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°ïÖúÎĵµÀïÓÐÕâôһ¶Î»°£º Notice that the wave vector k1 is assumed to be the same for all domains selected for the physics interface. This also means that the phase will satisfy the condition of being continuous everywhere. If the wave is assumed to bend or there are different materials in the domains, the phase approximation above is not good and it is better to select a User defined Type of phase specification. When specifying the phase expression ¦Õ1(r), it is important that it is continuous everywhere. ´óÒâ¾ÍÊDz¨Ê¸kÔÚ²»Í¬²ÄÁÏÖÐĬÈϱ£³Ö²»±ä£¬ËùÒÔÔÚÃèÊöÏàλʱÐèÒªÏñÀý³ÌÄÇÑù·Ö¶Îд¡£ ------------------------------------- ÎÒµÄÎÊÌâÊÇÓÃÕâ¸öÄ£¿éÄ£Äâ¸ß˹¹âÊø£¬ÒòΪƥÅä±ß½çÌõ¼þÉϵİüÂç·½³ÌÀïÒ²°üÀ¨ÁËk£¨ÒÔ¼°ÆäËûºÍÕÛÉäÂÊÏà¹ØµÄ²ÎÊý£©, ÄÇôÕâ¸ökÐèÒªÒ²·Ö¶ÎÂ𣿣¿ »¹ÓÐÓëÕÛÉäÂÊÏà¹ØµÄ±ÈÈçÈðÀû³¤¶Èx0=pi*w0^2/wlµÈ±äÁ¿Ò²ÐèÒª¸ÄдÂ𣿠»¹ÊÇ˵ֻҪдºÃÆ¥Åä±ß½çÉϵİüÂç·½³Ì£¨²»¹ÜºóÃæÊÇ·ñ»á½øÈ벻ͬÕÛÉäÂʲÄÁÏ£¬Ö»ÒªÕâ¸ö±ß½çÉ϶ԾÍÐУ©£¬ÉèÖúò¨Ê¸k¾Í¿ÉÒÔÁË£¿£¿£¿ ÐÂÊÖ£¬¸ÅÄîÒ²²»ÊǺܶ®£¬Çó½â¡£ ------------------------------- ¸ß˹¹âÊøµÄ°üÂç·½³ÌÈçÏ£º E0*w0/w(z)*exp(-(y^2+x^2)/w(z)^2)*exp(-i*(-eta(z)+k*(y^2+x^2)/(2*R(z)))) |
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