Bipolar maviri-dimensional avalanche photodetector

Bipolar maviri-dimensionalAvalanche photodetector

Iyo bipolar maviri-dimensional avalanche photodetector (APD photodetector) inowana ruzha rwepamusoro-pasi uye kuona kwekunzwa kwakanyanya

Kuonekwa kwepamusoro-soro kwemafotoni mashoma kana kunyange mafotoni ega kune zvakakosha zvekushandisa muminda senge isina kusimba chiedza imaging, kure kure sensing uye telemetry, uye quantum kutaurirana. Pakati pavo, iyo avalanche photodetector (APD) yave yakakosha kutungamira mumunda weoptoelectronic mudziyo tsvagiridzo nekuda kwehunhu hwayo hwehukuru hudiki, kushanda kwepamusoro uye nyore kubatanidza. Chiratidzo-kune-ruzha chiyero (SNR) chiratidzo chakakosha che APD photodetector, iyo inoda kuwana yakakwirira uye yakaderera yakasviba ikozvino. Tsvagiridzo yevan der Waals heterojunctions ye-two-dimensional (2D) zvinhu inoratidza tarisiro yakafara mukugadzirwa kwepamusoro-kushanda APDs. Vatsvagiri kubva kuChina vakasarudza bipolar maviri-dimensional semiconductor zvinhu WSe₂ seye photosensitive zvinhu uye zvine hungwaru akagadzirira APD photodetector ine Pt/WSe₂/Ni chimiro chine yakanyanya kuenderana basa basa, kuitira kugadzirisa iyo inherent yekuwana ruzha dambudziko rechinyakare APD photodetector.

Chikwata chekutsvagisa chakakurudzira avalanche photodetector yakavakirwa paPt/WSe₂/Ni chimiro, icho chakawana kucherechedzwa kwakanyanya kwemasaini asina kusimba emwenje pafW level pakamuri tembiricha. Vakasarudza maviri-dimensional semiconductor zvinhu WSe₂, ine yakanakisa magetsi emagetsi, uye yakasanganiswa Pt uye Ni electrode zvinhu kuti zvibudirire kugadzira mhando nyowani yeavalanche photodetector. Nekunyatso optimize basa rinoenderana pakati pePt, WSe₂ neNi, nzira yekufambisa yakagadzirwa iyo inogona kunyatso kuvharira vatakuri verima vachisarudzika ichibvumira vatakuri vemifananidzo kuti vapfuure. Iyi nzira inoderedza zvakanyanya ruzha rwunokonzerwa nemutakuri kukanganisa ionization, ichigonesa iyo photodetector kuti iwane yakanyanya kujeka yekuona chiratidzo chechiratidzo padanho rakaderera reruzha.

Zvadaro, kuitira kujekesa magadzirirwo ari shure kweavalanche effect yakakonzerwa nemunda usina simba wemagetsi, vatsvakurudzi vakatanga kuongorora kuenderana kwemabasa ekushanda kwesimbi dzakasiyana-siyana neWSe₂. Yakateedzana yesimbi-semiconductor-simbi (MSM) zvishandiso zvine akasiyana masimbi emagetsi akagadzirwa uye bvunzo dzakakodzera dzakaitwa pazviri. Uye zvakare, nekudzikisa kupararira kwemutakuri kusati kwatanga, kusarongeka kwekukanganisa ionization kunogona kudzikiswa, nekudaro kuderedza ruzha. Naizvozvo, bvunzo dzakakodzera dzakaitwa. Kuti uwedzere kuratidza hukuru hwePt/WSe₂/Ni APD maererano nemaitiro ekupindura nguva, vaongorori vakaongororazve -3 dB bandwidth yechishandiso pasi pemhando dzakasiyana dzekuwana magetsi.

Mhedzisiro yekuedza inoratidza kuti Pt/WSe₂/Ni detector inoratidza simba rakaderera rakaenzana neruzha (NEP) patembiricha yepakamuri, inongori 8.07 fW/√Hz. Izvi zvinoreva kuti detector inogona kuona isina kusimba masaini masaini. Pamusoro pezvo, chishandiso ichi chinogona kushanda zvakadzikama pachiyero chemodulation ye20 kHz nekuwana kwakakwira kwe5 × 10⁵, nekubudirira kugadzirisa bhodhoro rehunyanzvi hwechinyakare photovoltaic detectors izvo zvakaoma kuenzanisa kuwana kwepamusoro uye bandwidth. Ichi chimiro chinotarisirwa kuchipa zvakakosha mabhenefiti mumashandisirwo anoda kukwirisa uye ruzha rushoma.

Tsvagiridzo iyi inoratidza basa rakakosha reinjiniya yezvinhu uye interface optimization mukusimudzira mashandiro ephotodetectors. Kuburikidza neungwaru dhizaini yemagetsi uye maviri-dimensional zvinhu, kudzivirira mhedzisiro yerima vatakuri kwave kuwanikwa, kudzikisa zvakanyanya kukanganiswa kweruzha uye kuwedzera kuvandudza kugona kwekuona.

Kuita kweiyi detector hakungoratidzwi chete mumifananidzo yephotoelectric, asiwo ine tarisiro yakakura yekushandisa. Nekuvharira kwayo kunoshanda kwerima razvino patembiricha yekamuri uye kunyura kwakanaka kwemafotogenerated carriers, detector iyi inonyanya kukodzera kuona masaini asina simba emwenje munzvimbo dzakadai sekutarisa kwezvakatipoteredza, kuongorora nyeredzi, uye kutaurirana kwemaziso. Uku kubudirira kwekutsvagisa hakungope mazano matsva ekugadzirwa kweakaderera-dimensional material photodetectors, asi zvakare inopa mareferensi matsva ekutsvagisa kweramangwana nekuvandudza kwepamusoro-kuita uye yakaderera-simba optoelectronic zvishandiso.