Rangahau Hou mō te taiaho whānui-rārangi whaiti

Rangahau Hou mōrēseri whānui-rārangi whaiti

He mea nui te taiaho whānui-rārangi whaiti i roto i te whānuitanga o ngā tono pēnei i te pūoko tika, te tirotiro irahiko, me te pūtaiao irahiko. Haunga te whānui o te irahiko, he mea nui anō hoki te āhua o te irahiko, e whakawhirinaki ana ki te horopaki tono. Hei tauira, ko te mana i ngā taha e rua o te raina taiaho ka puta he hapa i roto i te whakahaere whatu o ngā qubits, ā, ka pā ki te tika o ngā karaka atomika. Mō te haruru auau taiaho, ko ngā wāhanga Fourier i hangaia e te irahiko ohorere e uru ana ki terēseriKo te tikanga he teitei ake te aratau i te 105 Hz, ā, ko ēnei wāhanga te whakatau i ngā kaha i ngā taha e rua o te rārangi. Mā te whakakotahi i te tauwehe whakarei ake a Henry me ētahi atu tauwehe, ka tautuhia te rohe matū, arā, te rohe Schawlow-Townes (ST). Whai muri i te whakakorenga o ngā haruru hangarau pēnei i te wiri o te kōhao me te nekeneke roa, ka whakatau tēnei rohe i te rohe o raro o te whānui raina whai hua ka taea. Nō reira, ko te whakaiti i te haruru matū he taahiraa matua i roto i te hoahoa ongā taiaho whānui-rārangi.

Nō nā tata nei, kua whakawhanakehia e ngā kairangahau tētahi hangarau hou ka taea te whakaiti i te whānui o ngā hihi taiaho neke atu i te tekau mano ngā wā. Tērā pea ka tino hurihia e tēnei rangahau ngā mara o te rorohiko irahiko, ngā karaka ngota me te kimi ngaru ā-papa. I whakamahia e te rōpū rangahau te kaupapa o te marara Raman whakaohooho kia taea ai e ngā taiaho te whakaoho i ngā wiri auau teitei ake i roto i te rauemi. Ko te pānga o te whakawhāiti i te whānui o te raina he mano ngā wā teitei ake i tērā o ngā tikanga tuku iho. Ko te tikanga, he rite ki te whakaaro i tētahi hangarau purenga ā-ira taiaho hou ka taea te whakamahi ki ngā momo taiaho whakauru rerekē. He putanga nui tēnei i roto i te mara ohangarau taiaho.

Kua whakatauhia e tēnei hangarau hou te raruraru o ngā huringa wā ngaru mārama matapōkere iti e whakaiti ana i te parakore me te tika o ngā hihi laser. I roto i te laser pai rawa atu, me tino rite te tukutahi o ngā ngaru mārama katoa – engari i roto i te mooni, ko ētahi ngaru mārama kei mua, kei muri rānei i ētahi atu, ka puta he rerekētanga i roto i te āhua o te mārama. Ka puta he "haruru" i roto i te whānuitanga laser e ēnei rerekētanga āhua – ka whakapōrearea i te auau o te laser, ka whakaiti i tōna parakore tae. Ko te kaupapa o te hangarau Raman ko te huri i ēnei rerekētanga wā ki ngā wiri i roto i te karaihe taimana, ka tere te mimiti me te memeha atu o ēnei wiri (i roto i te torutoru tiriona o te hēkona). Mā tēnei ka maeneene ake ngā wiri o ngā ngaru mārama e toe ana, ā, ka eke ki te parakore teitei ake o te whānuitanga, ā, ka puta he pānga whakawhāiti nui ki tete whānuitanga o te taiaho.