Zobrazeno 1 - 10
of 49
pro vyhledávání: '"G. Hugh Song"'
Autor:
G. Hugh Song
Publikováno v:
Journal of the Korean Physical Society. 76:357-367
We give a fresh look into the age-old rotational kinematic formula which was originally devised by L. Euler in the eighteenth century. Instead of some verbose explanations for its logical validity, an argument of a covariant differentiation with resp
Autor:
G. Hugh Song, Chan M. Lim
Publikováno v:
Optics Communications. 283:1553-1557
Highly-directive light-emitting diodes showing high extraction efficiency are designed and demonstrated based on a two-dimensional super-periodic photonic-crystal structure. With this specific design, a super-periodic photonic-crystal structure can g
Publikováno v:
Journal of the Optical Society of Korea. 6:87-95
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 behavio
Autor:
G. Hugh Song
Publikováno v:
Journal of the Optical Society of America. A, Optics, image science, and vision. 31(2)
Based on complex-variable analysis of a Fabry–Perot resonator as a multimode nonsymmetric two-port waveguide device, two versions of equivalent-circuit configurations are presented: Starting from a renewed study on single-mode two-pole circuits, we
Publikováno v:
Journal of the Korean Physical Society. 56:262-264
Terahertz (THz) radiation measurements from p-doped InAs (carrier density: ∼ 7 × 10 cm−3) surfaces were carried out encompassing both IR (770–830 nm) and UV (360–385 nm) excitations by employing two synchronized femtosecond lasers. Each lase
Publikováno v:
Journal of Applied Physics. 79:2755-2761
We present results from numerical simulations of AlGaN/InGaN double‐heterostructure light‐emitting diodes. A highly convergent, fast, and memory efficient algorithm necessary for wide band‐gap device simulation was developed and is described he
Publikováno v:
Optics express. 15(10)
Germano-silicate glass fiber containing gold nanoparticles was developed by modified chemical vapor deposition and solution doping processes. Pumping with 488 nm Argon ion laser, we firstly report on the visible to infrared photoluminescence of the g
Publikováno v:
European Transactions on Telecommunications. 1:375-381
A versatile two-dimensional simulator for various types of semiconductor lasers for both steady state and transients has been developed. The simulator is capable of spectral analysis of quantum-well semiconductor lasers, such as gain-spectrum analysi
Publikováno v:
SPIE Proceedings.
Lasing dynamics of photonic-crystal single-cell cavity is studied by Lorentz-dispersive Gain FDTD method. From hexapole mode of a photonic-crystal single-cell cavity, the generation of laser modes and the relaxation oscillation are observed.
Publikováno v:
SPIE Proceedings.
We design a 1 X 4 optical splitter made of photonic crystal waveguides and analyze the properties of the optical splitter using the finite-difference time-domain method. Our simulation results show that the transmission properties vary with bend geom