Browsing by Author "Chen, MR"

Now showing 1 - 2 of 2

Diamond growth onCoSi(2)/Si by bias-enhanced microwave plasma chemical vapor deposition method
(2001-11-01)
Chen, MR
;
Chang, L
;
Chang, DF
;
Chen, HG
;
材料科學與工程學系
Diamond was grown on polycrystalline CoSi2/Si substrates by bias-enhanced microwave plasma chemical vapor deposition. Both of the positive and negative biasing effects were investigated by microstructural characterization. It has been found that nucleation density can reach similar to 10(9) cm(-2) with positive biasing, much higher than with negative biasing. Cross-sectional transmission electron microscopy shows that diamond deposited by positive biasing grows on a relatively smooth CoSi2 surface, while the etching effect of ion bombardment during negative biasing results in a rough CoSi2 surface. The diamond morphology obtained with negative bias has a flat surface with a strong (1 0 0) texture. (C) 2001 Elsevier Science B.V. All rights reserved.
Nonlinear dynamics of self-pulsating laser diodes under external drive
(1999-10-01)
Juang, C
;
Chen, MR
;
Juang, J
;
應用數學系
;
Department of Applied Mathematics
A self-pulsating laser diode under external drive shows the nonlinear dynamical effects of two competing frequencies. One can establish a route to chaos by increasing the modulation current. However, when the modulation frequency is varied, the chaotic state is suddenly destroyed at the harmonic frequencies of the self-pulsating frequency. This approach therefore offers a simple chaotic light source for possible optical chaotic communication. (C) 1999 Optical Society of America.