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1. 发明申请

WO2022233842A1 BEAM-STEERING DEVICE AND METHOD FOR SPATIAL STEERING OF A LIGHT BEAM 审中-公开
公开(公告)号：WO2022233842A1
公开(公告)日：2022-11-10
申请号：PCT/EP2022/061802
申请日：2022-05-03
申请人： MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E. V. , UNIVERSITY OF TORONTO
发明人： MAK, Jason , JUNG, Youngho , SACHER, Wesley , POON, Joyce
IPC分类号： G02F1/295 , G02B6/12 , G02B6/34 , G01S7/481 , G01S17/42
摘要： A beam-steering device (100) for spatial steering of a light beam comprises a waveguide array (10) being arranged on a substrate (50) and comprising a waveguide array input (12), multiple waveguides (14-1, 14-2, …, 14-i) and a waveguide array output (16), wherein the multiple waveguides (14-1, 14-2, …, 14-i) are adapted for simultaneously guiding light from the waveguide array input (12) to the waveguide array output (16) and for forming a light beam downstream of the waveguide array output (16) by superimposing the light guided by the waveguides (14-1, 14-2, …, 14-i), a phase shifter device (18) being arranged for applying controlled phase shifts to the light guided in each of the waveguides (14-1, 14-2, …, 14-i), and a grating array (22) including at least one patterned grating in optical communication with the waveguide array output (16), the grating array (22) being configured to radiate the light beam out of the beam-steering device (100) to a surrounding, wherein the waveguide array output (16) is arranged such that the light beam is formed downstream of the waveguide array output (16) with a main lobe and side lobes and with a beam angle Φ in a plane of the substrate (50), that is determined by the controlled phase shifts applied to the light by the phase shifter device (18) and a wavelength of the light, a slab propagation region (20) is arranged between the waveguide array output (16) and the grating array (22) such that the main lobe of the light beam is angularly relayed to the grating array (22) and the side lobes of the light beam leave lateral sides of the slab propagation region (20) before reaching the grating array (22), and the grating array (22) is arranged to radiate the light beam out of the beam-steering device (100) with a first angular direction with respect to the substrate (50), that is determined by the beam angle Φ. Furthermore, a method of beam-steering a light beam is described.

2. 发明申请

WO2022238320A1 PHOTODETECTOR APPARATUS AND METHOD OF DETECTING LIGHT 审中-公开
公开(公告)号：WO2022238320A1
公开(公告)日：2022-11-17
申请号：PCT/EP2022/062468
申请日：2022-05-09
申请人： MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E. V. , UNIVERSITY OF TORONTO
发明人： LIN, Yiding , YONG, Zheng , MAK, Jason , SACHER, Wesley , POON, Joyce
IPC分类号： G02B6/12 , H01L31/105 , G02B2006/12123 , G02B6/12004
摘要： A photodetector apparatus (100), being configured for detecting light in the visible or infrared spectrum, comprises a substrate (30), a waveguide (20), a detector section (10), a first contact section (50) and a second contact section (52). The substrate (30) has a substrate surface (32) and a cladding layer (40). The waveguide (20) is arranged above the substrate surface (32) in the cladding layer (40) and is adapted for guiding light. The detector section (10) comprises a p-doped region (12, 14) and an ndoped region (16, 18), and the detector section (10') is arranged for producing charge carriers by the (10) light guided in the waveguide (20). The first contact section (50) is connected to the p-doped region (12, 14) and the second contact section (52) is connected to the n-doped region (16, 18), the first and second contact sections (50, 52) being connectable to a measuring device for measuring an electrical signal based on the charge carriers produced by the light. The waveguide (20) and the detector section (10) are spaced apart by a portion of the cladding layer (40) with a mutual distance such that optical power of the light guided in the waveguide( 20) can be gradually transferred from the waveguide (20) to the detector section (10). Furthermore, a method of detecting light in the visible or infrared spectrum is described.

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