Yintoni i-micro-nano photonics?

I-Micro-nano photonics ifunda ngokuyintloko umthetho wokusebenzisana phakathi kokukhanya kunye nomcimbi kwi-micro kunye ne-nano isikali kunye nokusetyenziswa kwayo kwisizukulwana sokukhanya, ukuhanjiswa, ukulawulwa, ukufumanisa kunye nokuziva. Izixhobo ze-Micro-nano photonics sub-wavelength zinokuphucula ngokufanelekileyo iqondo lokudityaniswa kwefoton, kwaye kulindeleke ukuba idibanise izixhobo zefotoni kwi-chip encinci ye-optical efana ne-electronic chips. I-plasmonics ye-Nano-surface yintsimi entsha ye-micro-nano photonics, eyona nto ifunda intsebenziswano phakathi kokukhanya kunye nomcimbi kwi-nanostructures yensimbi. Ineempawu zobukhulu obuncinci, isantya esiphezulu kunye nokunqoba umda we-diffraction yendabuko. Isakhiwo se-Nanoplasma-waveguide, esinokuphucula intsimi yendawo kunye neempawu zokucoca i-resonance, isiseko se-nano-filter, i-wavelength division multiplexer, i-optical switch, i-laser kunye nezinye izixhobo ze-micro-nano optical. I-Microcavities ye-Optical ivala ukukhanya kwimimandla emincinci kwaye iphucula kakhulu intsebenziswano phakathi kokukhanya kunye nomcimbi. Ke ngoko, i-optical microcavity enento ephezulu yomgangatho yindlela ebalulekileyo yokuziva nokuqonda okuphezulu.

WGM microcavity

Kwiminyaka yakutshanje, i-Optical microcavity itsale ingqalelo enkulu ngenxa yokusetyenziswa kwayo okukhulu kunye nokubaluleka kwesayensi. I-Optical microcavity ibandakanya i-microsphere, i-microcolumn, i-microring kunye nezinye iijometri. Luhlobo lwe-morphologic exhomekeke kwi-optical resonator. Amaza okukhanya kwii-microcavities aboniswa ngokupheleleyo kwi-interface ye-microcavity, ekhokelela kwimodi ye-resonance ebizwa ngokuba yi-whispering gallery mode (WGM). Xa kuthelekiswa namanye ama-resonator optical, i-microresonators ineempawu zexabiso eliphezulu le-Q (elikhulu kune-106), umthamo wemodi ephantsi, ubungakanani obuncinci kunye nokudibanisa okulula, njl., kwaye isetyenziswe kwi-high-sensitivity biochemical sensing, i-ultra-low threshold laser kunye isenzo esingenamgca. Injongo yethu yophando kukufumana kunye nokufunda iimpawu zezakhiwo ezahlukeneyo kunye ne-morphologies eyahlukeneyo ye-microcavities, kunye nokusebenzisa ezi mpawu ezintsha. Izikhokelo zophando eziphambili zibandakanya: uphando lweempawu ze-optical ze-WGM microcavity, uphando olwenziweyo lwe-microcavity, uphando lwesicelo se-microcavity, njl.

WGM microcavity biochemical sensing

Kuvavanyo, i-mode ye-WGM ene-odolo ephezulu ye-M1 (FIG. 1 (a)) yayisetyenziselwa ukulinganisa ukulinganisa. Xa kuthelekiswa nemodi ephantsi, uvakalelo lwemowudi ephezulu yaphuculwa kakhulu (FIG. 1 (b)).

Umzobo 1. Imo yeResonance (a) ye-microcapillary cavity kunye ne-refractive index sensitivity ehambelana nayo (b)

Isihluzi esibonakalayo esinexabiso eliphezulu le-Q

Okokuqala, i-radial etshintsha ngokucothayo i-cylindrical microcavity itsalwa ngaphandle, kwaye ke i-wavelength tuning inokufezekiswa ngokuhambisa ngomatshini indawo yokudibanisa ngokusekwe kumgaqo wobungakanani bemilo ukususela kwi-resonant wavelength (Figure 2 (a)). Ukusebenza okunokuqhutywa kunye nohluzo lwebhanwidth lubonisiwe kuMfanekiso 2 (b) no (c). Ukongeza, isixhobo sinokubona ukushukuma kwe-optical displacement ngokuchaneka kwe-sub-nanometer.

Umzobo 2. Umzobo ocwangcisiweyo wesihluzo esibonwayo esisetyenzwayo (a), ukusebenza okunokuqhutywa (b) kunye nobubanzi boluhlu lokucoca (c)

I-WGM microfluidic drop resonator

kwi-chip microfluidic, ngakumbi kwi-droplet kwi-oyile (i-droplet kwi-oyile), ngenxa yeempawu zokuxinana komphezulu, ngenxa yobubanzi bamashumi okanye amakhulu e-microns, iya kunqunyanyiswa kwioli, yenze phantse i-oyile. inqanaba eligqibeleleyo. Ngokusebenzisa ukulungiswa kwesalathisi se-refractive, i-droplet ngokwayo i-resonator epheleleyo ye-spherical kunye ne-quality factor engaphezulu kwe-108. Iphinde igweme ingxaki yokunyuka kwe-oyile. Ngamaconsi amakhulu, "baya kuhlala" kwiindonga ezingaphezulu okanye ezisezantsi ngenxa yokungafani kobuninzi. Olu hlobo lwe-droplet lunokusebenzisa kuphela imo ye-lateral excitation.