Yintoni i-micro-nano photonics?

Ii-Micro-nano photonics ikakhulu zifunda umthetho wokunxibelelana phakathi kokukhanya kunye ne-matter kwisikali se-micro kunye ne-nano kunye nokusetyenziswa kwayo ekuveliseni ukukhanya, ukudlulisa, ukulawula, ukufumanisa kunye nokuva. Izixhobo ze-Micro-nano photonics sub-wavelength zinokuphucula ngempumelelo inqanaba lokuhlanganiswa kwe-photon, kwaye kulindeleke ukuba zidibanise izixhobo ze-photonic kwi-chip encinci ye-optical njengee-chips ze-elektroniki. I-Nano-surface plasmonics yintsimi entsha ye-micro-nano photonics, efunda kakhulu ukusebenzisana phakathi kokukhanya kunye ne-matter kwizakhiwo ze-nano zesinyithi. Ineempawu zobukhulu obuncinci, isantya esiphezulu kunye nokugqithisa umda wendabuko we-diffraction. Isakhiwo se-Nanoplasma-waveguide, esineempawu ezilungileyo zokuphucula intsimi yendawo kunye nokucoca i-resonance, sisisiseko se-nano-filter, i-wavelength division multiplexer, i-optical switch, i-laser kunye nezinye izixhobo ze-micro-nano optical. Ii-optical microcavities zithintela ukukhanya kwiindawo ezincinci kwaye ziphucula kakhulu ukusebenzisana phakathi kokukhanya kunye ne-matter. Ke ngoko, i-optical microcavity ene-high quality factor yindlela ebalulekileyo yokubona nokufumanisa uvakalelo oluphezulu.

I-WGM microcavity

Kwiminyaka yakutshanje, i-optical microcavity itsale ingqalelo enkulu ngenxa yamandla ayo amakhulu okusetyenziswa kunye nokubaluleka kwesayensi. I-optical microcavity ikakhulu iqulathe i-microsphere, i-microcolumn, i-microring kunye nezinye iijiometri. Luhlobo lwe-morphologic dependent optical resonator. Amaza okukhanya kwii-microcavities abonakaliswa ngokupheleleyo kwi-interface ye-microcavity, nto leyo ebangela i-resonance mode ebizwa ngokuba yi-whispering gallery mode (WGM). Xa kuthelekiswa nezinye ii-optical resonators, ii-microresonators zineempawu zexabiso eliphezulu le-Q (elingaphezulu kwe-106), i-low mode volume, ubungakanani obuncinci kunye nokuhlanganiswa okulula, njl.njl., kwaye zisetyenziswe kwi-high-sensitivity biochemical sensitivity, i-ultra-low threshold laser kunye ne-nonlinear action. Injongo yethu yophando kukufumana nokufunda iimpawu zezakhiwo ezahlukeneyo kunye ne-morphology ezahlukeneyo zee-microcavities, kunye nokusebenzisa ezi mpawu zintsha. Imiyalelo ephambili yophando ibandakanya: uphando lweempawu ze-optical ze-WGM microcavity, uphando lokwenziwa kwe-microcavity, uphando lwesicelo se-microcavity, njl.njl.

Ukuqonda iikhemikhali ze-microcavity ze-WGM

Kolu vavanyo, imo ye-WGM ye-oda ephezulu ye-4-order M1 (Umfanekiso 1(a)) isetyenzisiwe ekulinganiseni ukuva. Xa kuthelekiswa nemo ye-oda ephantsi, uvakalelo lwemo ye-oda ephezulu luphuculwe kakhulu (Umfanekiso 1(b)).

Umfanekiso 1. Imo yeResonance (a) ye-microcapillary cavity kunye novakalelo lwayo lwe-refractive index oluhambelanayo (b)

Isihluzi se-optical esilungisekayo esinexabiso eliphezulu le-Q

Okokuqala, i-microcavity ye-cylindrical etshintsha kancinci iyatsalwa, kwaye emva koko ukulungiswa kwe-wavelength kunokufezekiswa ngokushukumisa ngoomatshini indawo yokudibanisa ngokusekelwe kumgaqo wobukhulu bemilo ukususela kwi-wavelength ye-resonant (Umfanekiso 2 (a)). Ukusebenza okuhlengahlengiswayo kunye ne-bandwidth yokucoca kuboniswe kuMfanekiso 2 (b) kunye no-(c). Ukongeza, isixhobo sinokubona ukuvaleka kwe-optical ngokuchaneka kwe-sub-nanometer.

Umfanekiso 2. Umzobo wesicwangciso sesihluzi se-optical esilungisekayo (a), ukusebenza okulungisekayo (b) kunye ne-bandwidth yesihluzi (c)

I-WGM microfluidic drop resonator

kwi-chip ye-microfluidic, ingakumbi kwi-droplet kwi-oyile (i-droplet in-oyile), ngenxa yeempawu zoxinzelelo lomphezulu, kububanzi bamashumi okanye amakhulu ee-microns, iya kuxhonywa kwi-oyile, yenze i-sphere ephantse yagqibelela. Ngokusebenzisa i-refractive index, i-droplet ngokwayo yi-spherical resonator egqibeleleyo ene-quality factor engaphezulu kwe-108. Ikwathintela ingxaki yokuphuma komoya kwi-oyile. Kwi-droplet enkulu, iya "kuhlala" kwiindonga eziphezulu okanye ezisezantsi ngenxa yokwahluka koxinano. Olu hlobo lwe-droplet lunokusebenzisa kuphela i-lateral excitation mode.