Lub Teeb Pom Kev Thiab Ranging (LiDAR) yog qhov kev daws teeb meem tseem ceeb los muab cov khoom muaj txiaj ntsig zoo thiab muaj txiaj ntsig zoo rau kev kuaj pom thiab kev paub. Nyob rau hauv LiDAR system, lub teeb laser qhov chaw scans qhov chaw zoo yog lub hauv paus kom paub txog qhov radar nrhiav kom pom thiab paub txog kev ua haujlwm. Cov kev daws teeb meem kom paub txog beam scanning yog muab faib ua passive beam scanning thiab active beam scanning. Passive beam scanning muaj xws li semi-solid-state Micro-Electro-Mechanical System (MEMS) LIDAR, uas paub txog spatial beam scanning los ntawm txhua yam kev sib hloov, thiab tag nrho-solid-state Optical Phased Array (OPA), uas paub txog spatial beam scanning los ntawm kev hloov lub waveguide. (OPA), uas deflects lub beam thiab ua tiav txhua yam-dawb scanning los ntawm kev hloov cov geometry los yog refractive index faib ntawm lub waveguide. Tsis zoo li cov txheej txheem scanning uas twb muaj lawm xws li MEMS thiab OPA, active beam scanning (ABS) siv lub teeb pom kev zoo rau kev soj ntsuam, uas tuaj yeem txhim kho lub zog hloov pauv ntawm lub zog, ua kom lub zog tso zis thiab txo qhov nyuaj ntawm qhov chaw. .
Tsis ntev los no, ib pab neeg kawm ntawv Zheng Wanhua los ntawm lub koom haum ntawm Semiconductors, Suav Academy ntawm Sciences, ua ke nrog ib pab neeg ntawm Peking University lub Peng Chaojieqing, pom tau hais tias hluav taws xob txhaj active laser spatial beam scanning raws li ib tug Photonic Crystal Surface Emitting Laser (PCSEL). Cov qauv siv AlGaInAs quantum zoo raws li qhov nruab nrab qhov nruab nrab, thiab siv lub finite loj photonic siv lead ua kom quantize lub zog nruam bands rau hauv discrete hom, tau txais ntau hom kev txiav txim coj mus rau excitation ntawm txawv dispersion ces kaum nyob rau hauv lub deb-tsheb; ua ke nrog cov cab kuj hloov kho, cov qauv kev txiav txim sib txawv tau zoo siab nyob rau hauv cov kev txhaj tshuaj sib txawv, yog li paub txog kev siv lub tshuab luam ntawv. Cov hluav taws xob txhaj tshuaj PCSEL muab kev txhawb nqa rau 2D active laser chaw scanning radar.
Lub hauv paus tam sim no yog siv los tsav lub laser ntawm kev kub ceev kom paub beam scanning ntawm mus txog 1 MHz tus nqi, uas yog ib tug mus rau ob qhov kev txiav txim ntawm magnitude kev txhim kho nyob rau hauv scanning npaum li cas piv nrog cov tsoos MEMS tswvyim. Lub laser muaj peev xwm ua kom qhov ntsuas qhov sib npaug ntawm kev hnov, yoog raws, thiab txo hwj chim noj. Ntawm qhov tod tes, lub laser yog ib txoj hauv kev zoo tshaj plaws rau LIDAR, laser imaging, thiab laser sensing, thiab muab ib tug tshiab tswj mechanism rau active phased array radar; Ntawm qhov tod tes, nws cov yam ntxwv emissions saum npoo muaj qhov tshwj xeeb zoo hauv thaj chaw ntawm kev tshawb pom, kev sib koom ua ke ntawm photonic, thiab loj-scale arrays.
Cov txiaj ntsig, hu ua "Active Beam Steering Enabled by Photonic-Crystal Surface Emitting Laser", tau luam tawm thaum Lub Xya Hli 11 hauv American Chemical Society Nano (ACS Nano). -Nano (DOI: 10.1021/acsnano.3c09793). Mingjin Wang, tus kws tshawb fawb hluas ntawm Lub Tsev Haujlwm ntawm Semiconductors (ISS), thiab Feifan Wang, tus kws tshaj lij ntawm Peking University (Peking University), yog tus thawjcoj sau ntawv ntawm daim ntawv, thiab Wanhua Zheng, kws tshaj lij ntawm ISS, thiab Chao. Peng, tus xibfwb ntawm Peking University, yog cov kws sau ntawv sib koom ua ke.
Txoj haujlwm no tau txhawb nqa los ntawm National Key Research thiab Development Program ntawm Tuam Tshoj thiab National Natural Science Foundation ntawm Tuam Tshoj.
Fig. 1 PCSEL quantization ntawm nruam zog bands rau hauv discrete hom
Daim duab 2 High-speed beam scanning
