Phase delay and group velocity determination at a planar defect state in three dimensional photonic crystals
نویسندگان
چکیده
منابع مشابه
Phase delay and group velocity determination at a planar defect state in three dimensional photonic crystals
Phase sensitive optical transmission measurements have been performed on three dimensional opal-based photonic crystals containing a planar defect. From numerical derivation of the measured phase, the group velocity has been retrieved. Strong modulations in the group velocity are seen to correlate with a recovery in the transmission inside the forbidden spectral interval, demonstrating the pres...
متن کاملPhase Properties of One-Dimensional Quaternary Photonic Crystals
In this paper, properties of reflection phase in one-dimensional quaternary photonic crystals combining dispersive meta-materials and positive index materials are investigated by transfer matrix method. Two omnidirectional band gaps are located in the band structure of considered structure. However, we limit our studies to the frequency range of the second wide band gap. We observe that the val...
متن کاملThree-Dimensional Photonic Crystals
Principle Investigators: Georg von Freymann and Martin Wegener CFN-Financed Scientists: C. Becker (3/4 BAT IIa, 4 months), Markus Deubel (3/4 BAT IIa, 9 months), Martin Hermatschweiler (3/4 BAT IIa, 14.5 months), Nina Meinzer (3/4 BAT IIa, 1 month), Daniel Meisel (3/4 BAT IIa, 5.5 months), Michael S. Rill (3/4 BAT IIa, 32 months), Isabelle Staude (3/4 BAT IIa, 14 months) On average, this corres...
متن کاملA novel three-dimensional photonic laser and fabrication of three-dimensional photonic crystals
We have proposed a novel three-dimensional (3D) photonic crystal laser. The electromagnetic field, radiation power density, and lifetime of spontaneous emission of the laser were calculated by a plane-wave method. When a defect layer is introduced into the crystal, spontaneous emission radiates only in the lasing direction. The radiation angle is as sharp as that of a conventional surface-emitt...
متن کاملSelf-alignment of liquid crystals in three-dimensional photonic crystals.
We report on the observation of self-alignment of nematic liquid crystals into colloidal photonic crystals, over distances much larger than the typical size of the voids between the spheres. We observe that the infiltrated structure possesses a unique optical axis that is determined by an intrinsic structural anisotropy of photonic crystal opals. We develop a simple model to describe this self-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2007
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.2710772