Tsvagiridzo Itsva paLow-dimensional Avalanche Photodetector
High-sensitivity yekuona mashoma-photon kana kunyange single-photon tekinoroji inobata tarisiro yakakosha yekushandisa muminda senge yakaderera-mwenje imaging, kure sensing uye telemetry, pamwe nehuwandu hwekukurukurirana. Pakati pavo, avalanche photodetectors (APD) yave nzira yakakosha mumunda wekutsvaga kweoptoelectronic device nekuda kwehukuru hwavo hudiki, kushanda kwepamusoro uye nyore kubatanidzwa. Chiratidzo-kune-ruzha chiyero (SNR) chiratidzo chakakosha che APD Photodetector, iyo inoda kuwana yakakwirira uye yakaderera yakasviba ikozvino. Tsvagiridzo pambiri-dimensional (2D) zvinhu van der Waals heterojunctions inoratidza tarisiro yakafara mukugadzirwa kwepamusoro-kuita maAPD. Vatsvagiri kubva kuChina vakasarudza iyo bipolar maviri-dimensional semiconductor zvinhu WSe₂ seyakajeka zvinhu uye nekunyatsogadzira iyo Pt/WSe₂/Ni chimiro.APD Photodetectoriine yakanakisa yekufananidza basa basa rekugadzirisa iyo inherent kuwana ruzha dambudziko rechinyakare APD.
Vatsvakurudzi vakaronga imweAvalanche photodetectorzvichibva paPt/WSe₂/Ni chimiro, ichiwana kucherechedzwa kwakanyanya kwemasaini emwenje asina kusimba pafW pamwero wekamuri tembiricha. Vakasarudza maviri-dimensional semiconductor zvinhu WSe₂, ine yakanakisa magetsi emagetsi, uye akaisanganisa nePt 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.
Ichi chidzidzo chinoratidza basa rakakosha reinjiniya yemidziyo uye interface optimization mukusimudzira mashandiro ephotodetectors. Kuburikidza neungwaru dhizaini yema electrode uye maviri-dimensional zvinhu, kudzivirira mhedzisiro yerima vatakuri kwakagadziriswa, zvakanyanya kuderedza kupindira kweruzha uye kuwedzera kuvandudza kugona kwekuona. Kuita kweiyi detector hakungoratidzwi mune yayo photoelectric maitiro, asiwo ine yakakura tarisiro yekushandisa. Nekuvharika kwayo kunoshanda kwerima razvino patembiricha yekamuri uye kunyura kwakanaka kwemafotogenerated carriers, iyi photodetector inonyanya kukodzera kuona zviratidzo zvechiedza chisina simba muminda yakadai 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.
Nguva yekutumira: Aug-27-2025