#### Efficient beaming of self-collimated light from photonic crystals = 광결정에서 자기조준된 빛의 효율적 방출

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dc.contributor.authorPark, Jong-Moon-
dc.contributor.author박종문-
dc.date.accessioned2011-12-14T07:28:18Z-
dc.date.available2011-12-14T07:28:18Z-
dc.date.issued2009-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=309045&flag=dissertation-
dc.identifier.urihttp://hdl.handle.net/10203/47624-
dc.description학위논문(박사) - 한국과학기술원 : 물리학과, 2009.2, [ xvii, 79 p. ]-
dc.description.abstractIn this thesis, we have studied highly efficient beaming of self-collimated light from two-dimensional photonic crystals. From the calculations using the plane wave expansion and the finite-difference time-domain methods, we obtain the emission properties such as the spatial distributions of the electric fields and the transmission coefficients of power as a function of the distance of beam propagation as well as the angular distributions of power transmitted. We show that both enhanced transmission and highly directional emission of self-collimated beams from photonic crystals are achieved by using the bending and splitting of self-collimated beams in photonic crystals, and also by introducing an antireflection coating-like photonic crystal collimator to the exit surface of the structure. We also have investigated the device sensitivity to the transverse alignment error and the tilt error of the ARC-like PC collimator. We consider two-dimensional square lattice photonic crystals consisting of dielectric rods in air and restrict our consideration to the case of the TE modes (the electric field parallel to the rod axis). The dielectric constant and the radius of rods in PC 1 and 2 are $\epsilon = 12.0$ and $\it{r} = 0.35 a$, respectively. Here $\it{a}$ is the lattice constant of PC 1 and 2. The frequencies of self-collimated light beams which propagate along the $\Gamma \textrm{M}$ direction, around $\it{f} = 0.194 \it{c/a}$ are obtained from the equifrequency contours in the first band of PC 1 and 2. To improve the power transmission via the optimal minimization of the impedance mismatch between the photonic crystals and air, we have introduced the antireflection coating structures composed of the smaller surface rods which are of the radius $r_s = 0.2054 \it{a}$ and of the distance $d_s = 0.748 \it{a}$ at the end surfaces of the photonic crystals. We have carried out three kinds of studies for achieving highly efficient beaming of self-collimated light...eng
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectPhotonic crystals-
dc.subjectIntegrated optics devices-
dc.subjectPhotonic integrated circuits-
dc.subjectSelf-collimation phenomena-
dc.subjectBeaming effects-
dc.subject광결정-
dc.subject집적 광소자-
dc.subject광 집적회로-
dc.subject자기조준 현상-
dc.subject빔 효과-
dc.titleEfficient beaming of self-collimated light from photonic crystals = 광결정에서 자기조준된 빛의 효율적 방출-
dc.typeThesis(Ph.D)-
dc.identifier.CNRN309045/325007 -
dc.description.department한국과학기술원 : 물리학과, -
dc.identifier.uid020055069-
dc.contributor.localauthorPark, Jong-Moon-
dc.contributor.localauthor박종문-
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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