은 나노 레이저, 광도파관, LED(Light Emitting Diode) 등의 광소자 개발에 응용되고 있다. 지금까지 2차원, 3차원의 광결정에 대한 많은 연구가 수행되어 왔으며, 현재에는 2차원의 슬랩(slab) 구조에 대해 활발하게 연구되고 있다. (중략)

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PMOLED Driver ASIC Supporting Multi-Line Addressing

  • Vogel, Uwe;Konig, Peter;Bunk, Gerd;Barth, Siegfried;Wahl, Jurgen
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1240-1242
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    • 2009
  • This paper describes a new 160x80 passive-matrix OLED driver ASIC capable in applying multi-line addressing (MLA). Application is directed towards highly-reliable displays, e.g. in automobiles.

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Enhanced photoluminescence of a hybrid luminescent film infiltrated into a colloidal photonic crystal

  • Yoo, Hyoung-Sun;Jeon, Duk-Young
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.204-206
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    • 2009
  • Luminescent films were prepared by infiltration of tris(dibenzoylmethane) mono(1, 10-phenanthroline) europium incorporated ormosil into colloidal $SiO_2$ photonic crystal templates. The PL intensity of the infiltrated film into the template was about 13 times higher than that of the plane film prepared without the template.

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Polarized OLED on a flexible optical anisotropic substrate for mobile display

  • Park, Byoung-Choo;Park, Chan-Hyuk;Kim, Mi-Na;Han, Mi-Young
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1523-1526
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    • 2009
  • We present highly polarized light emissions from an OLED on a flexible photonic anisotropic substrate. It was found that the polarization direction of emitted electroluminescent light corresponded to the ordinaryaxis of the photonic anisotropic substrate. Furthermore, it was also found that luminous polarized electroluminescence over 4,500 cd/$m^2$ was produced with high peak efficiency of 6 cd/A and high polarization ratio over 25.

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Effect of PEO of PS-P2VP photonic gel films

  • Shin, Sung-Eui;Kim, Su-Young;Shin, Dong-Myung
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1405-1407
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    • 2009
  • We prepared polystyrene-b-poly(2-vinyl pyridine) (PSb-P2VP) lamellar films which is hydrophobic block-hydrophilic polyelectrolyte block polymer have 57 kg/mol-b-57 kg/mol. The result of UV-visible absorption spectra supported that effect of poly(ethylene oxide) on the band gap tuning of PS-P2VP photonic gel like salt effect.

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Fiber Optic Engine for Full Color Mobile Display

  • Arabi, H.;An, S.;Oh, K.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.400-401
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    • 2009
  • In this paper we report a micro projector including of RGB sources, a $3{\times}1$ Fiber Optic Color Synthesizer (FOCS), and a two dimensional micro mechanical scanning mirror. We further report a modifier micro collimator which can enhance the resolution of the screened image.

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Chiral liquid crystals in photonic device applications

  • Gleeson, Helen F.;Yoon, Hyung-Guen;Roberts, Nicholas W.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.105-108
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    • 2007
  • Chiral liquid crystals exhibit band-gap structures responsive to electrical and optical fields, providing wide-ranging opportunities for photonics applications. We discuss three aspects of this technology: optics of chiral nematic devices and removal of pitch jumps; optical switching of chiral nematic materials; and using novel phases in photonic devices.

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FDTD Simulation of Photonic-Crystal Lasers and Their Relaxation Oscillation

  • Song, G. Hugh;Kim, Soan;Hwang, Kyung-Hwan
    • Journal of the Optical Society of Korea
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    • 제6권3호
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    • pp.87-95
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    • 2002
  • We have developed an finite-difference time-domain program that can analyze photonic devices with gain and/or dispersion. As an example, a two-dimensional photonic-crystal laser is simulated. The simulation can show the relaxation oscillation behavior at extremely high current injection.