I have this code:
Clear[r,\[Lambda],ref,c]; ft[\[Rho]_]=(((1-ref^2)/(Pi*ref))^2+(\[Rho]^4/(\[Lambda]*r^3))^2)^(-1/2); \[Lambda]=685*10^-9;r=25*10^-3;c=3*10^8;ref=0.995; p1=Plot[ft[\[Rho]*10^-3],{\[Rho],0,1},PlotRange->{{0,1},{0,350}},PlotTheme- >"Monochrome",PlotStyle->Blue, FrameStyle -> {{Blue, Automatic}, {Automatic, Automatic}},Frame -> {{True, False}, {True, True}},FrameTicksStyle -> Directive[16, FontFamily -> "Times"],AspectRatio->1/2,ImagePadding ->{{60, 60}, {50, 10}},FrameLabel -> {{Style[Subscript[\[ScriptCapitalF],t], 16,FontFamily -> "Times"],None},{Style["\[Rho] (mm)", 16,FontFamily -> "Times"],None}},ImageSize->400]; p2=LogPlot[(c/(4*r*ft[\[Rho]*10^-3]))/10^6,{\[Rho],0,1},PlotRange->{{0,1}, {0,350}},PlotTheme->"Monochrome",PlotStyle->Red, FrameStyle -> {{Automatic, Red}, {Automatic, Automatic}},Frame -> {{False, True}, {False, False}},FrameTicks -> {{None, All}, {None, None}},FrameTicksStyle -> Directive[16, FontFamily -> "Times"],AspectRatio->1/2,ImagePadding ->{{60, 60}, {50, 10}},FrameLabel -> {{None,Rotate[Style[Subscript[\[CapitalDelta] \ [Nu] ,m] , 16,FontFamily -> "Times"],180 Degree]},{None,None}},ImageSize- >400]; Overlay[{p1,p2}] Which generates this graph:
I want the red frame label to show as $\Delta\nu_{m}$ (MHz). How can I add the units without messing up the subscript?


Row[{Subscript[...],...}]for that (see the documentation ofRowfor more details) $\endgroup$