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Integrated electro-optic modulator on a lead zirconate titanate-silicon nitride heterogeneous platform. 锆钛酸铅-氮化硅异质平台上的集成电光调制器。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.538022
Wenfeng Zhou, Yong Zhang, Yongheng Jiang, Pu Zhang, Jian Shen, Xun Zhang, Yuqi Chen, Min Sun, Feng Qiu, Huifu Xiao, Yonghui Tian, Yikai Su
{"title":"Integrated electro-optic modulator on a lead zirconate titanate-silicon nitride heterogeneous platform.","authors":"Wenfeng Zhou, Yong Zhang, Yongheng Jiang, Pu Zhang, Jian Shen, Xun Zhang, Yuqi Chen, Min Sun, Feng Qiu, Huifu Xiao, Yonghui Tian, Yikai Su","doi":"10.1364/OL.538022","DOIUrl":"10.1364/OL.538022","url":null,"abstract":"<p><p>Integrated electro-optic (EO) modulators are the core components of the optoelectronic information technology, and lithium niobate is currently the most widely used crystalline thin film material; however, finite EO coefficients limit the modulation efficiency of the modulators. In this Letter, we present an integrated EO modulator using a microring resonator on the lead zirconate titanate (PZT) and silicon nitride (SiN) heterogeneous platform. The microwave attenuation is reduced by using low loss tangent and dielectric constant SiN as the electrode substrate, achieving an EO bandwidth of 33 GHz. Thanks to the high quality of the PZT film deposition and the substantial EO overlap of our structure, ultrahigh modulation efficiency with the half-wave voltage-length product of 0.7 V·cm is achieved. In addition, as a remarkable result, an 80-Gbps on-off keying signal is generated using the modulator.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6353-6356"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639536","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
Reciprocity-assisted ghost imaging through dynamic random media. 通过动态随机介质的互惠辅助鬼影成像。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.542962
Edward Tananyan, Ohad Lib, Michal Zimmerman, Yaron Bromberg
{"title":"Reciprocity-assisted ghost imaging through dynamic random media.","authors":"Edward Tananyan, Ohad Lib, Michal Zimmerman, Yaron Bromberg","doi":"10.1364/OL.542962","DOIUrl":"10.1364/OL.542962","url":null,"abstract":"<p><p>Ghost imaging enables the imaging of an object using intensity correlations between a single-pixel detector placed behind the object and a camera that records the light that did not interact with the object. The object and the camera are often placed at conjugate planes to ensure correlated illumination patterns. Here, we show how the combined effect of optical reciprocity and the memory effect in a random medium gives rise to correlations between two beams that traverse the random medium in opposite directions. In a proof-of-principle experiment, we observe such correlations when the beams traverse two thin diffusers separated by a variable distance. We find that the angular width of the region over which the beams are correlated decreases as the distance between the diffusers is increased. We then utilize these correlations to demonstrate a ghost imaging scheme in which the object and camera are placed at opposite ends of the random medium and illuminated by counter-propagating beams that can potentially be emitted by two different sources.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6473-6476"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639551","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
Tunable silicon integrated quantum light source with on-chip FSR-free filters. 带有片上无 FSR 滤波器的可调硅集成量子光源。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.533799
Zhanping Jin, Qirui Ren, Dongning Liu, Xiaosong Ren, Yidong Huang, Wei Zhang
{"title":"Tunable silicon integrated quantum light source with on-chip FSR-free filters.","authors":"Zhanping Jin, Qirui Ren, Dongning Liu, Xiaosong Ren, Yidong Huang, Wei Zhang","doi":"10.1364/OL.533799","DOIUrl":"10.1364/OL.533799","url":null,"abstract":"<p><p>In this work, we design and fabricate a telecom band quantum light source (QLS) on a silicon photonic chip, which integrates a piece of a long silicon waveguide as the nonlinear medium for spontaneous four-wave mixing (SFWM) and five narrow FSR-free bandpass filters based on a grating-assisted contra-directional coupler (GACDC). Two optical filtering functions of the silicon integrated QLS have been demonstrated. First, the QLS supports two tunable outputs of photon pair generations by four GACDC filters. A wavelength tunable range of 6 nm is demonstrated. Second, one GACDC bandpass filter is designed as an on-chip pump filter before the silicon waveguide. The performances of the QLSs with and without the on-chip pump filter are measured and compared. It shows that the on-chip pump filter has the effect to enhance the performance of the QLS by suppressing the Raman noise photons generated when a pump light propagated in optical fibers before it is injected into the chip. These results show that FSR-free filters would play important roles in developing silicon integrated QLSs.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6385-6388"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639562","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
Randomizing polarization of displays for fundamental improvement of color mura caused by birefringence. 对显示器进行随机偏振，从根本上改善双折射造成的色差。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.544097
Shizuki Sasaki, Yasuhiro Koike
