2026-07-28

OpenAlex · Laser & Photonics Review · 2026-07-23 · Tong Xu, Meixin Feng, Rui Xi, Xiaoqi Yu · 新论文 2026-07-26 · 相关度 33.1

英文原题3.2 W GaN‐Based Photonic‐Crystal Surface‐Emitting Laser

中文摘要摘要：光子晶体面发射激光器（PCSEL）凭借其单模运行和窄光束发散角等独特能力，已成为激光雷达、自由空间通信和材料加工等高功率、高亮度应用中极具前景的光源。然而，将 PCSEL 拓展至蓝光波段仍面临挑战，主要原因是 GaN 基材料的低折射率和短波长削弱了光反馈，并增加了制造难度和光散射损耗，从而导致极高的激光阈值。在本研究中，我们展示了在 GaN 衬底上采用优化的外延结构和光子晶体设计制造的、工作波长为 430.5 nm 的无再生长瓦级 GaN 基 PCSEL。该器件实现了 4 kA/cm² 的阈值电流密度，并在室温下获得了 3.2 W 的峰值输出功率；据我们所知，这是迄今报道的最高输出功率。本研究为采用简化制造工艺实现高功率可见光 PCSEL 提供了一条可行路径，在未来的高亮度照明和显示应用中具有巨大潜力。

英文摘要ABSTRACT Photonic‐crystal surface‐emitting lasers (PCSELs) have emerged as promising light sources for high‐power, high‐brightness applications such as LiDAR, free‐space communication, and material processing, owing to their unique capabilities for single‐mode operation and narrow beam divergence. However, extending PCSELs into the blue wavelength regime remains challenging, primarily due to the low refractive index and short wavelength of GaN‐based materials, which weakens optical feedback and increases the fabrication difficulty and optical scattering loss, resulting in very high lasing thresholds. In this work, we demonstrate regrowth‐free, watt‐class GaN‐based PCSELs operating at 430.5 nm, fabricated on GaN substrates using an optimized epitaxial structure and photonic crystal design. The device achieved a threshold current density of 4 kA/cm 2, and a peak output power of 3.2 W at room temperature, which, to our knowledge, is the highest output power reported. This work provides a viable pathway toward high‐power visible PCSELs with simplified fabrication processes, offering significant potential for high‐brightness lighting and display applications in the future.

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OpenAlex · IEEE Journal of Selected Topics in Quantum Electronics · 2026-06-15 · Takuya Inoue, Masahiro Yoshida, Kenji Ishizaki, Menaka De Zoysa · 新论文 2026-07-22 · 相关度 16.8

英文原题Carrier-Induced Mode Redistribution Enabling Scalable Single-Mode Lasing in Ultra-Large-Area Photonic-Crystal Surface-Emitting Lasers

中文摘要光子晶体面发射激光器（PCSEL）凭借其在超大发射面积上实现相干激光振荡的能力，正作为面向多种应用的下一代高功率光源而受到关注。为了使超大面积 PCSEL 在远高于激光阈值时仍能保持稳定的单模激光振荡，有必要理解振荡模式如何通过载流子与光子之间的相互作用在时间和空间上演化。本文在考虑载流子–光子相互作用的情况下，对超大面积（3～10 mm）PCSEL 的激光振荡特性进行了全面的数值分析，并重点研究即使在高电流注入条件下仍能在超大面积上实现单模振荡的物理机制。我们揭示，由于载流子诱导的折射率变化及其产生的弱模式间隙效应，大面积 PCSEL 内部集中于增益区中心的初始单峰光子分布会自发改变。当激光振荡发生在具有适当能带曲率的带边模式时，随着注入电流增加，光子分布会变得愈加均匀，并趋近于注入电流的分布。这种模式重分布（或离域化）抑制了空间烧孔效应，有利于即使在高电流注入条件下也维持单模振荡。此外，通过调整器件内部的注入电流分布，我们可以灵活改变发射轮廓，例如形成类高斯分布。我们的研究结果加深了对超大面积单模 PCSEL 激光振荡特性的理解，并为未来通过实验展示 kW 级单模振荡提供了重要指导。

