英文摘要：We propose and investigate a novel coherent laser array design based on laterally coupled photonic crystal surface-emitting lasers (PCSELs). As a new type of semiconductor laser technology, PCSELs have field confinement in a planar cavity and laser beam emission in the surface normal direction. By engineering lateral couplings between PCSELs with heterostructure photonic crystal designs, we can achieve coherent operations from an array of PCSELs. In this paper, we demonstrate coherent operation from a passively coupled PCSEL array design. We fabricated PCSEL array devices on a GaAs-based quantum well heterostructure at a target wavelength of 1040 nm. Experimental results show that the 2-by-2 PCSEL arrays have spectral linewidth of 0.14–0.22 nm. Beam combining performance was characterized by self-interference experiments. Similar coherency between the PCSEL array and single PCSEL device was observed. Our compact PCSEL array designs by passive lateral coupling have potential applications in fields of on-chip photonic computing, quantum, and information processing.

为什么与你有关：
为什么与你有关：
- 主线关联：直接服务 PCSEL 方向，优先看结构参数、耦合机制、出光/远场和验证口径。
- 可用线索：先看是否能抽出结构参数、指标定义或仿真设置。
- 可转化内容：适合沉淀成验证指标或参数先验，尤其是 quantum well。

论文链接

英文摘要：We report a novel coherent beam combining design with passively coupled PCSEL array. Experimental results of our fabricated GaAs-based arrays show high beam quality, linewidth, and coherency.

为什么与你有关：
为什么与你有关：
- 主线关联：直接服务 PCSEL 方向，优先看结构参数、耦合机制、出光/远场和验证口径。
- 可用线索：先看是否能抽出结构参数、指标定义或仿真设置。
- 可转化内容：先判断能否变成一个仿真 case、baseline、验证指标或参数先验。

论文链接

英文摘要：Photonic Crystal Surface-Emitting Lasers (PCSELs) are a new type of semiconductor laser design which features in-plane optical feedback from Photonic Crystal (PC) resonances. The lasing mode in a PCSEL cavity can be designed to operate at the Γ point of momentum space, and an upward emission with low beam divergence can be formed. Such orthogonal electrical injection and optical feedback design offers huge freedom of optical cavity design. On the one hand, high-power Continuous-Wave (CW) PCSELs with power exceeding 50W and brightness over 1GW cm−2 sr−1 have been demonstrated from a 3mm diameter single aperture PCSEL device. To support the development of this new type of semiconductor lasers, coupled electrical/optical designs are considered for high power single mode PCSELs. The impact of the optical lattice and suppression of higher order mode is critical in maintaining single mode operation for large aperture PCSELs. The incorporation of heterostructure photonic crystal cavities can lead to the control of in-plane cavity loss and the coupling of PCSEL arrays. Optimization of heterostructures will also be discussed for the optimal carrier injection and mode selection.

为什么与你有关：
为什么与你有关：
- 主线关联：直接服务 PCSEL 方向，优先看结构参数、耦合机制、出光/远场和验证口径。
- 可用线索：先看是否能抽出结构参数、指标定义或仿真设置。
- 可转化内容：先判断能否变成一个仿真 case、baseline、验证指标或参数先验。

论文链接

英文摘要：We demonstrate 29-W continuous-wave operation of a photonic-crystal surface-emitting laser with a double lattice structure and a circular resonator diameter of 2 mm. A very narrow divergence angle operation (<0.4°) has been successfully achieved even at 29 W of output power.

为什么与你有关：
为什么与你有关：
- 主线关联：直接服务 PCSEL 方向，优先看结构参数、耦合机制、出光/远场和验证口径。
- 可用线索：先看是否能抽出结构参数、指标定义或仿真设置。
- 可转化内容：先判断能否变成一个仿真 case、baseline、验证指标或参数先验。

论文链接

英文摘要：FDTD/FEM simulations, strengthened by machine learning, achieve 95.44% optical absorption efficiency in TiO 2 /TiN plasmonic nanocavities for solar energy harvesting.

为什么与你有关：
为什么与你有关：
- 主线关联：更偏nanocavity / FDTD / FEM，可作为 PCSEL 周边器件物理或数值方法补充。
- 可用线索：FDTD / FEM / AI 代理模型/逆向设计。
- 可转化内容：先判断能否变成一个仿真 case、baseline、验证指标或参数先验。

论文链接