Article
Optics
Marcus Albrechtsen, Babak Vosoughi Lahijani, Soren Stobbe
Summary: We present a theoretical study on dielectric bowtie cavities and identify two distinct confinement regimes. Distinguishing between these regimes is crucial for future research on nanocavities and enables strongly enhanced light-matter interaction over large bandwidths.
Article
Optics
Seth Lovett, Paul M. Walker, Alexey Osipov, Alexey Yulin, Pooja Uday Naik, Charles E. Whittaker, Ivan A. Shelykh, Maurice S. Skolnick, Dmitry N. Krizhanovskii
Summary: This article investigates the effects of photonic spin-orbit coupling on the propagation of polariton wavepackets in planar semiconductor microcavities and polaritonic analogues of graphene. The authors observe an analogue Zitterbewegung effect, which refers to the oscillations of a wavepacket's center of mass perpendicular to its propagation. They demonstrate this effect in both planar microcavities and honeycomb lattices of coupled microcavity resonators.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Hanxiang Tong, Hongsheng Li, Hao Huang, Aimin Wu, Tun Cao, Dongming Guo
Summary: By studying the transmission matrix of multi-layer thin films system, a practical approach is provided for preparing photonic crystals with low infrared emissivity. By changing the material selection and optimizing the structure, high infrared reflectivity states can be achieved using periodic multi-layer film structures. Various photonic crystals can be designed by changing the central wavelength.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Zhaoran Chu, Zheng Ding, Xuanjun Ning, A. Yimihan, Menghan Wang, Kan Shao, Wenwei Tang, Cheng Chen, Jianzhong Bai
Summary: This article presents a rapid curing method for preparing colloidal photonic crystal films, which exhibit good properties and potential applications.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Wei Liu, Yaolong Li, Haoran Yu, Ju Wang, Aiqin Hu, Shangtong Jia, Xiaofang Li, Hong Yang, Lun Dai, Guowei Lu, Yunquan Liu, Shufeng Wang, Qihuang Gong
Summary: Perovskite microcavities exhibit excellent photophysical properties for optoelectronic devices such as nanolasers. This study uses photoemission electron microscopy (PEEM) to image photonic modes within optical microcavities at nanometer-scale resolution, revealing characteristic cavity modes and enabling real-time imaging and control of light focus. By effectively observing cavity modes in perovskites through PEEM, the design of optoelectronic devices based on perovskite microcavities is advanced.
ADVANCED MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Yuxia Luo, Zhuo Chen, Ping He, Qingdi Liu, Zemin He, Yuzhen Zhao, Hao Ma, Liye Li, Zhao Zhang, Xinping Li, Qing Han
Summary: A new design for chiral photonic cellulose nanocrystal films was developed by co-assembling lanthanide-doped nanorods into chiral cellulose nanocrystals, which allows for tuning the photonic band gap in the visible range by changing the mass fraction of flexible agents. The luminescence modulation in these nanocrystal films is achieved due to the band edge effect, enhancing the down-conversion and up-conversion luminescence. These biocompatible photonic cellulose nanocrystal films show great potential in applications such as optical coding, optical resonators, and biocompatible lasers.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Nanoscience & Nanotechnology
Fabio Isa, James P. Best, Anna Marzegalli, Marco Albani, Christophe Comte, Jamie J. Kruzic, Avi Bendavid
Summary: A novel approach is presented in this paper to tailor the stress properties of diamond thin films through boron doping and micro-fabrication of bridges using focused ion beam milling. Experimental data, supported by detailed confocal micro-Raman investigations and finite element method calculations, suggest that appropriate design of microbridge geometries, together with boron doping, can significantly enhance or diminish material stress compared to non-patterned thin films. This approach, combined with deterministic incorporation and positioning of diamond color centers, may offer new opportunities to tailor the optical and spin properties of diamond-based quantum devices through stress engineering.