英文摘要Photonic-crystal surface-emitting lasers (PCSELs) are attracting attention as next-generation high-power light sources for a variety of applications owing to their capability for coherent lasing oscillation over ultra-large emission areas. To maintain stable single-mode lasing in ultra-large-area PCSELs far above the lasing threshold, it is essential to understand how the oscillation modes evolve in time and space via the interaction between carriers and photons. In this paper, we perform a comprehensive numerical analysis of the lasing characteristics of ultra-large-area (3∼10-mm) PCSELs considering carrier-photon interactions, focusing specifically on the physics that allows single mode oscillation over an ultra-large area even under high current injection. We reveal that, owing to carrier-induced refractive index changes and the resultant weak mode-gap effect, the initial unimodal photon distributions concentrated at the center of the gain region inside large-area PCSELs are spontaneously altered. When lasing oscillation occurs at a band-edge mode with an appropriate band curvature, the photon distribution becomes increasingly uniform as the injection current increases, resembling the distribution of the injection current. Such mode redistribution (or delocalization) suppresses spatial hole burning and is advantageous for maintaining single-mode oscillation even at high current injection. In addition, by tailoring the injection current distribution inside the device, we can flexibly change the emission profile to, for example, Gaussian-like distributions. Our findings provide deeper insight into the lasing characteristics of ultra-large-area single-mode PCSELs, and offer an important guideline for the experimental demonstration of kW-class single mode oscillation in the future.

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OpenAlex · AIP Advances · 2026-05-01 · A. Bisianov, A. Waag · 新论文 2026-06-09 · 相关度 21.1

英文原题A synergistic approach to optical modeling of PCSELs through rigorous methods and the coupled-wave theory

中文摘要针对光子晶体面发射激光器（PCSEL）的光学建模，人们已经开发了多种数值和半解析方法。然而，用于比较这些方法的预测能力并确定其各自适用范围的系统框架，在很大程度上仍未得到探索。在本研究中，我们提出了一种比较方法，将包括严格数值方法和基于有效折射率的方法在内的四种代表性方法置于耦合波理论框架中进行分析和部分混合。以单晶格和双晶格 PCSEL 为代表性模型，我们证明，该方法不仅揭示了严格方法与耦合波理论框架预测结果之间的根本差异，还能够捕捉与激光运行相关的连续体束缚态的泄漏相和对称性破缺相。

英文摘要A wide range of numerical and semi-analytical approaches has been developed for optical modeling of photonic-crystal surface-emitting lasers (PCSELs). However, a systematic framework for comparing their predictive capabilities and identifying their respective validity limits remains largely unexplored. In this study, we introduce a comparative methodology in which four representative methods—including rigorous numerical and effective-index-based approaches—are analyzed and partially hybridized within a coupled-wave-theory framework. Using single- and double-lattice PCSELs as representative models, we demonstrate that this approach not only reveals fundamental differences between predictions of rigorous methods and the coupled-wave-theory framework but also captures leaky and symmetry-broken phases of bound states in the continuum relevant for laser operation.

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为什么与你有关：
- 主线关联：更偏photonics / photonic crystal / CWT，可作为 PCSEL 周边器件物理或数值方法补充。
- 可用线索：CWT。
- 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。

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OpenAlex · IEEE Journal of Selected Topics in Quantum Electronics · 2026-06-15 · Shota Koga, Takuya Inoue, Menaka De Zoysa, Susumu Noda · 新论文 2026-07-09 · 相关度 25.9

英文原题Three-Dimensional Coupled-Wave Analysis for Photonic-Crystal Surface-Emitting Lasers With External Optical Feedback

中文摘要光子晶体面发射激光器（PCSEL）通过引入光子晶体谐振器实现大面积相干振荡，从而获得高输出功率和优异的光束质量。光子晶体设计的进展带来了包括光束转向、高速调制和窄线宽运行在内的增强功能。作为进一步拓展 PCSEL 功能的一种有前景的方法，本文考虑了由外部反射器引起的自注入光反馈；此前已有研究报道，该方法可用于传统半导体激光器，以实现线宽压窄和调制带宽扩展。本文建立了一种能够分析具有外部光反馈的 PCSEL 的数值方法，并基于该框架对其激光振荡特性进行了理论研究。首先，我们表明，激光模式通过光子晶体内部的大面积横向谐振模式与外部反射器引入的纵向法布里–珀罗模式之间的耦合而形成，同时保持具有窄发散角的单横模运行。我们还揭示，通过调节反馈强度和延迟时间可以实现单纵模运行，并且通过控制反射相位还可以实现频率扫描运行。这些结果表明，外部光反馈可为实现 PCSEL 的先进功能提供一种有效途径。

