Iyini i-micro-nano photonics?

I-Micro-nano photonics ifunda ngokuyinhloko umthetho wokusebenzelana phakathi kokukhanya nodaba esikalini esincane kanye ne-nano kanye nokusebenza kwawo ekukhiqizeni ukukhanya, ukudlulisa, ukulawula, ukutholwa kanye nokuzwa. Amadivayisi we-Micro-nano photonics sub-wavelength angathuthukisa ngempumelelo izinga lokuhlanganiswa kwe-photon, futhi kulindeleke ukuthi ahlanganise amadivaysi e-photonic abe yi-chip encane yokubona njengama-electronic chips. I-Nano-surface plasmonics iyinkambu entsha ye-micro-nano photonics, efunda ikakhulukazi ukusebenzisana phakathi kokukhanya nodaba kuma-nanostructures ensimbi. Inezici zobukhulu obuncane, isivinini esikhulu kanye nokunqoba umkhawulo wendabuko we-diffraction. Isakhiwo se-Nanoplasma-waveguide, esinezici ezinhle zokuthuthukisa insimu yendawo kanye nezici zokuhlunga i-resonance, isisekelo se-nano-filter, i-wavelength division multiplexer, i-optical switch, i-laser namanye ama-micro-nano optical device. Ama-microcavities okubona ahlanganisa ukukhanya ezindaweni ezincane futhi athuthukisa kakhulu ukusebenzisana phakathi kokukhanya nezinto. Ngakho-ke, i-optical microcavity enesici sekhwalithi ephezulu iyindlela ebalulekile yokuzwela nokutholwa okuphezulu.

I-WGM microcavity

Eminyakeni yamuva nje, i-optical microcavity idonse ukunaka okukhulu ngenxa yamandla ayo amakhulu okusebenza nokubaluleka kwesayensi. I-Optical microcavity ikakhulukazi iqukethe i-microsphere, i-microcolumn, i-microring namanye ama-geometri. Iwuhlobo lwe-morphologic optical resonator encike. Amaza okukhanya kuma-microcavities abonakala ngokugcwele kusixhumi esibonakalayo se-microcavity, okuholela kumodi ye-resonance ebizwa nge-whispering gallery mode (WGM). Uma kuqhathaniswa namanye ama-optical resonator, ama-microresonator anezici zenani eliphakeme le-Q (elingaphezu kuka-106), ivolumu yemodi ephansi, usayizi omncane nokuhlanganiswa okulula, njll., futhi asetshenziswe ekuzweleni okukhulu kwe-biochemical, i-ultra-low threshold laser kanye isenzo esingaqondile. Inhloso yethu yocwaningo ukuthola nokufunda izici zezakhiwo ezahlukene kanye ne-morphology ehlukene yama-microcavities, nokusebenzisa lezi zici ezintsha. Izikhombisi-ndlela zocwaningo eziyinhloko zihlanganisa: ucwaningo lwezimpawu ezibonakalayo ze-WGM microcavity, ucwaningo lokwenziwa kwe-microcavity, ucwaningo lwesicelo se-microcavity, njll.

I-WGM microcavity biochemical sensing

Esivivinyweni, imodi ye-WGM ye-oda eliphezulu ezine-M1(FIG. 1(a)) isetshenziselwe ukulinganisa inzwa. Uma kuqhathaniswa nemodi ye-oda eliphansi, ukuzwela kwemodi ye-oda eliphezulu kwathuthukiswa kakhulu (FIG. 1 (b)).

Umfanekiso 1. Imodi ye-resonance (a) ye-microcapillary cavity kanye nokuzwela kwayo kwe-refractive index (b)

Isihlungi esibonakalayo esibonakalayo esinevelu engu-Q ephezulu

Okokuqala, i-radial eshintsha kancane kancane i-cylindrical microcavity ikhishwa, bese ukushuna kwe-wavelength kungafinyelelwa ngokuhambisa ngomshini indawo yokuhlanganisa ngokusekelwe kumgomo wosayizi womumo kusukela kubude beza beza obuzwakalayo (Umfanekiso 2 (a)). Ukusebenza okuguqulekayo kanye nomkhawulokudonsa wokuhlunga kukhonjisiwe kuMfanekiso 2 (b) no (c). Ngaphezu kwalokho, idivayisi ingakwazi ukubona inzwa yokususwa kwendawo ngokunemba kwe-sub-nanometer.

Umfanekiso 2. Umdwebo oyisikimu wesihlungi esibonakalayo esiguqulekayo (a), ukusebenza okufundekayo (b) kanye nomkhawulokudonsa wesihlungi (c)

I-WGM microfluidic drop resonator

ku-chip microfluidic, ikakhulukazi i-droplet emafutheni (i-droplet in-oil), ngenxa yezimpawu zokungezwani kwendawo, ububanzi bamashumi noma amakhulu ama-microns, izomiswa emafutheni, yenze cishe i-sphere ephelele. Ngokusebenzisa kahle inkomba ye-refractive, i-droplet ngokwayo iyi-resonator ephelele eyindilinga enesici sekhwalithi esingaphezu kuka-108. Iphinde igweme inkinga yokuhwamuka emafutheni. Ngamaconsi amakhulu, "azohlala" ezindongeni ezingaphezulu noma ezingezansi ngenxa yokuhluka kobuningi. Lolu hlobo lwamaconsi lungasebenzisa kuphela imodi ye-lateral excitation.