Article
Multidisciplinary Sciences
Maodong Gao, Qi-Fan Yang, Qing-Xin Ji, Heming Wang, Lue Wu, Boqiang Shen, Junqiu Liu, Guanhao Huang, Lin Chang, Weiqiang Xie, Su-Peng Yu, Scott B. Papp, John E. Bowers, Tobias J. Kippenberg, Kerry J. Vahala
Summary: This study reports measurements of material-limited Q factors in several photonic material platforms and reveals the relationship between nonlinear characteristics and ultimate Q in different materials. This is significant for guiding microresonator design and material development, as well as determining performance limits in future photonic integrated systems.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Xiaoxuan Luo, Yin Cai, Xin Yue, Wei Lin, Jingping Zhu, Yanpeng Zhang, Feng Li
Summary: This study reports the formation mechanism and non-Hermitian properties of optical skyrmions formed by photonic spin-orbit coupling. By introducing circularly polarized gain and loss, as well as spatially inhomogeneous pumping, the spin textures of skyrmions can be controlled, and skyrmion lasers can be achieved. These findings provide a new approach for the non-Hermitian control of photonic spin in confined systems.
PHOTONICS RESEARCH
(2023)
Review
Physics, Multidisciplinary
Hongyu Zhang, Wen Zhao, Yaotian Liu, Jiali Chen, Xinyue Wang, Cuicui Lu
Summary: Photonic-plasmonic hybrid microcavities have a higher figure of merit Q/V, enhancing light-matter interaction. They include photonic crystal microcavities, whispering gallery mode microcavities, Fabry-Perot microcavities, demonstrating their physics and applications. Topological photonic crystal microcavities and hybrid nano-cavities also provide a robust platform for nanophotonic devices.
Review
Chemistry, Multidisciplinary
Chengliang Duan, Zheng Cheng, Bin Wang, Jinsong Zeng, Jun Xu, Jinpeng Li, Wenhua Gao, Kefu Chen
Summary: Cellulose nanocrystals possess unique features such as high purity and crystallinity, allowing them to form entire films with bright structural colors through self-assembly. This new generation material is environmentally friendly and versatile, making it a popular choice in various fields of application.
Article
Polymer Science
Ami Amano, Toshimitsu Kanai
Summary: We demonstrate the ability to control both the optical stopband wavelength and effective bandwidth of gel-immobilized loosely packed colloidal photonic crystals. By photopolymerizing the gelation reagent of charge-stabilized colloidal crystals under different upper- and bottom-light intensities, we obtain a gel-immobilized film with broadened Bragg reflection peak. Furthermore, by varying the swelling solvent concentration, we can vary the Bragg wavelength over a wide range while maintaining the same broadened effective bandwidth.
Article
Engineering, Chemical
Kenta Komatsu, Tomokatsu Hayakawa, Hiroshi Fudouzi
Summary: In this study, a sandwich structure was formed by bonding two fcc structure colloidal crystal films together using hot pressing, and a clear defect mode was observed. The effect of the thickness of the defect layer in the sandwich structure on the optical properties was investigated.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Jan Fait, Marian Varga, Karel Hruska, Alexander Kromka, Bohuslav Rezek, Lukas Ondic
Summary: Researchers have demonstrated a new and simple two-step method for fabricating diamond PhC slabs with leaky modes overlapping the emission line of the silicon vacancy (SiV) centers. By first fabricating a PhC structure with leaky modes blue shifted from the SiV emission line in nanocrystalline diamond without SiV centers, and then depositing a thin layer of SiV-rich diamond over the PhC slab to adjust the spectral position of the PhC leaky modes to the emission line of the SiV centers, an intensity enhancement of the zero-phonon line of the SiV centers by a factor of nine is achieved. This PhC tuning method has potential applications for other optical centers and photonic structures in various materials.
