Photonic Crystal
zvigadzirwa

Photonic Crystal

26.05.2022 /

A photonic crystal chinhu chemazuva ano chinosanganisira alternately ekutanga masero ane yakakwirira uye yakaderera refractive index uye hukuru hunofananidzwa newavelength yechiedza kubva kune yakapihwa spectral renji. Phonic makristasi anoshandiswa mune optoelectronics. Zvinofungidzirwa kuti kushandiswa kwekrisiti yephotonic kuchabvumira, somuenzaniso. kudzora kupararira kwemwenje wave uye ichagadzira mikana yekusikwa kwemafotonic akabatanidzwa maseketi uye optical masisitimu, pamwe nenharembozha network ine yakakura bandwidth (yekurongeka kwePbps).

Mhedzisiro yechinhu ichi munzira yechiedza inofanana nemhedzisiro yegure pakufamba kwema electrons mune semiconductor crystal. Nokudaro zita rokuti "photonic crystal". Chimiro chephotonic crystal chinodzivirira kupararira kwemafungu echiedza mukati maro mune imwe nzvimbo yewavelengths. Ipapo iyo inonzi photon gap. Pfungwa yekugadzira photonic crystals yakagadzirwa panguva imwe chete muna 1987 munzvimbo mbiri dzeUS dzekutsvagisa.

Eli Jablonovich weBell Communications Research muNew Jersey akashanda pazvinhu zvephotonic transistors. Ipapo ndipo paakagadzira izwi rekuti "photonic bandgap". Panguva imwecheteyo, Sajiv John wePrieston University, achishanda kuti avandudze mashandiro emalaser anoshandiswa mukufambiswa kwemashoko, akawana gwanza rimwe chete. Muna 1991, Eli Yablonovich akagamuchira yekutanga photonic crystal. Muna 1997, nzira yakawanda yekuwana makristasi yakagadzirwa.

Muenzaniso weiyo inowanzoitika yetatu-dimensional photonic crystal ndeye opal, muenzaniso weiyo photonic layer yebapiro reshavishavi remhando yeMorpho. Nekudaro, makristasi ephotonic anowanzo kugadzirwa mumarabhoritari kubva kusilicon, iyo zvakare ine porous. Maererano nechimiro chavo, ivo vakakamurwa kuva one-, maviri- uye matatu-dimensional. Chimiro chakareruka ndeye-mwe-dimensional chimiro. Imwe-dimensional photonic crystals inonyatsozivikanwa uye yakashandiswa kwenguva refu dielectric layers, iyo inoratidzirwa ne-reflexion coefficient inoenderana newavelength yechiitiko chiedza. Muchokwadi, ichi chigirazi cheBragg, chine akawanda akaturikidzana ane alternating yakakwirira uye yakaderera refractive indices. Iyo Bragg girazi inoshanda senge yakajairika yakaderera pass sefa, mamwe ma frequency anoratidzwa nepo mamwe achipfuura. Kana iwe ukatenderedza Bragg girazi kuita chubhu, iwe unowana maviri-dimensional chimiro.

Mienzaniso yeartificially yakagadzirwa maviri-dimensional photonic crystals ndeye photonic optical fibers uye photonic layers, iyo, mushure mekugadzirisa kwakati wandei, inogona kushandiswa kushandura kutungamira kwechiratidzo chechiedza pazvinhambwe zvidiki pane zvakajairwa zvakabatanidzwa optics masisitimu. Parizvino pane nzira mbiri dzekuenzanisira photonic crystals.

первый - PWM (ndege wave nzira) inoreva one- uye maviri-dimensional zvimiro uye inoumbwa mukuverenga kwe theoretical equations, kusanganisira iyo Bloch, Faraday, Maxwell equations. Yechipiri Nzira yekuenzanisira zvimiro zvefiber optic inzira yeFDTD (Finite Difference Time Domain), iyo inosanganisira kugadzirisa maequation aMaxwell nekutsamira kwenguva kumunda wemagetsi uye magineti. Izvi zvinobvumira munhu kuita zviedzo zvenhamba pakuparadzira kwemafungu emagetsi mune zvakapihwa makristasi zvimiro. Mune ramangwana, izvi zvinofanirwa kuita kuti zvikwanise kuwana mafotonic masisitimu ane zviyero zvinofananidzwa neaya emagetsi emagetsi anoshandiswa kudzora mwenje.

Zvimwe zvinoshandiswa zvephotonic crystal:

  • Sarudza magirazi e laser resonators,
  • akagovera mhinduro lasers,
  • Photonic fibers (photonic crystal fiber), filaments uye planar,
  • Photonic semiconductors, ultra-white pigments,
  • Ma LED ane kuwedzera kushanda zvakanaka, Microresonator, Metamaterials - kuruboshwe zvinhu,
  • Broadband kuyedzwa kwemafotonic zvishandiso,
  • spectroscopy, interferometry kana optical coherence tomography (OCT) - kushandisa chikamu chakasimba chekuita.

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