bsp;&nbsp; type | nx | ny | nz | omega | envelope_function_name
 <br>%</tt>
<br><br>
 The three (possibly complex) numbers (<i>nx</i>, <i>ny</i>, <i>nz</i>) mark the polarization
 direction of the field. The float <tt>omega</tt> will be the carrier frequency of the
 pulse. The envelope of the field is a time-dependent function whose definition
 must be given in a <tt>TDFunctions</tt> block. <tt>envelope_function_name</tt> is a string (and therefore
 it must be surrounded by quotation marks) that must match 