Review
Materials Science, Ceramics
Kaili Wang, Xiangyuan Dong, Yanyan Bu, Xiangfu Wang
Summary: Photonic crystals (PCs) can significantly enhance the optoelectronic performance of LEDs due to their unique color and photonic band gap. This review discusses the main principles of using PCs to improve LEDs and summarizes 12 structural applications, including PC slabs, Bragg gratings, backside reflectors, surface PC, embedded PC, dual PC, PC beads, CPC, PC thin films, LIPC, defective PC, and composite architectures. It is found that PCs can improve not only the light extraction efficiency of LEDs but also other optoelectronic properties, and reduce manufacturing costs. PC LEDs are expected to be a strong candidate for future lighting technology. Additionally, the prospects and challenges of PC LEDs are also summarized.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Editorial Material
Materials Science, Multidisciplinary
Igor Aharonovich, Sejeong Kim, Jin Liu, Arka Majumdar, Elke Neu
OPTICAL MATERIALS EXPRESS
(2020)
Article
Physics, Multidisciplinary
Ariel Norambuena, Alejandro Jimenez, Christoph Becher, Jeronimo R. Maze
NEW JOURNAL OF PHYSICS
(2020)
Review
Chemistry, Analytical
Dipti Rani, Oliver Roman Opaluch, Elke Neu
Summary: Diamond has seen increased use in various fields in the past two decades due to its outstanding mechanical properties, wide optical transparency, and biocompatibility. Recent advances in methods for SCD nano-structuring have enabled the realization of micro- and nano-structures for a wide range of applications, including the controlled incorporation of optically active point defects such as nitrogen vacancy centers. Challenges in scaling up SCD nano-structure fabrication and its commercial applications are discussed, along with future prospects.
Article
Nanoscience & Nanotechnology
Axel Hochstetter, Elke Neu
Summary: This study investigates the impact of laser wavelength on NV- by studying diamond nanopillars with different geometries, finding significant enhancement of laser fields within the pillars and at the interface between the substrate and nanopillar.
Article
Chemistry, Multidisciplinary
Oliver Roman Opaluch, Nimba Oshnik, Richard Nelz, Elke Neu
Summary: The study introduces a planar, omega-shaped microwave antenna based on stripline for spin control of NV color centers in diamond. An optimal antenna design was found through finite integral simulations, and antennas were successfully fabricated on a glass substrate, creating highly uniform microwave fields.
Article
Optics
Philipp Fuchs, Thomas Jung, Michael Kieschnick, Jan Meijer, Christoph Becher
Summary: An efficient planar optical antenna based on silver mirrors coated on a thin single crystal diamond membrane has been proposed to improve photon extraction from single tin vacancy (SnV) centers and their coupling to an excitation laser. Numerical optimization shows a theoretical enhancement in the collectible photon rate by a factor of 60 compared to the bulk case. Experimental results demonstrate a significant reduction in the required excitation power and high mechanical stability of the structure, showcasing its functionality as an optical antenna for a large number of emitters inside the membrane.
Review
Optics
Stefan Kueck, Marco Lopez, Helmuth Hofer, Hristina Georgieva, Justus Christinck, Beatrice Rodiek, Geiland Porrovecchio, Marek Smid, Stephan Goetzinger, Christoph Becher, Philipp Fuchs, Pietro Lombardi, Costanza Toninelli, Marco Trapuzzano, Maja Colautti, Giancarlo Margheri, Ivo Pietro Degiovanni, Paolo Traina, Sven Rodt, Stephan Reitzenstein
Summary: Single-photon sources have various applications, including quantum radiometry and calibration of single-photon detectors. European National Metrology Institutes (NMIs) are conducting extensive research in collaboration with universities to optimize different types of single-photon sources.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Editorial Material
Physics, Applied
Christoph Becher, Sven Hoefling, Jin Liu, Peter Michler, Wolfram Pernice, Costanza Toninelli
APPLIED PHYSICS LETTERS
(2022)
Article
Quantum Science & Technology
Johannes Goerlitz, Dennis Herrmann, Philipp Fuchs, Takayuki Iwasaki, Takashi Taniguchi, Detlef Rogalla, David Hardeman, Pierre-Olivier Colard, Matthew Markham, Mutsuko Hatano, Christoph Becher
Summary: This study reveals a charge cycle that can be applied to various group IV-vacancy centers and exploits it to achieve efficient and rapid initialization of the desired negative charge state. It also demonstrates a spin state readout method without the need for aligning a magnetic field.
