| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to ;QZ}$8D 6Q
do Fourier transform and the far-field spectrum is recorded 4I&e_b< 30
by a CCD camera positioned in its focal plane. bp"@vlv
First, we summarize our results of on-axis excitation of a W`auQO
single 2D gap soliton in Fig. 1. Different from previous qk Hdr2
experimental observations in which either the probe beam abAX)R'
was launched off-axis to match the edge of the first BZ [6] NmbA~i
or its input phase or spectrum was engineered [11], we 0_\@!#-sml
demonstrate on-axis excitation of a 2D gap soliton without {DfXn1Cg0U
a priori phase or spectral engineering. In fact, we show /O@TqH
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