Isishwankathelo se-linear optics kunye ne-nonlinear optics
Ngokusekelwe kunxibelelwano lokukhanya nezinto, ii-optics zinokwahlulwa zibe yi-linear optics (LO) kunye ne-nonlinear optics (NLO). I-Linear optics (LO) sisiseko se-classical optics, egxile kunxibelelwano oluhambelanayo lokukhanya. Ngokwahlukileyo koko, ii-nonlinear optics (NLO) zenzeka xa amandla okukhanya engahambelani ngokuthe ngqo nempendulo ye-optical yezinto, ingakumbi phantsi kweemeko ezikhanyayo, ezifana nee-laser.
I-Linear Optics (LO)
Kwi-LO, ukukhanya kusebenzisana nezinto ezikwi-intensities ephantsi, ngokuqhelekileyo kubandakanya i-photon enye kwi-atom okanye kwi-molecule. Olu nxibelelwano lubangela ukuphambuka okuncinci kwimeko ye-athomu okanye ye-molecular, ihlale ikwimeko yayo yendalo, engaphazanyiswanga. Umgaqo osisiseko kwi-LO kukuba i-dipole ebangelwa yintsimi yombane ilingana ngokuthe ngqo namandla entsimi. Ke ngoko, i-LO iyahlangabezana nemigaqo ye-superposition kunye ne-additivity. Umgaqo we-superposition uthi xa inkqubo iphantsi kwamaza amaninzi e-electromagnetic, impendulo iyonke ilingana nesimbuku seempendulo zomntu ngamnye kwi-wave nganye. I-additivity ngokufanayo ibonisa ukuba impendulo iyonke yenkqubo ye-optical eyinkimbinkimbi inokugqitywa ngokudibanisa iimpendulo zezinto zayo zodwa. Umgca kwi-LO uthetha ukuba ukuziphatha kokukhanya kuhlala kuhleli njengoko ubunzulu butshintsha - imveliso ihambelana nokufakwa. Ukongeza, kwi-LO, akukho kuxubana kwamaza, ngoko ke ukukhanya okudlula kwinkqubo enjalo kugcina i-frequency yayo nokuba idlula ekukhuliseni okanye ekuguqulweni kwesigaba. Imizekelo ye-LO ibandakanya ukusebenzisana kokukhanya nezinto ezisisiseko ze-optical ezifana neelensi, izibuko, ii-wave plates, kunye ne-diffraction gratings.
Ii-Optics ezingezizo ezithe ngqo (i-NLO)
I-NLO yahlulwe yimpendulo yayo engeyomgca ekukhanyeni okunamandla, ingakumbi phantsi kweemeko zobushushu obuphezulu apho imveliso ingalingani namandla okufaka. Kwi-NLO, ii-photon ezininzi zidibana nezinto ngaxeshanye, nto leyo ebangela ukuxubana kokukhanya kunye notshintsho kwi-refractive index. Ngokungafaniyo ne-LO, apho ukuziphatha kokukhanya kuhlala kufana nokuba bubungakanani na ubunzulu, iziphumo ezingeyomgca zibonakala kuphela kubunzulu bokukhanya obugqithisileyo. Kulo bushushu, imithetho elawula ukusebenzisana kokukhanya, njengomgaqo we-superposition, ayisasebenzi, kwaye ne-vacuum ngokwayo inokuziphatha ngendlela engeyomgca. Ukungalingani kokunxibelelana phakathi kokukhanya kunye ne-matter kuvumela ukusebenzisana phakathi kwee-frequency zokukhanya ezahlukeneyo, okubangela iziganeko ezifana nokuveliswa kwe-harmonic, kunye nokuveliswa kwe-sum kunye ne-difference frequency. Ukongeza, ii-optics ezingeyomgca ziquka iinkqubo ze-parametric apho amandla okukhanya asasazwa khona ukuvelisa ii-frequency ezintsha, njengoko kubonakala kwi-parametric amplification kunye ne-oscillation. Olunye uphawu olubalulekileyo yi-self-phase modulation, apho isigaba se-light wave sitshintshwa ngamandla aso - isiphumo esidlala indima ebalulekileyo kunxibelelwano lwe-optical.
