<prompt> Umsebenzi kaBose emkhakheni we-microwave optics wawugxile kakhulu ekufundeni uhlobo lwesimo futhi kwakungeyona imizamo yokuthuthukisa umsakazo ube yindawo yokuxhumana. Izivivinyo zakhe zenzeka ngalesi sikhathi esifanayo kusukela ngasekupheleni kuka-1894 kuya phambili lapho uGuglielmo Marconi enza ukuqhuma ohlelweni lomsakazo olwenzelwe ngqo i-telegraphy engenazintambo kanye nabanye abathola izinhlelo zokusebenza zamaza omsakazo, njengososayensi waseRussia u-Alexander Stepanovich Popov umtshina wesisekelo somsakazo, naye ophefumulelwe isivivinyo sikaLodge. Nakuba umsebenzi kaBose wawungahlobene nokuxhumana, njengoLodge nabanye abacwaningi baselebhu, kungenzeka ukuthi waba nethonya kwabanye abasunguli ukuthuthukisa ukuxhumana njengendawo ephakathi.  <response>: ukuba khona kwama-semiconductors ohlobo lwe-P nohlobo lwe-N 