英文摘要Photonic-crystal surface-emitting lasers (PCSELs) enable large-area coherent oscillation by incorporating a photonic crystal resonator, thereby realizing high output power and excel lent beam quality. Advances in photonic-crystal design have led to enhanced functionalities, including beam steering, high-speed modulation, and narrow-linewidth operation. As a promising approach to further extending the functionality of PCSELs, self-injection optical feedback induced by an external reflector, which has been previously reported in conventional semiconductor lasers to achieve linewidth narrowing and expansion of the modulation bandwidth, is considered. In this paper, we develop a numerical method that enables the analysis of PCSELs with external optical feedback, and we conduct a theoretical investigation on its lasing characteristics based on this framework. First, we show that the lasing modes are formed through the coupling between the large area transverse resonant modes inside the photonic crystal and the longitudinal Fabry–Pérot modes introduced by the external reflector, while maintaining single-transverse-mode operation with a narrow divergence angle. We also reveal that single-longitudinal mode operation can be achieved by adjusting the feedback strength and the delay time, where frequency sweep operation can be also realized by controlling the reflection phase. These results suggest that external optical feedback can provide an effective approach for realizing advanced functionality of PCSELs.

为什么与你有关
为什么与你有关：
- 主线关联：更偏photonics / photonic crystal / CWT，可作为 PCSEL 周边器件物理或数值方法补充。
- 可用线索：CWT。
- 可转化内容：适合沉淀成验证指标或参数先验，尤其是 divergence angle。

今日必看：优先判断是否进入 PCSEL / CWT / 仿真建模文献库。

OpenAlex · Optics Express · 2026-06-01 · Qingyuan Zhang, Ming Lyu, Jiang Hu, Qi Dai · 新论文 2026-06-13 · 相关度 25.0

英文原题Size scaling law for radiation losses of modes in photonic crystal surface emitting devices

中文摘要光子晶体面发射激光器（PCSEL）因能够产生超高功率、低发散角的激光束而受到广泛关注。这是因为它们支持高功率单模激光振荡，其模式体积比传统半导体激光器大数个数量级。PCSEL 的有限横向尺寸是限制其激光模式体积并进而限制其输出功率的主要因素。我们证明，总腔损耗 α = α⊥ + α∥ 与器件尺寸 L 之间的缩放关系为：表面辐射损耗按照 α⊥ ∼ O(L⁻²) 缩放，而边缘辐射损耗按照 α∥ ∼ O(L⁻³) 缩放。这两种缩放关系均可通过能带图复频率 ω(k) 的二阶展开来解释。我们的结果为设计大面积类 PCSEL 器件时估算尺寸效应提供了指导。

英文摘要Photonic-crystal surface-emitting lasers (PCSELs) have garnered significant attention due to their ability to generate laser beams with ultra-high power and low divergence. This is because they support high-power single-mode lasing with volumes orders of magnitude larger than those of conventional semiconductor lasers. The finite lateral size in a PCSEL is a primary factor limiting its lasing mode volume and, consequently, its output power. We demonstrate that the scaling relation between the total cavity loss α = α ⊥ + α ∥ and the device size L is such that the surface radiation loss scales as α ⊥ ∼ O ( L −2 ), while the edge radiation loss α ∥ ∼ O ( L −3 ). Both scaling relations can be explained by the second-order expansions of the complex frequency ω ( k ) of the band diagram. Our results provide a guideline for estimating the size effect when designing large-area PCSEL-like devices.

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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 mode volume。

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OpenAlex · Applied Physics Letters · 2026-07-06 · Erin Raftery, Devon O. Lee, Daniel W. Pflug, Adrian Birge · 新论文 2026-07-09 · 相关度 33.0

英文原题Buried dielectric quasi-photonic-crystal surface-emitting lasers

中文摘要我们报道了一种准光子晶体面发射激光器（QPCSEL），其采用由高折射率外延半导体包围的亚微米低折射率埋入式介电结构来形成准光子晶体层。我们展示了埋入式介电 QPCSEL 在室温下、发射波长为 1.5 μm 的光泵浦激光振荡。QPCSEL 以准周期光子晶体取代传统的周期性折射率图案，从而产生单模发射。我们的埋入式介电方案能够实现光子晶体的固态集成，同时在半导体外延再生长过程中保持复杂的图案化几何结构。

英文摘要We report a quasi-photonic-crystal surface-emitting laser (QPCSEL) that employs sub-micron, low-index buried dielectric features surrounded by high-index epitaxial semiconductor to form the quasi-photonic-crystal layer. We demonstrate photopumped lasing from a buried dielectric QPCSEL at room temperature with emission wavelength at 1.5 μm. QPCSELs replace the conventional periodic refractive index pattern with a quasi-periodic photonic crystal, which produces single mode emission. Our buried dielectric approach enables solid-state integration of the photonic crystal while preserving the complex patterned geometry during epitaxial semiconductor regrowth.