NPJ QUANTUM INFORMATION
(2022)
Article
Multidisciplinary Sciences
Tim van Leent, Matthias Bock, Florian Fertig, Robert Garthoff, Sebastian Eppelt, Yiru Zhou, Pooja Malik, Matthias Seubert, Tobias Bauer, Wenjamin Rosenfeld, Wei Zhang, Christoph Becher, Harald Weinfurter
Summary: This paper demonstrates the feasibility of distributing heralded entanglement over telecom fiber links, which is an important step towards the realization of large-scale quantum network links.
Article
Quantum Science & Technology
Elena Arenskoetter, Tobias Bauer, Stephan Kucera, Matthias Bock, Juergen Eschner, Christoph Becher
Summary: Researchers have developed a photonic interface to connect a Ca-40(+) single-ion quantum memory to telecom C-band photons, enabling the distribution of entanglement in quantum networks. The interface utilizes cavity-enhanced spontaneous parametric down-conversion photon pairs and bi-directional polarization-conserving quantum frequency conversion. The team demonstrated the preservation of high-fidelity entanglement during conversion, fiber transmission up to 40 km, and back-conversion to the memory wavelength, with an entanglement fidelity larger than 95% (98%) without (with) background correction, even for the longest distance and bi-directional conversion.
NPJ QUANTUM INFORMATION
(2023)
Article
Engineering, Electrical & Electronic
Kee Suk Hong, Hee-Jin Lim, Dong Hoon Lee, In-Ho Bae, Kwang-Yong Jeong, Christoph Becher, Sejeong Kim, Igor Aharonovich
Summary: Single-photon sources based on single emitters are highly interesting for various applications and have been realized using different materials. Common factors related to relaxation times of internal states indirectly affect the photon number stability. GaN emitters demonstrate higher stability due to faster relaxation times compared to hBN emitters, but hBN emitters have higher photon generation rates. Repeatable radiant flux measurements of a bright hBN single-photon emitter for a wide range of fluxes have been demonstrated.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Baptiste Vindolet, Marie -Pierre Adam, Loic Toraille, Mayeul Chipaux, Antoine Hilberer, Geraud Dupuy, Lukas Razinkovas, Audrius Alkauskas, Gergo Thiering, Adam Gali, Mary De Feudis, Midrel Wilfried Ngandeu Ngambou, Jocelyn Achard, Alexandre Tallaire, Martin Schmidt, Christoph Becher, Jean-Francois Roch
Summary: In this study, we investigate the optical properties of silicon-vacancy (SiV) and germanium-vacancy (GeV) color centers in nanodiamonds under high pressures. We observe blueshifts in their spectra, and these shifts are in good agreement with ab initio calculations considering the lattice compression. This research provides guidance for using group-IV-vacancy centers as quantum sensors with specific optical and spin properties under extreme pressures.
Article
Optics
Nimba Oshnik, Phila Rembold, Tommaso Calarco, Simone Montangero, Elke Neu, Matthias M. Muller
Summary: Shallow nitrogen-vacancy (NV) centers are promising for high-precision sensing applications. To mitigate the negative effects of the complex environment, feedback-based quantum optimal control is applied, improving sensitivities and robustness through direct search and optimization of microwave pulses.
Proceedings Paper
Engineering, Electrical & Electronic
Tim van Leent, Florian Fertig, Matthias Bock, Robert Garthoff, Yiru Zhou, Sebastian Eppelt, Wei Zhang, Christoph Becher, Harald Weinfurter
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
