Heerka soo noqnoqda ee aadka u sarreeya ayaa garaaca leysarka

Heerka soo noqnoqda ee aadka u sarreeya ayaa garaaca leysarka

Dunida microscopic ee isdhexgalka u dhexeeya iftiinka iyo walaxda, garaaca garaaca soo noqnoqda aadka u sarreeya (UHRPs) waxay u dhaqmaan sida xukumada saxda ah ee waqtiga - waxay ku wareegaan in ka badan bilyan jeer ilbiriqsi kasta (1GHz), iyagoo qaadaya faraha molecular ee unugyada kansarka ee sawir muuqaal ah, iyagoo sita tiro badan oo xog ah oo ku saabsan isgaarsiin indhaha ah, iyo isku dubaridka tayada telescopes. Gaar ahaan boodboodka cabbirka ogaanshaha ee lidar, terahertz ultra-sare soo noqnoqda heerka garaaca leysarka (100-300 GHz) waxay noqonayaan aalado awood leh si ay u galaan lakabka faragelinta, dib-u-qaabaynta xudduudaha aragtida saddex-geesoodka ah oo leh awoodda wax-is-daba-marinta spatiotemporal ee heerka photon. Waqtigan xaadirka ah, adeegsiga qaab-dhismeedyo yaryar oo macmal ah, sida godadka giraanta-yar-yar ee u baahan saxnaanta farsamaynta nanoscale si loo dhaliyo isku-dhafka afarta-mawjadaha ah (FWM), waa mid ka mid ah hababka ugu muhiimsan ee lagu helo garaaca garaaca indhaha ee soo noqnoqda aadka u sarreeya. Saynis yahanadu waxay diiradda saarayaan xallinta mashaakilaadka injineernimada ee habaynta qaab dhismeedka aadka u fiican, dhibaatada hagaajinta soo noqnoqda inta lagu jiro bilawga garaaca wadnaha, iyo dhibaatada wax ku oolnimada beddelka ka dib jiilka garaaca wadnaha. Hab kale ayaa ah in la isticmaalo fiilooyinka aan tooska ahayn ee aadka u sarreeya oo laga faa'iidaysto saamaynta xasilloonida wax-ka-beddelka ama saamaynta FWM gudaha daloolka laysarka si loo kiciyo UHRPs. Ilaa hadda, waxaan weli u baahanahay "waqti qaabeeya" ka sii xeel dheer.

Habka soo saarida UHRP iyadoo la isku duro ultrafast pulses si loo kiciyo saameynta FWM ee xun waxaa lagu sifeeyaa "dabitaan ultrafast". Ka duwan nidaamka dalool microring macmal ah ee kor ku xusan oo u baahan bamgareyn joogto ah, hagaajinta saxda ah ee detuning si loo xakameeyo jiilka garaaca wadnaha, iyo isticmaalka warbaahinta aadka u aan toos ahayn si loo yareeyo heerka FWM, this "shiri" waxay ku tiirsan tahay sifooyinka awoodda ugu sarreysa ee garaaca ultrafast si toos ah u kicin FWM, iyo ka dib "shirid off", Gaadhi is-HRP.

Jaantuska 1 wuxuu muujinayaa habka ugu muhiimsan ee lagu gaaro is-abaabulka garaaca wadnaha oo ku salaysan kicinta garaaca wadnaha ultrafast ee godadka giraanta fiber-ka ee kala daadsan. Dibad-baxa abuurka ultrashort ee dibadda laga duray (xilliga T0, soo noqnoqoshada F) waxay u adeegtaa sidii "isha dabka" si ay u kiciso garoon garaaca wadnaha oo sarreeya oo ku dhex jira daloolka kala daadsanaanta. Qaybta faa'iidada intracellular waxay la shaqaysaa is-dhexgal leh qaabeeyaha spectral si loogu beddelo tamarta garaaca abuurka jawaab-celin qaabaysan shanlo iyada oo loo marayo nidaaminta wadajirka ah ee wakhtiga-soo noqnoqda. Nidaamkani wuxuu jebiyaa xaddidaadda bamgareynta joogtada ah ee dhaqameed: garaaca abuurka ayaa dami marka uu gaaro kala daadsanaanta heerka FWM, iyo daloosha kala-baxa waxay ilaalisaa is-abaabulka heerka garaaca wadnaha iyada oo loo marayo dheellitirka firfircoon ee faa'iidada iyo khasaaraha, iyadoo inta jeer ee ku celcelinta garaaca wadnaha ay tahay Fs (oo u dhiganta gudaha gudaha iyo inta jeer ee FFv).

Daraasadani waxay sidoo kale samaysay xaqiijinta aragtida. Iyada oo ku saleysan cabbirrada lagu ansixiyay habaynta tijaabada iyo 1psultrafast pulse laserSida goobta bilowga ah, jilitaanka nambarada ayaa lagu fuliyay habka kobaca ee wakhtiga garaaca wadnaha iyo inta jeer ee gudaha daloolka laysarka. Waxaa la ogaaday in garaaca wadnaha uu soo maray saddex marxaladood: kala qaybsanaanta garaaca wadnaha, oscillation pulse periodic oscillation, iyo qaybinta lebbiska garaaca wadnaha oo dhan dhammaan godka laysarka. Natiijadan tirooyinka ah ayaa sidoo kale si buuxda u xaqiijisa sifooyinka is-abaabulka eelaser garaaca wadnaha.

Iyada oo kicinaysa saamaynta isku dhafka afarta-mawjadaha gudaha godka giraanta fiber-ka ee kala-baxa iyada oo loo marayo dabka abuurka ultrafast abuurka, jiilka is-abaabulaya iyo dayactirka garaaca soo noqnoqda ee THZ ultra-sare ee soo noqnoqda (wax soo saarka xasilloon ee 0.5W awoodda ka dib markii abuurka dami) ayaa si guul leh loo gaadhay, iyada oo bixisa nooc cusub oo il iftiin ah oo loogu talagalay heerka-daruur-hoosaadka. heerka millimitirka. Habka is-xakamaynta garaaca wadnaha ayaa si weyn u yareynaya isticmaalka tamarta nidaamka. Qaab-dhismeedka dhammaan-fiber-ku wuxuu xaqiijiyaa hawlgalka xasilloonida sare ee 1.5 μm qaybta badbaadada indhaha. Raadinta mustaqbalka, tignoolajiyadan ayaa la filayaa inay u kaxayso horumarka lidar-ku-dhejinta gaadiidka ee dhinaca yaraynta (oo ku saleysan MZI-filters-yar) iyo ogaanshaha muddada-dheer (kordhinta awoodda> 1W), oo ay sii kordhiso la qabsiga shuruudaha aragtida jawiga adag iyada oo loo marayo mowjadaha dhererka badan ee isku-dubbaridan dabka iyo nidaaminta caqliga leh.