Optics letters最新文献_第5页

All-dielectric double near-perfect absorptions and optical switchings in a permittivity-asymmetric multiple-qBIC-driven metasurface. 介电常数非对称多qbic驱动超表面的全介电双近乎完美吸收和光开关。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572463

Yiping Xu, Shurui Fei, Tian Guo, Qiuchen Wu, Jun Wu, Zhendong Yan

{"title":"All-dielectric double near-perfect absorptions and optical switchings in a permittivity-asymmetric multiple-qBIC-driven metasurface.","authors":"Yiping Xu, Shurui Fei, Tian Guo, Qiuchen Wu, Jun Wu, Zhendong Yan","doi":"10.1364/OL.572463","DOIUrl":"https://doi.org/10.1364/OL.572463","url":null,"abstract":"We propose a tunable all-dielectric permittivity-asymmetric metasurface capable of supporting dual high-quality (Q) qBIC modes, leading to double near-perfect absorptions (PAs). By breaking the permittivity tensor symmetry through the magneto-optical (MO) effect, electric quadrupole modes-dominated double qBICs are excited. The high-reflection background toroidal dipole mode suppresses radiative loss in transmission, enabling the metasurface to surpass the 50% absorption limit and achieve double high-Q near-PAs of 88.08% and 96.12% at 1448.3 nm and 1457.9 nm under critical coupling condition, with highQ-factors up to 8.7 × 103 and 1.2 × 104, respectively. The proposed all-dielectric MO metasurface exhibits robust near-PAs against variations in geometrical parameters. Moreover, by dual MO and polarization angle of incident light control, the double qBICs exhibit high-performance optical switchings with a maximum modulation depth of 100% and the corresponding ON/OFF ratio exceeding 39 dB, demonstrating their potential for ultra-efficient light manipulation.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6085-6088"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous RF self-interference cancellation and high-frequency wideband instantaneous reception using optical frequency comb-based optical undersampling. 利用基于光频梳的光欠采样实现射频自干扰消除和高频宽带瞬时接收。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.575187

Rongguang Feng, Meiling Yang, Yumo Tian, Yuhang Song, Shuguo Xie, Yan Yang

{"title":"Simultaneous RF self-interference cancellation and high-frequency wideband instantaneous reception using optical frequency comb-based optical undersampling.","authors":"Rongguang Feng, Meiling Yang, Yumo Tian, Yuhang Song, Shuguo Xie, Yan Yang","doi":"10.1364/OL.575187","DOIUrl":"https://doi.org/10.1364/OL.575187","url":null,"abstract":"Continuous-wave (CW) carrier-based radio-frequency self-interference cancellation (RF SIC) is key to in-band full-duplex (IBFD) technology, but it cannot achieve instantaneous reception of high-frequency wideband signals. This Letter proposes an optical frequency comb (OFC)-based undersampling for wideband RF SIC and reception, which significantly enhances signal reception capabilities across ultra-wide bandwidths. To address the cancellation failures caused by misaligned optical pulse phases in OFC-based reception links, this study proposes, for the first time to the best of our knowledge, an optical path matching criterion. This extends the conventional RF SIC theory, originally developed for CW carriers, to the OFC-based reception. The new cancellation criterion is applicable to both CW- and OFC-based reception systems. Based on the proposed criterion, we designed an innovative and ingenious wavelength-division multiplexing common-path transmission architecture that effectively satisfies both the optical path matching condition and the conventional electrical path matching requirement without introducing errors. The experimental results validated the effectiveness of the proposed method. Within the 48 MHz to 9.98 GHz frequency band, the achieved RF SIC depths were at least 41.5 dB for single-tone signals and exceeded 26 dB for QPSK-modulated interference signals with a symbol rate of 60 Msps/s. The constellation diagram of the SOI (signal of interest) is successfully recovered, with an error vector magnitude (EVM) below 16.8%, meeting the 3GPP international standard requirements for QPSK signals.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6165-6168"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constructing low-efficiency roll-off InP-based QLEDs by enhancing hole injection and suppressing electron leakage. 通过增强空穴注入和抑制电子泄漏构建低效率滚落inp基qled。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.570975