{"title":"Randomizing polarization of displays for fundamental improvement of color mura caused by birefringence.","authors":"Shizuki Sasaki, Yasuhiro Koike","doi":"10.1364/OL.544097","DOIUrl":"https://doi.org/10.1364/OL.544097","url":null,"abstract":"<p><p>Most existing displays utilize polarization technologies to produce images and improve image quality. However, polarized light from displays causes color mura because of the birefringence of the polymer films used. Thus, eliminating color degradation remains a challenge despite the incorporation of complex polarization technologies such as retardation films. Our proposed random depolarization film (RDF) addresses this issue by randomizing the polarization of light from displays. Chromaticity measurements demonstrate that the RDF effectively compensates for color mura due to low-cost polymer films. Notably, the RDF compensation mechanism is independent of the RDF position and light source spectrum. Therefore, the RDF could be an innovative solution for color degradation in existing displays.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6501-6504"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639549","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
Turning four-wave mixing on and off in elliptically birefringent fibers via narrow frequency detuning. 通过窄频失谐打开和关闭椭圆双折射光纤中的四波混合。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.542187
Neel Choksi, Li Qian
{"title":"Turning four-wave mixing on and off in elliptically birefringent fibers via narrow frequency detuning.","authors":"Neel Choksi, Li Qian","doi":"10.1364/OL.542187","DOIUrl":"https://doi.org/10.1364/OL.542187","url":null,"abstract":"<p><p>Controlling four-wave mixing (FWM) is vital for several applications, including fiber optical communication, optical signal processing, optical amplification, and frequency generation. This paper presents a novel, to our knowledge, approach to control unidirectional FWM in elliptically birefringent fibers. By leveraging the frequency-dependent polarization eigenmodes of these fibers and detuning the optical frequency of one of the pump fields by a few megahertz, we can turn the FWM interaction on and off, thus controlling the generation of signal and idler fields. Moreover, this approach allows us to turn off the FWM interaction at any desired frequency, enabling all-optical switching and narrowband filtering applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6421-6424"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639563","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
Ultrafast visible fiber laser mode-locked by frequency-shifted feedback of an α-BaTeMo2O9 crystal acousto-optic modulator. 通过α-BaTeMo2O9 晶体声光调制器的频移反馈实现超快可见光光纤激光器锁模。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.539126
Tianran Li, Lu Huang, FeiFei Guo, Jingbin Lan, Lan Lan, Yikun Bu, Zeliang Gao, Zhengqian Luo
{"title":"Ultrafast visible fiber laser mode-locked by frequency-shifted feedback of an α-BaTeMo<sub>2</sub>O<sub>9</sub> crystal acousto-optic modulator.","authors":"Tianran Li, Lu Huang, FeiFei Guo, Jingbin Lan, Lan Lan, Yikun Bu, Zeliang Gao, Zhengqian Luo","doi":"10.1364/OL.539126","DOIUrl":"https://doi.org/10.1364/OL.539126","url":null,"abstract":"<p><p>We report the first demonstration, to the best of our knowledge, of visible mode-locked fiber laser using frequency-shifted feedback (FSF) with a visible α-BaTeMo<sub>2</sub>O<sub>9</sub> (α-BTM) crystal acousto-optic modulator (AOM). First, an α-BTM crystal is used as the visible high-quality AOM with a high diffraction efficiency of 85<i>%</i>, a fast rise/fall time of 79/98 ns, and a low insertion loss of 0.2 dB at 635 nm. Then, the 635 nm FSF mode-locked fiber laser is achieved using a Pr<sup>3+</sup>:doped ZBLAN double-clad fiber as a visible gain medium and the α-BTM AOM as a frequency-shifting element. Self-starting mode-locking at 635 nm directly generates red laser pulses with a pulse duration of 45 ps and a repetition frequency of 31.8 MHz. Furthermore, we investigate the evolution of mode-locking dynamics as the α-BTW-AOM feedback-frequency, which helps further understand the FSF dynamics by directly generating visible ultrashort pulses.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6357-6360"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639564","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
2-µm energy-managed soliton fiber laser. 2 微米能量管理孤子光纤激光器。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.544054
Mostafa I Mohamed, Aurélien Coillet, Philippe Grelu
{"title":"2-µm energy-managed soliton fiber laser.","authors":"Mostafa I Mohamed, Aurélien Coillet, Philippe Grelu","doi":"10.1364/OL.544054","DOIUrl":"10.1364/OL.544054","url":null,"abstract":"<p><p>To generate energetic short pulses from fiber laser oscillators in the 2-µm emission window, we here propose an alternative to the conventional methods of pulse stretching and dispersion management. We build a passively mode-locked fiber laser from anomalous single-mode fibers and utilize strong dissipative effects to delineate high and low pulse energy sections within the cavity. Whereas the main laser output delivers low-chirp sub-ps pulses with an energy up to 12 nJ, the intracavity pulse is reshaped into a ∼0.1-nJ conventional soliton, stabilizing the laser dynamics while enabling a wide tunability in both repetition rate and central emission wavelength.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6537-6540"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639468","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
Chirality-controlled second-order nonlinear frequency conversion in lithium niobate film metasurfaces. 铌酸锂薄膜元表面中的手性控制二阶非线性频率转换。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.538625
