Садржај

Contemporary Materials I−1 (2010)

Contemporary Materials, I–1 (2010)     Page 31 - 38

UDK 538.9

SPECIFICITIES IN OPTICAL ABSORPTION OF ULTRATHIN MOLECULAR FILM-STRUCTURES

J. P. Šetrajčić1,2, D. Lj. Mirjanić2

1 University of Novi Sad, Faculty of Sciences, Department of Physics, 21000 Novi Sad, Trg Dositeja Obradovića 4, Vojvodina, Serbia
2 The Academy of Sciences and Arts of the Republic of Srpska, 78000 Banja Luka, Trg srpskih vladara 2/2, Republic of Srpska, B&H

Abstract

This pa­per re­pre­sents a the­o­re­ti­cal study of chan­ges of fun­da­men­tal op­ti­cal pro­per­ti­es in symme­tric per­tur­bed qu­a­si-two-di­men­si­o­nal struc­tu­res – na­no­film mo­le­cu­lar crystal pat­terns. The energy spec­trum and the sta­te of ex­ci­tons, as well as the­ir spa­tial distri­bu­tion along the bor­der layer (by layers) was fo­und on the ba­sis of adju­sted Green’s fun­cti­ons and analytic-nu­me­ri­cal cal­cu­la­ti­ons. Re­la­ti­ve per­mit­ti­vity was de­ter­mi­ned and the in­fluen­ce of li­mit pa­ra­me­ters on the oc­cur­ren­ce of re­so­nant ab­sorp­tion was stu­died. De­pen­den­ce of the ab­sorp­tion in­dex on the fre­qu­ency of ex­ter­nal elec­tro­mag­ne­tic fi­eld was fo­und and se­lec­ti­ve ab­sorp­tion de­fi­ned with na­no­films with symme­tric bor­der sur­fa­ces.

Keywords: Ex­ci­tons, na­no­struc­tu­res, Green’s fun­cti­ons, per­mit­ti­vity, ab­sorp­tion in­dex, re­so­nant ab­sorp­tion.

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