\u8bf7\u95ee\u8001\u5e08\uff0c\u5982\u4f55\u5728FDTD\u4e2d\u8bbe\u7f6e\u5165\u5c04\u5149\u7684\u5149\u5b50\u8f68\u9053\u89d2\u52a8\u91cfOAM? \u76ee\u524d\uff0c\u6211\u9700\u8981\u6a21\u62df\u8ba1\u7b97\u4e0d\u540cOAM \u6a21\u5f0f\u7684\u5149\u5165\u5c04\u5230\u6211\u7684\u8d85\u6750\u6599\u8868\u9762\uff0c\u6240\u4ea7\u751f\u7684\u7684\u5149\u5b66\u6548\u679c\u3002\u5149\u7684\u504f\u632f\u6001\u53ef\u4ee5\u5728\u5149\u6e90\u7684\u8bbe\u7f6e\u4e2d\u8fdb\u884c\u8bbe\u7f6e\uff0c\u4f46\u662f\u5149\u5b50\u7684\u8f68\u9053\u89d2\u52a8\u91cf\u4e00\u76f4\u627e\u4e0d\u5230\u53ef\u4ee5\u8bbe\u7f6e\u7684\u5730\u65b9\u3002<\/p>\n
\u6211\u5728\u8bba\u575b\u91cc\u627e\u5230\u4e00\u7bc7\u7c7b\u4f3c\u7684\u6587\u7ae0\uff0c\u662f\u7528\u7f16\u7a0b\u8bed\u8a00\u5bf9\u5165\u5c04\u5149\u6e90\u7684\u4e00\u4e9b\u53c2\u6570\u8fdb\u884c\u8bbe\u7f6e\uff0c\u5982\u4e0b\u6240\u793a\u3002\u7531\u4e8e\u6211\u5bf9\u7f16\u7a0b\u8bed\u8a00\u4e0d\u662f\u5f88\u719f\u6089\uff0c\u4e0d\u77e5\u9053\u5b59\u8001\u5e08\u80fd\u5426\u4fee\u6539\/\u7f16\u5199\u811a\u672c\u7a0b\u5e8f\uff0c\u6765\u8bbe\u7f6e\u5177\u6709\u4e0d\u540cOAM\u6a21\u5f0f\u7684\u5165\u5c04\u5149\u5462\uff1f\u8c22\u8c22<\/p>\n
<\/p>\n
# scriptfile:usr_custom_source.lsf<\/p>\n
# define position vectors<\/p>\n
x=linspace(-10e-6,10e-6,401);
y=linspace(-10e-6,10e-6,401);
z=0; #this is z z-normal source<\/p>\n
X=meshgridx(x,y);
Y=meshgridx(x,y);<\/p>\n
lambda0=0.5e-6;
f=c\/lambda0;
w=2*pi*f;
k=2*pi\/lambda0;<\/p>\n
#calculate k-space field profiles
NA=0.2;<\/p>\n
kx=linspace(-k,k,200);
ky=linspace(-k,k,200);
Kx=meshgridx(kx,ky);
Ky=meshgridy(kx,ky);
phi=atan2(Ky,Kx);
theta=real(acos(sqrt(1-Kx^2\/k^2-Ky^2\/k^2)));
envelope=exp(-0.5*(Kx^2+Ky^2)\/(NA*k)^2);<\/p>\n
Exk=cos(phi)*cos(theta)*envelope;<\/p>\n
Eyk=sin(phi)*cos(theta)*envelope;<\/p>\n
Ezk=sin(theta)*envelope;<\/p>\n
Ex=-1i*czt(Exk,kx,ky,x,y);<\/p>\n
Ey=-1i*czt(Eyk,kx,ky,x,y);<\/p>\n
Ez=-1i*czt(Ezk,kx,ky,x,y);<\/p>\n
Hxk=-sqrt(eps0\/mu0)*sin(phi)*envelope;
Hyk=sqrt(eps0\/mu0)*cos(phi)*envelope;
Hx=-1i*czt(Hxk,kx,ky,x,y);
Hy=-1i*czt(Hyk,kx,ky,x,y);
Hz=0*Ex;<\/p>\n
# sacle fild so E^2=1<\/p>\n
E2=abs(Ex)^2+abs(Ey)^2+abs(Ez)^2;
scaleFactor=sqrt(max(E2));
Ex=Ex\/scaleFactor;
Ey=Ey\/scaleFactor;
Ez=Ez\/scaleFactor;
Hx=Hx\/scaleFactor;
Hy=Hy\/scaleFactor;
Hz=Hz\/scaleFactor;<\/p>\n
# package field data into the EM fields dataset<\/p>\n
EM=rectilineardataset(“EM fields”,x,y,z);
EM.addparameter(“lambda”,c\/f,”f”,f);
EM.addattribute(“E”,Ex,Ey,Ez);
EM.addattribute(“H”,Hx,Hy,Hz);<\/p>\n
# save dataset to .mat file
matlabsave(“import_data.mat”,EM);<\/p>\n","protected":false},"template":"","class_list":["post-235764","topic","type-topic","status-closed","hentry","topic-tag-LumericalFDTD-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.220.96.180"],"_bbp_subscription":["263442","2592"],"_btv_view_count":["1489"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["235764"],"_bbp_forum_id":["27835"],"_bbp_engagement":["2592","263442"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["236313"],"_bbp_last_active_id":["236313"],"_bbp_last_active_time":["2022-09-26 15:59:59"]},"test":"jingyangpeng2022163-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/235764","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/235764\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=235764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}