Ukusebenzisana kwezinto ezikhanyayo kwi-optics ethe ngqo nengaphelelanga
Kwi-LO, xa ukukhanya kudibana nezinto, impendulo yezinto ihambelana ngqo nobukhulu bokukhanya. Ngokwahlukileyo koko, i-NLO ibandakanya izinto ezisabela kungekuphela nje kubukhulu bokukhanya, kodwa nakwiindlela ezintsonkothileyo. Xa ukukhanya okunamandla aphezulu kubetha izinto ezingezizo ezithe ngqo, kunokuvelisa imibala emitsha okanye kutshintshe ukukhanya ngeendlela ezingaqhelekanga. Umzekelo, ukukhanya okubomvu kunokuguqulwa kube kukukhanya okuluhlaza kuba impendulo yezinto ibandakanya okungaphezulu nje kotshintsho olulinganayo - inokubandakanya ukuphindaphindwa kwamaza okanye ezinye iindlela ezintsonkothileyo. Olu hlobo lokuziphatha lukhokelela kwiseti entsonkothileyo yeziphumo zokukhanya ezingabonakaliyo kwizinto eziqhelekileyo ezithe ngqo.
Ukusetyenziswa kweendlela zokukhanya ezithe ngqo nezingezomgca
I-LO igubungela uluhlu olubanzi lwetekhnoloji ye-optical esetyenziswa kakhulu, kubandakanya iilensi, izibuko, iipleyiti zamaza, kunye nee-diffraction gratings. Ibonelela ngesakhelo esilula nesinokubalwa sokuqonda indlela yokukhanya kwiinkqubo ezininzi ze-optical. Izixhobo ezifana nee-phase shifters kunye ne-beam splitters zihlala zisetyenziswa kwi-LO, kwaye intsimi iguqukele kwinqanaba apho iisekethe ze-LO zifumene udumo. Ezi sekethe ngoku zibonwa njengezixhobo ezisebenzayo ezininzi, kunye nezicelo kwiindawo ezifana ne-microwave kunye ne-quantum optical signal processing kunye ne-emerging bioheuristic computing architectures. I-NLO intsha kwaye itshintshe amasimi ahlukeneyo ngezicelo zayo ezahlukeneyo. Kwicandelo lonxibelelwano, idlala indima ephambili kwiinkqubo ze-fiber optic, ichaphazela imida yokudluliselwa kwedatha njengoko amandla e-laser enyuka. Izixhobo zohlalutyo ziyazuza kwi-NLO ngokusebenzisa iindlela eziphambili ze-microscopy ezifana ne-confocal microscopy, ebonelela ngemifanekiso ye-high-resolution, yendawo. I-NLO ikwaphucula ii-laser ngokuvumela uphuhliso lwee-laser ezintsha kunye nokuguqula iipropati ze-optical. Ikwaphucule iindlela ze-optical imaging zokusetyenziswa kwamayeza ngokusebenzisa iindlela ezifana ne-second-harmonic generation kunye ne-two-photon fluorescence. Kwi-biophotonics, i-NLO inceda ekufotweni okunzulu kwezicubu ngomonakalo omncinci kwaye ibonelela ngokwahlukana kwe-biochemical okukhululekileyo. Eli candelo linetekhnoloji ye-terahertz ephucukileyo, eyenza kube nokwenzeka ukuvelisa iipulses ze-terahertz zexesha elinye ezinamandla. Kwi-quantum optics, iziphumo ezingezizo ezilandelelanayo zinceda unxibelelwano lwe-quantum ngokulungiselela ii-frequency converters kunye ne-equivalents ze-photon ezidibeneyo. Ukongeza, izinto ezintsha ze-NLO kwi-Brillouin scattering zincede ekucutshungulweni kwe-microwave kunye nokudibanisa ukukhanya. Ngokubanzi, i-NLO iyaqhubeka nokuhambisa imida yetekhnoloji kunye nophando kwiinkalo ezahlukeneyo.
I-Optics ethe tye nengathe tye kunye nefuthe layo kwitekhnoloji ephucukileyo
I-Optics idlala indima ebalulekileyo kwizicelo zemihla ngemihla kunye netekhnoloji ephucukileyo. I-LO ibonelela ngesiseko seenkqubo ezininzi ze-optical eziqhelekileyo, ngelixa i-NLO iqhuba ubugcisa kwiindawo ezifana nonxibelelwano, i-microscopy, itekhnoloji ye-laser, kunye ne-biophotonics. Inkqubela phambili yakutshanje kwi-NLO, ngakumbi njengoko inxulumene nezinto ezinemilinganiselo emibini, ifumene ingqwalasela eninzi ngenxa yezicelo zayo zoshishino nezenzululwazi ezinokubakho. Izazinzulu zikwahlola izixhobo zanamhlanje ezifana namachaphaza e-quantum ngohlalutyo olulandelelanayo lweempawu ezithe tye nezingezizo ezithe tye. Njengoko uphando luqhubeka, ukuqonda okudibeneyo kwe-LO kunye ne-NLO kubalulekile ekutyhaleni imida yetekhnoloji kunye nokwandisa amathuba esayensi ye-optical.
Ixesha leposi: Novemba-11-2024