Silicon Photonics
Frequency stabilization of C-band semiconductor lasers through a SiN photonic integrated circuit
Alessandro Brugnoni, Ali Emre Kaplan, Valerio Vitali, Kyle Bottrill, Michele Re, Periklis Petropoulos, Cosimo Lacava, and Ilaria Cristiani
Photonics Research
  • Jul. 11, 2024
  • Vol. 12, Issue 8 (2024)
Optical Devices
Coupling ideality of standing-wave supermode microresonators
Min Wang, Yuechen Lei, Zhi-Gang Hu, Chenghao Lao, Yuanlei Wang, Xin Zhou, Jincheng Li, Qi-Fan Yang, and Bei-Bei Li
Photonics Research
  • Jul. 11, 2024
  • Vol. 12, Issue 8 (2024)
Imaging Systems, Microscopy, and Displays
Stimulation and imaging of neural cells via photonic nanojets
Heng Li, Xixi Chen, Tianli Wu, Zhiyong Gong, Jinghui Guo, Xiaosong Bai, Jiawei Li, Yao Zhang, Yuchao Li, and Baojun Li
Photonics Research
  • Jul. 11, 2024
  • Vol. 12, Issue 8 (2024)
Lasers and Laser Optics
Spectral programmable mid-infrared optical parametric oscillator
Junrui Liang, Jiangming Xu, Yanzhao Ke, Sicheng Li, Junhong He, Yidong Guo, Yang Zhang, Xiaoya Ma, Jun Ye, Xiao Li, Jinyong Leng, and Pu Zhou
Photonics Research
  • Jul. 11, 2024
  • Vol. 12, Issue 8 (2024)
Instrumentation and Measurements
Utilizing quantum coherence in Cs Rydberg atoms for high-sensitivity room-temperature terahertz detection: a theoretical exploration
Photonics Research
  • Jul. 01, 2024
  • Vol. 12, Issue 7 (2024)
PR Highlights
Photodynamic therapy (PDT) is a unique mode of treatment that employs a photosensitizer and light of a specific wavelength to eradicate cancer cells in a non-invasive manner. Upon activation, the photosensitizer generates highly reactive oxygen species (ROS) or other oxidizing agents, leading to cell death. Its history dates back to the early 20th century when scientists discovered that certain dyes could kill microbes under light exposure. Initial research focused on photosensitizer selection and light source application. With technological advancements in the 1970s, PDT began its application in cancer therapy. However, current PDT is mainly limited to skin and superficial tissue tumors due to the photosensitizers' sensitivity to visible light, which is absorbed by most biological molecules, limiting light penetration and reducing efficacy against deep-seated tumors. For greater penetration, near-infrared (NIR) light is ideal, given its lower absorption by biological tissues within the NIR window (700-1700 nm), allowing for better penetration and activation of photosensitizers deep within tumors, enhancing PDT's effectiveness.
Photonics Research
  • Jul. 12, 2024
  • Vol. 12, Issue 5 (2024)
Editors' Picks
Single-photon source (SPS) satisfies single-photon character, which means that the probability of detecting two or more photons simultaneously at any moment is zero. In quantum science and technology research, perfect single-photon character forms the basis for the security of quantum communications and also crucial for in optical quantum computing. Besides, to achieve efficient conversion of a quantum state between photons and atoms, the photon linewidth must be narrower than the atomic linewidth. Therefore, the SPS with subnatural linewidth is an ideal quantum information carrier for connecting remote atomic quantum nodes in quantum network. The simple fluorescence from single emitter, including atom and various atom-like systems (e.g., quantum dot, ion, molecule, and nitrogen-vacancy center), satisfies perfect single-photon character and thus fluorescent single photons is the most widely adopted SPS. Noteworthy, the single-photon character of fluorescence is a global property of all the spectral components of resonance fluorescence, including coherent and incoherent components, and the absence of a few spectral components can spoil the single-photon character. Studies based on two-level systems demonstrate that for resonance fluorescence, single-photon character and subnatural linewidth cannot be satisfied simultaneously, which means that the fluorescent single photons cannot have subnatural linewidth, and conversely, fluorescent components within subnatural linewidth cannot maintain single-photon character. Although there were many previous related studies, fluorescent single photons with subnatural linewidths were unsuccessfully realized. Consequently, it seems that the natural linewidth imposes a lower limit on the linewidth of fluorescent single photons.
Photonics Research
  • Jul. 10, 2024
  • Vol. 12, Issue 4 (2024)
Editors' Picks
With the rapid development of information technology, such as cloud computing, industrial Internet and 5G wireless, the capacity of optical fiber communication network shows an explosive growth trend. At present, the capacity of single core optical fibers is approaching the nonlinear Shannon transmission limit. Like polarization multiplexing and high-order modulation techniques, increasing spectral bandwidth technology is one of the important technical routes to solve the capacity crisis of single core optical fibers. The spectral bandwidth of the 2-micron band is about one order of magnitude higher than that of the traditional telecommunication C-band. This indicates that it is great potential by utilizing spectrum bandwidth technology to achieve ultra large optical communication capacity. In recent years, optoelectronic devices such as amplifiers, modulators, lasers, and detectors operating in the 2-micron wavelength band have received widespread attention from researchers, accelerating the research progress of 2-micron optical communication technology.
Photonics Research
  • Jul. 04, 2024
  • Vol. 12, Issue 4 (2024)
Editors' Picks
Multispectral detection or simultaneous collection of signals from different infrared bands provides enhanced target discrimination and identification, and has attracted increased interest. In this region, quantum cascade detector (QCD) is a very competitive candidate, but barely exploited.
Photonics Research
  • Jun. 24, 2024
  • Vol. 12, Issue 2 (2024)
Top Downloads
Chang Qiao, Haoyu Chen, Run Wang, Tao Jiang, Yuwang Wang, and Dong Li
  • Photonics Research
  • Vol. 12, Issue 3, 474 (2024)
Maximilien Billet, Stijn Cuyvers, Stijn Poelman, Artur Hermans, Sandeep Seema Saseendra, Tasuku Nakamura, Shinya Okamoto, Yasuhisa Inada, Kazuya Hisada, Taku Hirasawa, Joan Ramirez, Delphine Néel, Nicolas Vaissière, Jean Decobert, Philippe Soussan, Xavier Rottenberg, Gunther Roelkens, Jon Ø. Kjellman, and Bart Kuyken
  • Photonics Research
  • Vol. 12, Issue 3, A21 (2024)
Liming Yang, Ruihai Wang, Qianhao Zhao, Pengming Song, Shaowei Jiang, Tianbo Wang, Xiaopeng Shao, Chengfei Guo, Rishikesh Pandey, and Guoan Zheng
  • Photonics Research
  • Vol. 11, Issue 12, 2242 (2023)
Hui Zhang, Lingxiao Wan, Sergi Ramos-Calderer, Yuancheng Zhan, Wai-Keong Mok, Hong Cai, Feng Gao, Xianshu Luo, Guo-Qiang Lo, Leong Chuan Kwek, José Ignacio Latorre, and Ai Qun Liu
  • Photonics Research
  • Vol. 11, Issue 10, 1703 (2023)
Liuhao Zhu, Yuping Tai, Hehe Li, Huajie Hu, Xinzhong Li, Yangjian Cai, and Yijie Shen
  • Photonics Research
  • Vol. 11, Issue 9, 1524 (2023)