Micro-nano photonics feem ntau kawm txog txoj cai ntawm kev sib cuam tshuam ntawm lub teeb thiab cov khoom ntawm qhov ntsuas me me thiab nano thiab nws daim ntawv thov hauv kev tsim lub teeb, kev sib kis, kev tswj hwm, kev tshawb pom thiab kev hnov. Micro-nano photonics sub-wavelength cov khoom siv tuaj yeem txhim kho qib ntawm kev sib koom ua ke ntawm photon, thiab nws xav tias yuav koom ua ke cov khoom siv photonic rau hauv lub chip me me optical zoo li cov chips hluav taws xob. Nano-surface plasmonics yog ib qho teb tshiab ntawm micro-nano photonics, uas feem ntau kawm txog kev sib cuam tshuam ntawm lub teeb thiab cov khoom hauv cov hlau nanostructures. Nws muaj cov yam ntxwv ntawm qhov me me, kev kub ceev thiab kov yeej qhov kev txwv diffraction ib txwm muaj. Nanoplasma-waveguide qauv, uas muaj kev txhim kho hauv zos zoo thiab cov yam ntxwv lim dej resonance, yog lub hauv paus ntawm nano-lim, wavelength division multiplexer, optical switch, laser thiab lwm yam khoom siv micro-nano optical. Optical microcavities txwv lub teeb rau cov cheeb tsam me me thiab txhim kho kev sib cuam tshuam ntawm lub teeb thiab cov khoom. Yog li ntawd, optical microcavity nrog qhov zoo tshaj plaws yog ib txoj hauv kev tseem ceeb ntawm kev nkag siab siab thiab kev tshawb pom.
WGM microcavity
Nyob rau xyoo tas los no, qhov microcavity optical tau nyiam ntau tus neeg saib xyuas vim nws muaj peev xwm siv tau zoo thiab muaj txiaj ntsig zoo rau kev tshawb fawb. Lub microcavity optical feem ntau muaj microsphere, microcolumn, microring thiab lwm yam geometries. Nws yog ib hom optical resonator uas nyob ntawm morphologic. Cov nthwv dej teeb pom kev hauv microcavities raug cuam tshuam tag nrho ntawm qhov sib txuas microcavity, ua rau muaj hom resonance hu ua whispering gallery mode (WGM). Piv nrog rau lwm cov optical resonators, microresonators muaj cov yam ntxwv ntawm tus nqi Q siab (ntau dua 106), hom ntim qis, me me thiab yooj yim koom ua ke, thiab lwm yam, thiab tau siv rau kev ntsuas biochemical siab, ultra-low threshold laser thiab nonlinear action. Peb lub hom phiaj tshawb fawb yog nrhiav thiab kawm txog cov yam ntxwv ntawm ntau yam qauv thiab ntau yam morphologies ntawm microcavities, thiab siv cov yam ntxwv tshiab no. Cov lus qhia tshawb fawb tseem ceeb suav nrog: kev tshawb fawb txog cov yam ntxwv optical ntawm WGM microcavity, kev tshawb fawb txog kev tsim khoom ntawm microcavity, kev tshawb fawb txog kev siv microcavity, thiab lwm yam.
WGM microcavity biochemical sensing
Hauv kev sim, hom WGM plaub qib siab M1 (DUAB 1(a)) tau siv rau kev ntsuas kev ntsuas. Piv nrog hom qis, qhov rhiab heev ntawm hom siab tau zoo dua heev (DUAB 1(b)).
Daim Duab 1. Hom Resonance (a) ntawm lub microcapillary cavity thiab nws qhov kev hloov pauv refractive index (b)
Cov lim dej kho qhov muag uas hloov tau nrog tus nqi Q siab
Ua ntej, qhov radial maj mam hloov pauv cylindrical microcavity raug rub tawm, thiab tom qab ntawd qhov kev hloov kho wavelength tuaj yeem ua tiav los ntawm kev txav mus rau qhov chaw sib txuas raws li lub hauv paus ntsiab lus ntawm qhov loj me txij li qhov resonant wavelength (Daim Duab 2 (a)). Qhov kev ua tau zoo thiab kev lim dej bandwidth tau qhia hauv Daim Duab 2 (b) thiab (c). Tsis tas li ntawd, lub cuab yeej tuaj yeem paub txog kev hloov pauv optical nrog qhov tseeb sub-nanometer.
Daim Duab 2. Daim duab qhia txog cov lim dej kho qhov muag uas hloov tau (a), kev ua tau zoo uas hloov tau (b) thiab cov bandwidth ntawm lim dej (c)
WGM microfluidic poob resonator
Hauv cov microfluidic chip, tshwj xeeb tshaj yog rau cov tee dej hauv cov roj (droplet hauv-roj), vim yog cov yam ntxwv ntawm qhov nro ntawm qhov chaw, rau lub cheeb ntawm kaum lossis txawm tias pua pua microns, nws yuav raug dai rau hauv cov roj, tsim ib lub voj voog zoo meej. Los ntawm kev ua kom zoo dua ntawm cov ntsuas refractive, cov tee dej nws tus kheej yog lub resonator spherical zoo meej nrog qhov zoo tshaj plaws ntawm ntau dua 108. Nws kuj zam qhov teeb meem ntawm kev ua pa hauv cov roj. Rau cov tee dej loj, lawv yuav "zaum" ntawm phab ntsa sab saud lossis qis dua vim muaj qhov sib txawv ntawm qhov ceev. Hom tee dej no tsuas yog siv tau hom kev txhawb nqa sab nraud.
Lub sijhawm tshaj tawm: Lub Kaum Hli-23-2023