M'zaka zaposachedwa, ofufuza ochokera m'maiko osiyanasiyana agwiritsa ntchito ma photonics ophatikizika kuti azindikire motsatizana kusintha kwa mafunde a infrared ndikuyika pa ma network a 5G othamanga kwambiri, ma chip sensors, ndi magalimoto odziyimira pawokha. Pakadali pano, ndi kuzama kosalekeza kwa njira yofufuzirayi, ofufuza ayamba kuchita kuzindikira mozama magulu ang'onoang'ono owoneka bwino ndikupanga mapulogalamu ambiri, monga magalasi a chip-level LIDAR, AR/VR/MR (enhanced/virtual/hybrid) Reality), ma holographic displays, ma quantum processing chips, ma optogenetic probes omwe amaikidwa muubongo, ndi zina zotero.
Kuphatikiza kwakukulu kwa ma modulators a gawo la kuwala ndiye maziko a dongosolo la kuwala kuti ma optical routing a on-chip ndi mawonekedwe a free-space wavefront. Ntchito ziwiri zazikuluzi ndizofunikira kwambiri pakukwaniritsa ntchito zosiyanasiyana. Komabe, kwa ma optical phase modulators omwe ali mu kuwala kowoneka bwino, zimakhala zovuta kwambiri kukwaniritsa zofunikira za transmittance yayikulu komanso high modulation nthawi imodzi. Kuti akwaniritse izi, ngakhale zinthu zoyenera kwambiri za silicon nitride ndi lithiamu niobate ziyenera kuwonjezera voliyumu ndi kugwiritsa ntchito mphamvu.
Pofuna kuthetsa vutoli, Michal Lipson ndi Nanfang Yu a ku Columbia University adapanga modulator ya silicon nitride thermo-optic phase modulator kutengera adiabatic micro-ring resonator. Iwo adatsimikizira kuti micro-ring resonator imagwira ntchito bwino kwambiri. Chipangizochi chimatha kukwaniritsa kusintha kwa gawo popanda kutayika kwambiri. Poyerekeza ndi ma waveguide phase modulators wamba, chipangizochi chili ndi kuchepa kwakukulu kwa malo ndi mphamvu zomwe zimagwiritsidwa ntchito. Zomwe zili mu Nature Photonics.
Michal Lipson, katswiri wodziwika bwino pankhani ya ma photonics ophatikizidwa, ozikidwa pa silicon nitride, anati: "Chinsinsi cha yankho lathu lomwe tapereka ndikugwiritsa ntchito optical resonator ndikugwira ntchito pamalo otchedwa strong coupling state."
Chowunikira cha kuwala ndi kapangidwe kofanana kwambiri, komwe kumatha kusintha kusintha kwa kachidindo ka refractive kukhala kusintha kwa gawo kudzera mu ma cycle angapo a kuwala. Kawirikawiri, chingagawidwe m'magawo atatu osiyana ogwira ntchito: "pansi pa cholumikizira" ndi "pansi pa cholumikizira." Cholumikizira chofunikira" ndi "cholumikizira champhamvu." Pakati pawo, "pansi pa cholumikizira" chingapereke kusintha kochepa kwa gawo ndipo chidzayambitsa kusintha kosafunikira kwa ma amplitude, ndipo "cholumikizira chofunikira" chidzapangitsa kutayika kwakukulu kwa kuwala, motero kukhudza magwiridwe antchito enieni a chipangizocho.
Kuti akwaniritse kusintha kwathunthu kwa gawo la 2π ndi kusintha kochepa kwa ma amplitude, gulu lofufuza linasintha microring mu mkhalidwe wa "kulumikizana kwamphamvu". Mphamvu yolumikizira pakati pa microring ndi "basi" ndi yokwera kakhumi kuposa kutayika kwa microring. Pambuyo pa mapangidwe angapo ndi kukonza, kapangidwe komaliza kakuwonetsedwa pachithunzi pansipa. Iyi ndi mphete yolumikizana yokhala ndi m'lifupi wocheperako. Gawo lopapatiza la waveguide limawongolera mphamvu yolumikizira ya optical pakati pa "basi" ndi micro-coil. Gawo lowongolera la waveguide lalikulu Kutayika kwa kuwala kwa microring kumachepetsedwa pochepetsa kufalikira kwa kuwala kwa m'mbali.
Heqing Huang, wolemba woyamba wa pepalali, anatinso: “Tapanga modulator yaying'ono, yosunga mphamvu, komanso yotsika kwambiri yowunikira kuwala yokhala ndi radius ya 5 μm yokha komanso mphamvu yogwiritsira ntchito π-phase modulation ya 0.8 mW yokha. Kusintha kwa amplitude komwe kwayambitsidwa ndi kochepera 10%. Chosowa kwambiri ndichakuti modulator iyi imagwiranso ntchito mofanana pamagulu ovuta kwambiri abuluu ndi obiriwira mu spectrum yowoneka.”
Nanfang Yu adanenanso kuti ngakhale kuti sakukwanitsa kulumikiza zinthu zamagetsi, ntchito yawo yachepetsa kwambiri kusiyana pakati pa ma switch a photonic ndi ma switch amagetsi. "Ngati ukadaulo wakale wa modulator unkalola kuphatikiza ma modulators 100 a waveguide phase modulators potengera kuchuluka kwa chip ndi bajeti yamagetsi, ndiye kuti tsopano tikhoza kuphatikiza ma phase shifters 10,000 pa chip yomweyo kuti tikwaniritse Ntchito yovuta kwambiri."
Mwachidule, njira yopangirayi ingagwiritsidwe ntchito pa ma electro-optic modulators kuti achepetse malo ogwiritsidwa ntchito komanso kugwiritsa ntchito magetsi. Ingagwiritsidwenso ntchito m'ma spectral ranges ena ndi mapangidwe ena osiyanasiyana a resonator. Pakadali pano, gulu lofufuzali likugwirizana kuti liwonetse spectrum yowoneka bwino ya LIDAR yopangidwa ndi ma phase shifter arrays kutengera ma microrings otere. M'tsogolomu, ingagwiritsidwenso ntchito pazinthu zambiri monga enhanced optical nonlinearity, ma lasers atsopano, ndi ma quantum optics atsopano.
Gwero la nkhani: https://mp.weixin.qq.com/s/O6iHstkMBPQKDOV4CoukXA
Kampani ya Beijing Rofea Optoelectronics Co., Ltd. yomwe ili ku "Silicon Valley" ku China - Beijing Zhongguancun, ndi kampani yapamwamba kwambiri yodzipereka kutumikira mabungwe ofufuza am'deralo ndi akunja, mabungwe ofufuza, mayunivesite ndi ogwira ntchito zofufuza zasayansi zamabizinesi. Kampani yathu imagwira ntchito yofufuza ndi kupanga zinthu za optoelectronic payokha, kupanga, kupanga, kugulitsa zinthu za optoelectronic, ndipo imapereka mayankho atsopano komanso ntchito zaukadaulo kwa ofufuza asayansi ndi mainjiniya amafakitale. Pambuyo pa zaka zambiri zopanga zinthu zatsopano payokha, yapanga mndandanda wolemera komanso wangwiro wa zinthu zamagetsi, zomwe zimagwiritsidwa ntchito kwambiri m'maboma, m'magulu ankhondo, m'mayendedwe, m'magetsi, m'zachuma, m'maphunziro, m'zachipatala ndi m'mafakitale ena.
Tikuyembekezera mgwirizano ndi inu!
Nthawi yotumizira: Marichi-29-2023