I-laser esebenza kahle kakhulu enobukhulu obungangesihloko somunwe

Ukusebenza okuphezului-laser esheshayo kakhuluusayizi wesihloko somunwe

Ngokusho kwesihloko esisha sekhava esishicilelwe kumagazini i-Science, abacwaningi e-City University of New York babonise indlela entsha yokudala ukusebenza okuphezuluama-laser asheshayo kakhulukuma-nanophotonics. Le modi encane ivaliwei-laserikhipha uchungechunge lwezibani ezimfushane kakhulu ezihambisanayo zokukhanya ngezikhathi ze-femtosecond (ama-trillionths omzuzwana).

Imodi ye-Ultrafast ivaliweama-laserkungasiza ekuvuleni izimfihlo zezikhathi ezisheshayo zemvelo, njengokwakheka noma ukuqhekeka kwezibopho zama-molecule ngesikhathi sokusabela kwamakhemikhali, noma ukusabalala kokukhanya ezindaweni eziguquguqukayo. Isivinini esiphezulu, ukuqina kwe-peak pulse, kanye nokumbozwa okubanzi kwama-laser avaliwe ngemodi nakho kuvumela ubuchwepheshe obuningi be-photon, kufaka phakathi amawashi e-athomu optical, izithombe zezinto eziphilayo, kanye namakhompyutha asebenzisa ukukhanya ukubala nokucubungula idatha.

Kodwa ama-laser athuthuke kakhulu akhiywe ngemodi asabiza kakhulu, izinhlelo zedeskithophu ezidinga amandla ezinqunyelwe ukusetshenziswa kwelabhorethri. Umgomo wocwaningo olusha ukuguqula lokhu kube uhlelo olulingana ne-chip olungakhiqizwa ngobuningi futhi lusetshenziswe ensimini. Abacwaningi basebenzise ipulatifomu yezinto ezisafufusa ye-lithium niobate (TFLN) ukuze bakhe futhi balawule ngokunembile ama-laser pulses ngokusebenzisa amasignali kagesi e-radio frequency angaphandle kuyo. Ithimba lihlanganise inzuzo ephezulu ye-laser yama-semiconductors ekilasi III-V kanye nekhono elisebenzayo lokwakha ama-pulse lama-waveguides e-photonic e-TFLN nanoscale ukuthuthukisa i-laser ekhipha amandla aphezulu okukhipha ama-watts angu-0.5.

Ngaphezu kobukhulu bayo obuncane, obungangomunwe, i-laser esanda kuboniswa ekhiywe ngemodi nayo ibonisa izici eziningana ezingafinyelelwa yi-laser yendabuko, njengekhono lokulungisa ngokunembile izinga lokuphindaphinda kwe-pulse yokukhipha ebangeni elibanzi lama-megahertz angu-200 ngokulungisa nje ugesi wephampu. Ithimba linethemba lokufinyelela umthombo wekamu ozinzile, ojwayelekile, osezingeni le-chip ngokusebenzisa ukulungiswa kabusha okunamandla kwe-laser, okubalulekile ekuboneni ngokunembile. Izicelo ezisebenzayo zifaka phakathi ukusetshenziswa kwamafoni aphathwayo ukuxilonga izifo zamehlo, noma ukuhlaziya i-E. coli namagciwane ayingozi ekudleni nasendaweni ezungezile, kanye nokuvumela ukuzulazula lapho i-GPS yonakele noma ingatholakali.