Kodi ma micro-nano photonics ndi chiyani?

Ma Micro-nano photonics makamaka amaphunzira lamulo la kulumikizana pakati pa kuwala ndi zinthu pamlingo wa micro ndi nano ndikugwiritsa ntchito kwake pakupanga kuwala, kufalitsa, kuwongolera, kuzindikira ndi kuzindikira.Zida za Micro-nano photonics sub-wavelength zimatha kupititsa patsogolo kuchuluka kwa kuphatikiza kwa photon, ndipo akuyembekezeka kuphatikiza zida za Photonic kukhala chip chaching'ono chowoneka ngati tchipisi tamagetsi.Nano-surface plasmonics ndi gawo latsopano la ma micro-nano photonics, omwe makamaka amaphunzira kuyanjana pakati pa kuwala ndi zinthu muzitsulo zachitsulo.Ili ndi mawonekedwe ang'onoang'ono, kuthamanga kwambiri ndikugonjetsa malire achikhalidwe cha diffraction.Mapangidwe a Nanoplasma-waveguide, omwe ali ndi mawonekedwe abwino akumalo akumaloko ndikusefa kwa resonance, ndiye maziko a nano-filter, wavelength division multiplexer, optical switch, laser ndi zida zina zazing'ono za nano.Ma microcavities a Optical amatsekereza kuwala kumadera ang'onoang'ono ndipo amathandizira kwambiri kulumikizana pakati pa kuwala ndi zinthu.Chifukwa chake, kuwala kwa microcavity yokhala ndi chinthu chapamwamba kwambiri ndi njira yofunika kwambiri yozindikira komanso kuzindikira.

WGM microcavity

M'zaka zaposachedwa, optical microcavity yakopa chidwi kwambiri chifukwa cha kuthekera kwake kogwiritsa ntchito komanso kufunikira kwa sayansi.Optical microcavity imakhala ndi microsphere, microcolumn, microring ndi ma geometries ena.Ndi mtundu wa morphologic wodalira kuwala resonator.Mafunde a kuwala mu microcavities amawonekera bwino pa mawonekedwe a microcavity, zomwe zimapangitsa kuti pakhale mawonekedwe a resonance otchedwa whispering gallery mode (WGM).Poyerekeza ndi ma resonator ena owoneka bwino, ma microresonator ali ndi mawonekedwe apamwamba a Q (oposa 106), voliyumu yotsika, kakulidwe kakang'ono komanso kuphatikiza kosavuta, ndi zina zambiri, ndipo amagwiritsidwa ntchito pozindikira za biochemical sensing, Ultra-low threshold laser and zochita zopanda malire.Cholinga chathu chofufuza ndikupeza ndikuwerenga mawonekedwe amitundu yosiyanasiyana ndi ma morphology osiyanasiyana a microcavities, ndikugwiritsa ntchito mawonekedwe atsopanowa.Njira zazikulu zofufuzira zikuphatikiza: kafukufuku wamawonekedwe a WGM microcavity, kafukufuku waukadaulo wa microcavity, kafukufuku wogwiritsa ntchito microcavity, ndi zina zambiri.

WGM microcavity biochemical sensing

Poyesera, mawonekedwe anayi apamwamba a WGM M1 (FIG. 1 (a)) adagwiritsidwa ntchito pozindikira muyeso.Poyerekeza ndi mawonekedwe otsika, kukhudzidwa kwa machitidwe apamwamba kunasintha kwambiri (FIG. 1 (b)).

Chithunzi 1. Resonance mode (a) ya microcapillary cavity ndi sensitivity yake refractive index (b)

Zosefera za tunable zokhala ndi mtengo wapamwamba wa Q

Choyamba, ma radial akusintha pang'onopang'ono ma cylindrical microcavity amakokedwa, ndiyeno kuwongolera kwa mafunde kumatha kutheka mwa kusuntha mwamakani malo olumikizirana potengera mfundo ya kukula kwa mawonekedwe kuyambira kutalika kwa resonant (Chithunzi 2 (a)).Ntchito yosinthika komanso kusefa bandwidth ikuwonetsedwa mu Chithunzi 2 (b) ndi (c).Kuphatikiza apo, chipangizochi chimatha kuzindikira kusuntha kwa kuwala ndikulondola kwa sub-nanometer.

Chithunzi 2. Chithunzi chojambula cha sefa yowoneka bwino (a), magwiridwe antchito (b) ndi bandwidth yosefera (c)

WGM microfluidic drop resonator

mu microfluidic chip, makamaka kwa dontho mu mafuta (dontho mu-mafuta), chifukwa cha mawonekedwe a kugwedezeka pamwamba, chifukwa awiri a makumi kapena mazana ma microns, idzaimitsidwa mu mafuta, kupanga pafupifupi gawo langwiro.Kupyolera mu kukhathamiritsa kwa refractive index, droplet palokha ndi wangwiro ozungulira resonator ndi khalidwe chinthu choposa 108. Komanso amapewa vuto evaporation mu mafuta.Kwa madontho akuluakulu, "adzakhala" pamakoma apamwamba kapena otsika chifukwa cha kusiyana kwa kachulukidwe.Madontho amtundu wotere amatha kugwiritsa ntchito njira yotsatsira kumbuyo.