Enye yezona zinto zibaluleke kakhulu kwimodyuli ye-optical modulator yisantya sayo sokumodareyitha okanye i-bandwidth, ekufuneka ibe ubuncinane ngokukhawuleza njenge-electronics ekhoyo. Iitransistors ezinezandi zohambo ngaphezulu kwe-100 GHz sele zibonisiwe kwi-90 nm teknoloji yesilicon, kwaye isantya siya kunyuka ngakumbi njengoko ubuncinci besayizi besici buncitshiswa [1]. Nangona kunjalo, i-bandwidth yeemodyuli ezisekelwe kwi-silicon yangoku zilinganiselwe. I-Silicon ayinayo i-χ (2) -ukungahambelani ngenxa yesakhiwo sayo sekristale se-centro-symmetric. Ukusetyenziswa kwe-silicon ehlutshiweyo kuye kwakhokelela kwiziphumo ezinomdla esele zikho [2], kodwa i-nonlinearities ayikavumeli izixhobo eziphathekayo. Iimodyuli ze-silicon ze-photonic ze-State-of-the art ke zixhomekeke kwi-free-carrier dispersion kwi-pn okanye i-pin junctions [3-5]. Izidibanisi eziya phambili zibonakaliswe ukubonisa imveliso yobude be-voltage ephantsi njenge-VπL = 0.36 V mm, kodwa isantya sokumodareyitha sinqunyelwe yi-dynamics yabathwali abambalwa. Sekunjalo, amanani edatha ye-10 Gbit / s yenziwe ngoncedo lokugxininiswa kwangaphambili kwesignali yombane [4]. Ukusebenzisa i-reverse biased junctions endaweni yoko, i-bandwidth iye yanda malunga ne-30 GHz [5,6], kodwa imveliso yobude be-voltage yenyuka ukuya kwi-VπL = 40 V mm. Ngelishwa, iimodyuli zesigaba seplasma zesiphumo zivelisa ukumodareyitha okungafunekiyo kunye [7], kwaye ziphendula ngokungahambisani nombane osetyenzisiweyo. Iifomathi zokumodareyitha eziphezulu ezifana ne-QAM zifuna, nangona kunjalo, impendulo yomgca kunye nokuguqulwa kwesigaba esicocekileyo, okwenza ukuxhaphazwa kwempembelelo ye-electro-optic (i-Pockels effect [8]) ngokukhethekileyo enqwenelekayo.
2. Indlela ye-SOH
Kungekudala, indlela ye-silicon-organic hybrid (SOH) iphakanyisiwe [9-12]. Umzekelo we-SOH modulator uboniswe kwi-Fig. 1 (a). Iqulathe i-slot waveguide ekhokelela kwindawo yokubona, kunye nemicu emibini ye-silicon edibanisa ngombane i-waveguide ebonakalayo kwii-electrode zetsimbi. I-electrodes ifumaneka ngaphandle kwendawo ye-optical modal ukuphepha ukulahleka kwe-optical [13], i-Fig. 1 (b). Isixhobo sifakwe i-electro-optic organic material egcwalisa ngokulinganayo indawo yokubeka. Umbane omodareyithayo uthwalwa sisicangca sombane sombane kwaye wehla kwisithuba sombane ngenxa yemicu yesilicon eqhubayo. Umbane obangelwayo emva koko utshintsha isalathiso se-refraction kwi-slot ngokusebenzisa i-ultra-fast electro-optic effect. Ekubeni i-slot inobubanzi ngokulandelelana kwe-100 nm, ii-volts ezimbalwa zanele ukuvelisa amasimi okumodareyitha awomeleleyo akwi-oda lobukhulu bamandla e-dielectric yezinto ezininzi. Ulwakhiwo lunomgangatho ophezulu wokumodareyitha ukususela ekubeni zombini i-modulating kunye nemimandla ye-optical igxininiswe ngaphakathi kwe-slot, i-Fig. 1 (b) [14]. Enyanisweni, ukuphunyezwa kokuqala kweemodyuli ze-SOH kunye nokusebenza kwe-sub-volt [11] sele kubonisiwe, kwaye ukuguqulwa kwe-sinusoidal ukuya kwi-40 GHz kubonisiwe [15,16]. Nangona kunjalo, umceli mngeni wokwakha iimodyuli ze-SOH ezinesantya esiphezulu se-voltage kukudala umtya wokudibanisa oqhuba kakhulu. Kwisekethe elinganayo i-slot inokumelwa yi-capacitor C kunye ne-conductive strips by resistors R, Fig. 1 (b). Ixesha le-RC elihambelanayo lihlala limisela umda we-bandwidth yesixhobo [10,14,17,18]. Ukuze unciphise ukuchasana kwe-R, kuye kwacetyiswa ukuba kufakwe i-silicon strips [10,14]. Nangona i-doping ikwandisa ukuqhutyelwa kweentambo ze-silicon (kwaye ngoko kwandisa ilahleko ye-optical), umntu uhlawula intlawulo eyongezelelweyo yelahleko ngenxa yokuba ukuhamba kwe-electron kuphazamisekile ngokusasazwa kokungcola [10,14,19]. Ngaphezu koko, iinzame zokwenziwa zamva nje zibonise ukuhanjiswa okuphantsi ngokungalindelekanga.
I-Beijing Rofea Optoelectronics Co., Ltd. ebekwe eTshayina “kwiSilicon Valley” – iBeijing Zhongguancun, lishishini lobugcisa obuphezulu obuzinikele ekukhonzeni amaziko ophando asekhaya nawangaphandle, amaziko ophando, iiyunivesithi kunye nabasebenzi bophando lwezenzululwazi kushishino. Inkampani yethu ibandakanyeka ikakhulu kuphando oluzimeleyo kunye nophuhliso, uyilo, ukuvelisa, ukuthengisa iimveliso ze-optoelectronic, kwaye ibonelela ngezisombululo ezintsha kunye neenkonzo zobuchwephesha, ezenzelwe umntu abaphandi besayensi kunye neenjineli zeshishini. Emva kweminyaka yokwenziwa kwezinto ezizimeleyo, yenze uluhlu olutyebileyo nolugqibeleleyo lweemveliso zombane, ezisetyenziswa kakhulu kumasipala, emkhosini, kwezothutho, kumandla ombane, ezemali, ezemfundo, ezonyango kunye namanye amashishini.
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Ixesha lokuposa: Mar-29-2023