Jiaming Li, Qiuyan Li, Hui Wang, Jialong Zhao, Jin Wang, Xi Yuan

{"title":"Constructing low-efficiency roll-off InP-based QLEDs by enhancing hole injection and suppressing electron leakage.","authors":"Jiaming Li, Qiuyan Li, Hui Wang, Jialong Zhao, Jin Wang, Xi Yuan","doi":"10.1364/OL.570975","DOIUrl":"https://doi.org/10.1364/OL.570975","url":null,"abstract":"Indium phosphide (InP)-based quantum dot light-emitting diodes (QLEDs) have attracted considerable attention due to their excellent color purity and high external quantum efficiency (EQE). However, InP-based QLEDs exhibit severe efficiency roll-off, which limits their applications in high-brightness devices. In this Letter, we demonstrate low-efficiency roll-off red InP-based QLEDs by employing an ionic salt-doped poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) as the hole injection layer (HIL), in combination with poly(9-vinylcarbazole) (PVK) as the hole transport layer. The work function and conductivity of PEDOT:PSS HIL were effectively modulated by introducing ionic liquids, while the electron leakage of QLEDs was suppressed by PVK with a shallower lowest occupied molecular orbital level by constructing a stepped hole transport layer, thereby achieving improved charge balance within the device. As a result, the parasitic emission of the device was suppressed, and the EQE was improved from 10.2% to 15.6%, especially at 100 mA cm-2. Notably, the efficiency roll-off was effectively reduced to only 11% relative to the peak EQE. The structural engineering of devices significantly enhances the potential of QLEDs to operate efficiently at high luminance.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6185-6188"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Femtosecond laser-induced C_SiV_C color centers on the surface of N-doped 4H-SiC. 飞秒激光诱导的氮掺杂4H-SiC表面的CSiVC色心。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.574649

Xiaoyu Sun, Xuhu Han, Haochen Wang, Haojie Zheng, Qiannan Jia, Lei Zhang, Xinyu Sun, Chen Chen, Xiaoguo Fang, Liping Shi, Fengjiang Liu, Dongli Liu, Zhiqi Zhang, Yu Xie, Lijing Zhong, Wei Yan, Jianrong Qiu, Min Qiu

{"title":"Femtosecond laser-induced CSiVC color centers on the surface of N-doped 4H-SiC.","authors":"Xiaoyu Sun, Xuhu Han, Haochen Wang, Haojie Zheng, Qiannan Jia, Lei Zhang, Xinyu Sun, Chen Chen, Xiaoguo Fang, Liping Shi, Fengjiang Liu, Dongli Liu, Zhiqi Zhang, Yu Xie, Lijing Zhong, Wei Yan, Jianrong Qiu, Min Qiu","doi":"10.1364/OL.574649","DOIUrl":"https://doi.org/10.1364/OL.574649","url":null,"abstract":"Color center ensembles-light-emitting defects in silicon carbide (SiC) have emerged as exceptional quantum emitters. Femtosecond (fs) laser processing provides a practical solution for their fabrication. While SiC color centers encompass various types, former research mostly focused on fs-laser-induced silicon-vacancy (VSi) centers, leaving other types of centers less investigated. Here, we demonstrate the fabrication of carbon anti-site vacancy (CSiVC) centers on the surface of nitrogen-doped 4H-SiC using fs laser processing. Room-temperature and 1.8 K low-temperature photoluminescence tests provide evidence that the visible fluorescence originates from CSiVC centers. By correlating laser parameters with fluorescence spectrum, we show that single-pulse processing at energies above 400 nJ induces apparent dual emission bands peaked at 675 nm (CSiVC) and 900 nm (VSi) due to the simultaneous presence of the CSiVC and VSi centers in the processed region, while multi-pulse irradiation promotes the generation of CSiVC but causes severe damage to the substrate crystal structure. We further demonstrate the spatial patterning of color center ensembles. This work provides new, to our knowledge, insights into the engineering of fs-laser-induced color centers in SiC.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"5981-5984"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dipole-quadrupole hybrid metasurface for broadband surface-enhanced infrared spectroscopy. 宽带表面增强红外光谱的偶极-四极混合超表面。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572909

