Abaseshi benze i-chip ezacile ngokwedlulele enesekethe ehlanganisiwe ye-photonic engase isetshenziselwe ukuxhaphaza lokho okubizwa ngegebe le-terahertz - elele phakathi kuka-0.3-30THz ku-spectrum kagesi - ukuze uthole i-spectroscopy ne-imaging.
Lesi gebe okwamanje siyinto efile yobuchwepheshe, echaza amafrikhwensi ashesha kakhulu kumadivayisi anamuhla kagesi nezokuxhumana, kodwa anensa kakhulu kuma-optics kanye nezinhlelo zokusebenza zokuthwebula izithombe.
Kodwa-ke, i-chip entsha yososayensi manje isibenza bakwazi ukukhiqiza amaza e-terahertz anefrikhwensi ehambisanayo, ubude be-waveleng, amplitude kanye nesigaba. Ukulawula okunembayo okunjalo kungenza imisebe ye-terahertz isetshenziswe ezinsizeni zesizukulwane esilandelayo kuzo zombili izindawo zikagesi nezamehlo.
Umsebenzi, owenziwe phakathi kwe-EPFL, ETH Zurich kanye neNyuvesi yaseHarvard, ushicilelwe kuUkuxhumana Kwemvelo.
UCristina Benea-Chelmus, obehola ucwaningo eLabhorethri yeHybrid Photonics (HYLAB) e-EPFL's School of Engineering, wachaza ukuthi ngenkathi amagagasi e-terahertz ekhiqizwe endaweni yelebhu ngaphambilini, izindlela zangaphambilini bezithembele kakhulu kumakristalu ayinqwaba ukukhiqiza amaza afanele. Esikhundleni salokho, ukusebenzisa kwelebhu yakhe isekethe ye-photonic, eyenziwe nge-lithium niobate futhi yaqoshwa kahle esikalini se-nanometer ngabahlanganyeli eNyuvesi yase-Harvard, kwenza indlela elula kakhulu. Ukusetshenziswa kwe-silicon substrate kwenza futhi idivayisi ifanele ukuhlanganiswa ezinhlelweni ze-electronic kanye ne-optical.
"Ukukhiqiza amaza ngamaza aphakeme kakhulu kuyinselele enkulu, futhi mancane kakhulu amasu angawakhiqiza ngamaphethini ahlukile," echaza. "Manje sesiyakwazi ukwenza ukwakheka kwesikhashana kwamagagasi e-terahertz - ukusho ukuthi, 'Ngifuna i-waveform ebukeka kanje.'”
Ukuze kuzuzwe lokhu, ilebhu ka-Benea-Chelmus yaklama ukuhlelwa kwe-chip yamashaneli, okubizwa ngokuthi ama-waveguides, ngendlela yokuthi izimpondo ezincane zingasetshenziswa ukusakaza amaza e-terahertz akhiqizwa ukukhanya okuvela emiculweni yokubona.
"Iqiniso lokuthi idivayisi yethu isivele isebenzisa isignali evamile ye-optical kuyinzuzo ngempela, ngoba kusho ukuthi lawa ma-chips amasha angasetshenziswa ngamalaser endabuko, asebenza kahle kakhulu futhi aqondwa kahle kakhulu. Kusho ukuthi idivayisi yethu iyahambisana nezokuxhumana," kugcizelela u-Benea-Chelmus. Wengeze ngokuthi amadivayisi amancane athumela futhi amukele amasiginali ebangeni le-terahertz angadlala indima ebalulekile kumasistimu eselula esizukulwane sesithupha (6G).
Emhlabeni wezokubona, i-Benea-Chelmus ibona amandla athile ama-chips e-lithium niobate amancane ku-spectroscopy ne-imaging. Ngaphezu kokungabi ne-ionising, amagagasi e-terahertz anamandla aphansi kakhulu kunezinye izinhlobo eziningi zamagagasi (njengama-x-reyi) asetshenziswayo okwamanje ukuze anikeze ulwazi mayelana nokwakheka kwento ethile – noma ngabe ithambo noma umdwebo kawoyela. Ngakho-ke idivayisi ehlangene, engacekeli phansi njenge-lithium niobate chip ingase inikeze enye indlela engavamile kakhulu kumasu amanje we-spectrographic.
"Ungacabanga uthumela imisebe ye-terahertz ngento oyithandayo futhi uyihlaziye ukuze ulinganise ukusabela kwento, kuye ngesakhiwo sayo samangqamuzana. Konke lokhu kusuka emshinini omncane kunekhanda likamentshisi," esho.
Okulandelayo, i-Benea-Chelmus ihlela ukugxila ekulungiseni izakhiwo zamagagasi e-chip nama-antenna ukuze enze ama-waveform kanjiniyela anama-amplitude amakhulu, kanye namafrikhwensi ashunwe kahle kakhulu kanye namazinga okubola. Uphinde abone ukuthi kungenzeka ubuchwepheshe be-terahertz obuthuthukiswe elebhu yakhe bube wusizo ekusetshenzisweni kwe-quantum.
"Kunemibuzo eminingi ebalulekile okufanele siphendule ngayo; isibonelo, sinesithakazelo sokuthi singasebenzisa ama-chips anjalo ukuze sikhiqize izinhlobo ezintsha zemisebe ye-quantum engasetshenziswa ngezilinganiso zesikhathi esifushane kakhulu. Amagagasi anjalo kusayensi ye-quantum angasetshenziswa ukulawula izinto ze-quantum," waphetha.
Isikhathi sokuthumela: Feb-14-2023
