AI 中文总结
该研究提出基于硅光子非冗余光学相控阵的成像方案，结合散斑式单像素成像，以127个天线实现超1万可分辨成像点，为紧凑OPA芯片实现百万像素成像提供了可行方向。
AI 中文摘要
光学相控阵（OPA）因体积紧凑、速度快，是成像应用中极具潜力的波前控制器件。但传统周期性OPA的空间分辨率有限，仅与光学天线数量N呈线性缩放关系。本文实验展示了基于非冗余OPA（NR-OPA）的高分辨率成像，由于其基于科斯塔斯阵列的非冗余天线布局，分辨率与N呈二次缩放关系。结合无需精确相位校准的散斑式单像素成像（SSPI）方案，本文利用仅含N=127的硅光子NR-OPA芯片，在不扫波长的情况下，实验实现了超过10000个可分辨成像点。该方案为用相移器数量更少的紧凑OPA芯片实现百万像素成像提供了可行途径。
英文摘要
Optical phased arrays (OPAs) are promising wavefront controlling devices for imaging applications due to their compact and high-speed nature. However, conventional periodic OPAs have a limited spatial resolution, which scales only linearly with the number of optical antennas $N$. Here, we experimentally demonstrate high-resolution imaging using a non-redundant OPA (NR-OPA). Due to the non-redundant antenna layout of NR-OPA based on the Costas array, the resolution scales quadratically with $N$. Combined with the speckle-based single-pixel imaging (SSPI) scheme, which avoids the need for precise phase calibration, we experimentally achieve a large number of resolvable imaging points exceeding 10,000 using a silicon photonic NR-OPA chip with only $N=127$ without sweeping the wavelength. The demonstrated scheme provides a promising route toward mega-pixel imaging by a compact OPA chip with reduced number of phase shifters.
Comments6 pages, 5 figures
