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´úÂëÈçÏ£¬x,yÊÇÏëÒªÄâºÏµÄÇúÏß¶ÔÓ¦µÄx£¬yÖµ£»L1£¬L2ÊÇÏëÒªÄâºÏµÄ²ÎÊý£» ÏÂÃæ¾ÍÊÇһϵÁеľØÕó¼ÆË㣬ͨ¹ýxÇóµÃy ʹÓÃft=fittype('c(x,£¬L1£¬L2)'); ³öÏÖ´íÎó£º ´íÎóʹÓà fittype/testCustomModelEvaluation (line 12) Expression c(x,L1,L2) is not a valid MATLAB expression, has non-scalar coefficients, or cannot be evaluated: Error in fittype expression ==> c(x,L1,L2) ??? Ë÷Òý³¬³ö¾ØÕóά¶È¡£ ³ö´í fittype>iCreateFittype (line 371) testCustomModelEvaluation( obj ); ³ö´í fittype (line 328) obj = iCreateFittype( obj, varargin{:} ); ÔÒò: ´íÎóʹÓà fittype/evaluate (line 102) Error in fittype expression ==> c(x,L1,L2) ??? Ë÷Òý³¬³ö¾ØÕóά¶È¡£ Ôõô½â¾öÕâ¸öÎÊÌ⣿»¹ÓÐÆäËûÄâºÏ°ì·¨Âð£¿ÇóÖúºÃÐĵÄ̳ÓÑ~~~~~~~~~~~~~~~~~~~ ![]() ![]() function [ y ] = c(x,L1£¬L2) %UNTITLED2 ´Ë´¦ÏÔʾÓйش˺¯ÊýµÄÕªÒª % ´Ë´¦ÏÔʾÏêϸ˵Ã÷ m=20; % number of section n1 = 2.8924; %AlAs n2 = 3.3702; %GaAS na=1; ns=n2; ra=(na-n2)/(na+n2); r=(n2-n1)/(n2+n1); ta=sqrt(1-ra^2); t=sqrt(1-r^2); y=zeros(1,2500); ab1=0; ab2=0; for kl=1:2500 beta1 = 2*pi*n1/x(kl)-1i*ab1/2; beta2 = 2*pi*n2/x(kl)-1i*ab2/2; T11_a = exp(1i*beta2*L2)/ta; T12_a = ra*exp(-1i*beta2*L2)/ta; T21_a = ra*exp(1i*beta2*L2)/ta; T22_a = exp(-1i*beta2*L2)/ta; T=[T11_a,T12_a;T21_a,T22_a]; for k=1:m-1 T11_n2 = exp(1i*beta1*L1)/t; T12_n2 = r*exp(-1i*beta1*L1)/t; T21_n2 = r*exp(1i*beta1*L1)/t; T22_n2 = exp(-1i*beta1*L1)/t; T_n2=[T11_n2,T12_n2;T21_n2,T22_n2]; T=T*T_n2; T11_n1 = exp(1i*beta2*L2)/t; T12_n1 = -r*exp(-1i*beta2*L2)/t; T21_n1 = -r*exp(1i*beta2*L2)/t; T22_n1 = exp(-1i*beta2*L2)/t; T_n1=[T11_n1,T12_n1;T21_n1,T22_n1]; T=T*T_n1; end T11_n2 = exp(1i*beta1*L1)/t; T12_n2 = r*exp(-1i*beta1*L1)/t; T21_n2 = r*exp(1i*beta1*L1)/t; T22_n2 = exp(-1i*beta1*L1)/t; T_n2=[T11_n2,T12_n2;T21_n2,T22_n2]; T=T*T_n2; T_12=[1/t,-r/t;-r/t,1/t]; % from n1 to n2, just cross the interface T = T*T_12; T11_c = exp(1i*beta2*2*L2); T12_c = 0; T21_c = 0; T22_c = exp(-1i*beta2*2*L2); T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity T = T*T_c; for k=(1:m) T11_n2 = exp(1i*beta1*L1)/t; T12_n2 = r*exp(-1i*beta1*L1)/t; T21_n2 = r*exp(1i*beta1*L1)/t; T22_n2 = exp(-1i*beta1*L1)/t; T_n2=[T11_n2,T12_n2;T21_n2,T22_n2]; T=T*T_n2; T11_n1 = exp(1i*beta2*L2)/t; T12_n1 = -r*exp(-1i*beta2*L2)/t; T21_n1 = -r*exp(1i*beta2*L2)/t; T22_n1 = exp(-1i*beta2*L2)/t; T_n1=[T11_n1,T12_n1;T21_n1,T22_n1]; T=T*T_n1; end T11_n2 = exp(1i*beta1*L1)/t; T12_n2 = r*exp(-1i*beta1*L1)/t; T21_n2 = r*exp(1i*beta1*L1)/t; T22_n2 = exp(-1i*beta1*L1)/t; T_n2=[T11_n2,T12_n2;T21_n2,T22_n2]; T=T*T_n2; T_12=[1/t,-r/t;-r/t,1/t]; T = T*T_12; T11_c = exp(1i*beta2*9*L2); T12_c = 0; T21_c = 0; T22_c = exp(-1i*beta2*9*L2); T_c = [T11_c,T12_c;T21_c,T22_c]; % n2 cavity T = T*T_c; T11_n2 = exp(1i*beta1*L1)/t; T12_n2 = r*exp(-1i*beta1*L1)/t; T21_n2 = r*exp(1i*beta1*L1)/t; T22_n2 = exp(-1i*beta1*L1)/t; T_n2=[T11_n2,T12_n2;T21_n2,T22_n2]; T=T*T_n2; rs1=(n1-ns)/(ns+n1); ts1=sqrt(1-rs1^2); T11_s = 1/ts1; % n1 to substrate T12_s = rs1/ts1; T21_s = rs1/ts1; T22_s = 1/ts1; T_s = [T11_s,T12_s;T21_s,T22_s]; T=T*T_s; y(kl) = (abs(T(2,1)/T(1,1)))^2; end end ![]() ![]() |
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