We present H - and K _ { s } -bands observations of the LkH \alpha 330 disk with a multi-band detection of the large gap and spiral-like structures .
The morphology of the outer disk ( r \sim 0 \farcs 3 ) at PA=0–45 ^ { \circ } and PA=180–290 ^ { \circ } are likely density wave-induced spirals and comparison between our observational results and simulations suggests a planet formation .
We have also investigated the azimuthal profiles at the ring and the outer-disk regions as well as radial profiles in the directions of the spiral-like structures and semi-major axis .
Azimuthal analysis shows a large variety in wavelength and implies that the disk has non-axisymmetric dust distributions .
The radial profiles in the major-axis direction ( PA= 271 ^ { \circ } ) suggest that the outer region ( r \geq 0 \farcs 25 ) may be influenced by shadows of the inner region of the disk .
The spiral-like directions ( PA=10 ^ { \circ } and 230 ^ { \circ } ) show different radial profiles , which suggests that the surfaces of the spiral-like structures are highly flared and/or have different dust properties .
Finally , a color-map of the disk shows a lack of an outer eastern region in the H -band disk , which may hint the presence of an inner object that casts a directional shadow onto the disk .