Hangsheng Xu, Ruize Ma, Ying Zhu, Anlong Dong, Haiyan Jiang, Weiqing Gao, Meng Qin, Jianqiang Liu, Feng Wu, Hongju Li
{"title":"Chirality-controlled second-order nonlinear frequency conversion in lithium niobate film metasurfaces.","authors":"Hangsheng Xu, Ruize Ma, Ying Zhu, Anlong Dong, Haiyan Jiang, Weiqing Gao, Meng Qin, Jianqiang Liu, Feng Wu, Hongju Li","doi":"10.1364/OL.538625","DOIUrl":"10.1364/OL.538625","url":null,"abstract":"<p><p>The high-quality factor resonant metasurfaces have extensive applications in enhancing nonlinear frequency conversion efficiency at the subwavelength scale. However, methods for actively modulating the frequency conversion process are limited. We design a chiral lithium niobate film metasurface and investigate the photonic spin as a new degree of freedom to dynamically control the second-order nonlinear frequency conversion, without reconfiguring the structure by using external stimuli. The chiral resonance with circular dichroism (CD) of 0.62 gives rise to a high nonlinear CD of 0.84 in second-harmonic generation efficiency. Interestingly, combining the chiral resonance and an achiral quasi-bound state in the continuum enables us to investigate the photonic-spin-controlled sum-frequency generation and the photon pair generation from the spontaneous parametric downconversion process. Owing to the ultrahigh quality factor exceeding 10<sup>3</sup> both for two resonances, the second-order nonlinear frequency conversion occurs at a wavelength region of 0.2 nm, suggesting good monochromaticity. Our work opens new, to our knowledge, avenues for practical implementation of dynamically controlled nonlinear optical devices and will find utility in holography, switchable light sources, and information processing.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6405-6408"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639478","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
Merging bound states in the continuum-driven ultrahigh sensing figure of merit in all-dielectric metasurfaces. 全介质元表面中连续驱动超高传感功勋值的合并束缚态。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.539928
Chun Li, Xiaomei Gao, Xinyi Deng, Jiaqi Guo, Chao Shen, Qing Zhang
{"title":"Merging bound states in the continuum-driven ultrahigh sensing figure of merit in all-dielectric metasurfaces.","authors":"Chun Li, Xiaomei Gao, Xinyi Deng, Jiaqi Guo, Chao Shen, Qing Zhang","doi":"10.1364/OL.539928","DOIUrl":"10.1364/OL.539928","url":null,"abstract":"<p><p>Radiation-free photonic bound states in the continuum (BIC) in metasurfaces allow ultrahigh quality (Q) factor and strongly confined mode volume, which are extremely advantageous in the development of ultrasensitive microcavity sensors. However, the conventional isolated BICs are susceptible to failure due to symmetry breaking caused by fabrication imperfection and nonzero incident angle. Here, we propose a silicon nitride-based metasurface with multiple BIC merging. The merging of accidental BIC and symmetry-protected BIC can increase the Q-factor near the Brillouin zone Γ point and thus robustly induces a figure of merit (FOM) of refractive index sensing at small incident angles two orders of magnitude higher than that in isolated BIC configuration. Specifically, the FOM in merging BIC reaches 10<sup>8</sup> at a 2° incident angle. The BIC merging can be universally achieved in square lattices with C<sub>4</sub> symmetry, and slower decay of Q-factor and higher FOM can further occur in hexagonal lattices benefiting from higher-order topological charges. The advantage of merging BIC is also maintained when considering in-plane and out-of-plane symmetry breaking. These results offer a unique design path for high-performance metasurface sensors and can be extended to other high-Q applications such as low-threshold lasers, nonlinear frequency conversion, and low-loss waveguides.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6469-6472"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639500","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
Ge-on-Si single-photon avalanche diode using a double mesa structure. 采用双介子结构的硅基单光子雪崩二极管。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2024-11-15 DOI: 10.1364/OL.534436
Maurice Wanitzek, Jörg Schulze, Michael Oehme
{"title":"Ge-on-Si single-photon avalanche diode using a double mesa structure.","authors":"Maurice Wanitzek, Jörg Schulze, Michael Oehme","doi":"10.1364/OL.534436","DOIUrl":"10.1364/OL.534436","url":null,"abstract":"<p><p>We present experimental results of Ge-on-Si single-photon avalanche diodes based on a novel, to our knowledge, double mesa structure. Using this structure, the electric field at the mesa edges is suppressed compared to a traditional single mesa, leading to significant performance improvements. The dark current in linear mode shows a smaller increase for larger reverse voltages, resulting in a reduction by more than 260 times at low temperatures. Operated in the Geiger-mode at 110 K, the dark count rate in the double mesa is 100 times smaller. The devices achieve a dark count rate of 953 kHz, a single-photon detection efficiency of 7.3%, and a record-low jitter of 81 ps at an excess bias of 17.6% and a temperature of 110 K.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 22","pages":"6345-6348"},"PeriodicalIF":3.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142639512","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
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