Chen Chen, Wenbo Huang, Hailong Jiang, Feng Chen, Lei Wang, Ronger Lu

{"title":"Dipole-quadrupole hybrid metasurface for broadband surface-enhanced infrared spectroscopy.","authors":"Chen Chen, Wenbo Huang, Hailong Jiang, Feng Chen, Lei Wang, Ronger Lu","doi":"10.1364/OL.572909","DOIUrl":"https://doi.org/10.1364/OL.572909","url":null,"abstract":"The identification of molecules constitutes a fundamental challenge in chemical sensing applications. Surface-enhanced infrared absorption spectroscopy (SEIRA), serving as a complementary technique to surface-enhanced Raman scattering spectroscopy (SERS), is widely employed for molecule identification by resolving characteristic absorption fingerprints. While commonly used nanorods support strong dipole plasmons, their narrow spectral response limits coverage of the broadband molecular fingerprint region. In this Letter, we report a tetra-band metasurface absorber that simultaneously supports both dipole and quadrupole plasmonic modes. This unique configuration generates four distinct absorption bands with uniform resonance strengths across the mid-infrared spectral range. Simulations confirm that the four resonance modes exhibit spatially overlapping \"hot spots\" at the designed nanogap, guaranteeing that multiband SEIRA enhancements probe the very same molecules. Multiple vibrational bands of PMMA and CO2 served as spectroscopic probes to characterize the enhancement abilities of the four resonance modes.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6129-6132"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control of the threshold of the hard excitation mode of an optomechanical system by a low-intensity seed wave. 用低强度种子波控制光机械系统的硬激励模式阈值。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.571381

Artem R Mukhamedyanov, Evgeny S Andrianov, Alexander A Zyablovsky

引用次数: 0

Curvature-adaptive gigapixel microscopy at submicron resolution and centimeter scale. 曲率自适应十亿像素显微镜在亚微米分辨率和厘米尺度。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.572466

Xi Yang, Haitao Chen, Lucas Kreiss, Clare B Cook, Genevieve Kuczewski, Mark Harfouche, Martin O Bohlen, Roarke Horstmeyer

引用次数: 0

Wavelength- and polarization-dependent enhancement of the magneto-optical effect with Al-doped 4H-SiC. 掺铝4H-SiC对磁光效应的波长和偏振依赖性增强。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.567390

Haoze Du, Takuya Kadowaki, Naoya Tate, Yuji Oki, Motoichi Ohtsu, Kenshi Hayashi

引用次数: 0

High-precision acoustic event monitoring in single-mode fibers using Fisher information. 基于Fisher信息的单模光纤高精度声事件监测。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.570619

Catarina S Monteiro, Tiago D Ferreira, Nuno A Silva

{"title":"High-precision acoustic event monitoring in single-mode fibers using Fisher information.","authors":"Catarina S Monteiro, Tiago D Ferreira, Nuno A Silva","doi":"10.1364/OL.570619","DOIUrl":"https://doi.org/10.1364/OL.570619","url":null,"abstract":"Polarization optical fiber sensors are based on modifications of fiber birefringence by an external measurand (e.g., strain, pressure, acoustic waves). Yet, this means that different input states of polarization will result in very distinct behaviors, which may or may not be optimal in terms of sensitivity and signal-to-noise ratio. To tackle this challenge, this manuscript presents an optimization technique for the input polarization state using the Fisher information formalism, which allows for achieving maximal precision for a statistically unbiased metric. By first measuring the variation of the Mueller matrix of the optical fiber in response to controlled acoustic perturbations induced by piezo speakers, we compute the corresponding Fisher information operator. Using maximal information states of the Fisher information, it was possible to observe a significant improvement in the performance of the sensor, increasing the signal-to-noise ratio from 4.3 to 37.6 dB, attaining an almost flat response from 1.5 kHz up to 15 kHz. As a proof-of-concept for dynamic audio signal detection, a broadband acoustic signal was also reconstructed with significant gain, demonstrating the usefulness of the introduced formalism for high-precision sensing with polarimetric fiber sensors.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6117-6120"},"PeriodicalIF":3.3,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural network-based dynamic nonlinear MIMO equalization in 3-D polarization multiplexed direct detection systems. 三维偏振复用直接检测系统中基于神经网络的动态非线性MIMO均衡。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2025-10-01 DOI: 10.1364/OL.569070

Weiqi Lu, Yuhao Fang, Yang Zou, Puzhen Yuan, Haojie Zhu, Dayu Shi, Qi Yang, William Shieh

引用次数: 0