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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。

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OpenAlex · Light Science & Applications · 2026-06-23 · Yifan Li, Wei Guo, Zihang Cui, Guozhen Liang · 新论文 2026-07-03 · 相关度 15.8

英文原题High-purity linearly polarized emission from a compact BIC laser

中文摘要连续体束缚态（BIC）赋予光子晶体（PhC）激光器超高品质因子，从而使其能够实现低阈值。然而，BIC 具有动量空间矢量偏振涡旋，这对实现高纯度偏振发射构成了重大障碍。传统上，可以通过各种对称性扰动来控制 PhC 激光器的偏振。然而，由于实际激光系统固有的有限尺寸效应，其发射的偏振纯度较低。因此，在不显著牺牲其他性能指标的情况下实现 PhC 激光器发射的高偏振纯度，一直是一项长期存在的挑战。在此，我们提出了一种色散辅助偏振控制策略，用于对 PhC 激光器发射进行单片式偏振工程。作为概念验证，我们展示了一种紧凑型准 BIC 激光器的线偏振发射，其偏振消光比高达约 300:1，同时保持了单模运行和高光束质量。我们的工作为片上激光器的高效偏振调控开辟了道路。所得器件可为相干光通信、先进显示技术和多种精密测量应用提供微型化偏振光源。

英文摘要Bound states in the continuum (BICs) confer ultrahigh quality factors and, thus, enable low thresholds upon photonic crystal (PhC) lasers. However, BICs feature a momentum-space vectorial polarization vortex, posing a substantial obstacle in achieving high-purity polarized emission. Traditionally, polarization control of a PhC laser can be achieved through various symmetry perturbations. However, the emission suffers from low polarization purity due to the finite-size effect inherent in real laser systems. Achieving a high polarization purity in PhC laser emission without significantly sacrificing other performance metrics has thus been a persistent challenge. Here, we develop a dispersion-assisted polarization control strategy for monolithic polarization engineering of PhC laser emission. As a proof of concept, we have demonstrated a linearly-polarized emission from a compact quasi-BIC laser with a high polarization extinction ratio of ~300:1, while single-mode operation and high beam quality are well-maintained. Our work paves a way for efficient polarization tailoring of on-chip lasers. The resulting devices deliver a miniaturized polarization light source for applications across coherent optical communication, advanced display technology, and diverse precision measurements.

为什么与你有关
为什么与你有关：
- 主线关联：更偏photonics / photonic crystal，可作为 PCSEL 周边器件物理或数值方法补充。
- 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。

今日必看：优先判断是否进入 PCSEL / CWT / 仿真建模文献库。

OpenAlex · Applied Physics Letters · 2026-06-15 · Zhiwei Sun, Bolin Zhou, Yuzhen Zheng, Yongchen Miao · 新论文 2026-06-19 · 相关度 40.0

英文原题Regrowth-free blue GaN-based photonic crystal surface-emitting lasers with triangular air holes

中文摘要我们报道了采用无再生长方法制造的室温蓝光 GaN 光子晶体面发射激光器（PCSEL）二极管的成功实现。通过采用具有改进型三角形空气孔的方形晶格光子晶体结构，我们实现了稳健的二维单模激光振荡。该器件的阈值电流密度为 5.2 kA/cm²，并发射高斯形光束，其光束发散角极低，测得为 1.15 mrad（0.066°）。此外，三角形空气孔的对称性破缺特性使器件产生了垂直于三角形长边的稳定线偏振。本研究表明，采用具有简单孔洞几何结构的无再生长制造工艺可以实现高光束质量的蓝光 PCSEL，为高性能蓝光激光源铺平了道路。

英文摘要We report the successful realization of a room-temperature blue GaN photonic crystal surface-emitting laser (PCSEL) diode fabricated using a regrowth-free approach. By employing a square lattice photonic crystal structure with modified triangular air holes, we achieve robust two-dimensional single-mode lasing. The device operates with a threshold current density of 5.2 kA/cm2 and emits a Gaussian-shaped beam with exceptionally low beam divergence, measured at 1.15 mrad (0.066°). Furthermore, the symmetry-breaking nature of the triangular air holes enforces a stable linear polarization perpendicular to the long edge of the triangle. This work demonstrates that high-beam-quality blue PCSELs can be achieved using non-regrowth fabrication processes with simple hole geometry, paving the way for high-performance blue laser sources.

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。

今日必看：优先判断是否进入 PCSEL / CWT / 仿真建模文献库。