An optical recording medium having {TAIL ~ a recording layer} provided on a substrate, said recording layer comprising an organic thin film containing {HEAD ~ at least one diazulenium salt compound} represented by the formula , or , and a recording method using it 
An optical recording medium having { TAIL ~ a recording layer } provided on a substrate , said recording layer comprising an organic thin film containing { HEAD ~ at least one diazulenium salt compound } represented by the formula , or , and a recording method using it
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH