Browsing by Author "SHEN, YR"

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OPTICAL 2ND-HARMONIC GENERATION FROM MAGNETIZED SURFACES
(1989-01-15)
PAN, RP
;
WEI, HD
;
SHEN, YR
;
電子物理學系
;
電子工程學系及電子研究所
THEORY OF DOUBLY RESONANT INFRARED-VISIBLE SUM-FREQUENCY AND DIFFERENCE-FREQUENCY-GENERATION FROM ADSORBED MOLECULES
(1994-05-01)
HUANG, JY
;
SHEN, YR
;
光電工程研究所
;
Institute of EO Enginerring
We theoretically analyze doubly resonant infrared-visible sum-frequency (DR IVSFG) and difference-frequency generation (DR IVDFG) from a monolayer of adsorbates at an interface. our calculated results with a model molecule indicate that the resonant amplitude of nonlinear optical susceptibility of DR IVDFG and DR IVSFG processes conveys information about the electron-vibration coupling in adsorbates. Moreover, owing to a dephasing-rephasing procedure involved, DR IVDFG can also be developed into a sensitive probe for investigating the coherent phase relaxation process in adsorbed molecules without the complication of inhomogeneous broadening.
WAVE MIXING IN ELECTRIC-FIELD BIASED NEMATIC THIN-FILMS
(1993)
CHEN, SH
;
CHEN, TJ
;
SHEN, YR
;
KUO, CL
;
交大名義發表
Wave mixing due to molecular reorientation in electric field biased nematic thin films is studied. By using the continuum theory, general formulae have been derived for the orientational angle distribution. The concept of a thin film grating is utilized to describe the diffraction efficiency. Experimental results which exhibit the behaviours of the transmission beam and diffraction beams have been obtained as predicted by the numerical calculation.