Article
Optics
Thomas Daugey, Cyril Billet, John Dudley, Jean-Marc Merolla, Yanne K. Chembo
Summary: Kerr comb generation is usually achieved by the nonlinear dynamics of the intracavity field in a whispering-gallery-mode resonator pumped by a continuous-wave laser. This study focuses on the dynamics of Kerr optical frequency combs when pumped by a synchronous pulse train, emphasizing the impact of pump-cavity desynchronization on the spectral shape of the output combs. The proposed model based on the extension of the Lugiato-Lefever equation successfully accounts for the pulsed nature of the pump and the mismatch between the resonator's free-spectral range and the repetition rate of the pulse train.
Review
Optics
A. E. Zhukov, N. Kryzhanovskaya, E. Moiseev, M. Maximov
Summary: The paper discusses microlasers with emission spectra determined by whispering gallery modes, utilizing various types of In(Ga)As quantum dots. Deep localization of charge carriers helps overcome undesirable effects, enabling the realization of microlasers capable of operating at elevated temperatures without temperature stabilization.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Guoping Lin, Tang Sun
Summary: This study demonstrates the fabrication of high-Q crystalline optical microresonators from cubic yttria-stabilized zirconia (YSZ) for the first time. The research shows interesting optical phenomena and opens up new possibilities for the design and applications of optical devices.
PHOTONICS RESEARCH
(2022)
Article
Optics
Guoping Lin, Jingyi Tian, Tang Sun, Qinghai Song, Yanne K. Chembo
Summary: A hundredfold increase of the backward stimulated Brillouin scattering (SBS) bandwidth in whispering-gallery mode resonators is reported. The variation of the acoustic phase velocity along the periphery due to the crystalline orientation results in a broad Brillouin gain. SBS phenomena with Brillouin shift frequencies ranging from 11.73 to 14.47 GHz in ultrahigh Q Z-cut magnesium fluoride cavities pumped at the telecommunication wavelength are demonstrated, along with the observation of a Brillouin-Kerr comb with over 400 comb lines spanning across a spectral window of 120 nm.
PHOTONICS RESEARCH
(2023)
Article
Optics
Guanghui Zhang, Qiujiao Du, Anshou Zheng, Hongyun Chen
Summary: In this study, we propose a method to achieve a strong indirect interaction between distant WGM resonators at room temperature, by exploiting the quantum critical point. The enhanced coupling strength between a WGM resonator and a low-frequency polariton is achieved through virtual excitations mediated by a far-off-resonant low-frequency polariton. This proposal provides a viable approach to building a quantum network based on strongly coupled WGM resonators.
Article
Engineering, Electrical & Electronic
Souleymane Diallo, Curtis R. Menyuk, Yanne K. Chembo
Summary: Kerr optical frequency combs have a wide range of applications in various fields and reducing pump power is a significant area of research. Evaluating the pump power requirements for comb generation is complicated due to the diverse platforms and properties of resonators. To address this, researchers propose a normalized threshold pump power metric to optimize Kerr comb generation independently of the platform.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yu Yang, Shuai Zhao, Yuan Shen, Lingjun Meng, Tianci Chen, Ziwen Huang, Lei Zhang, Keyi Wang
Summary: In this study, a whispering gallery mode micro-rod resonator was fabricated to investigate the mechanism of transmission between Kerr combs and Raman combs. It was found that under certain conditions, the optical frequency comb based on the WGM resonator can selectively access the Kerr-Raman state from the Kerr comb state through pump and detuning control, with Raman soliton combs easier to generate than Kerr soliton combs in silica-based WGM resonators.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Helene Nguewou-Hyousse, Yanne K. Chembo
Summary: The paper presents a theoretical analysis of the stochastic dynamics of miniature optoelectronic oscillators based on whispering-gallery mode resonators, investigating how noise sources are converted to output microwave signal fluctuations and how resonator Q-factors influence system dynamics. Time-domain numerical simulations show excellent agreement with analytical predictions.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
E. Yacoby, Y. London, G. Harari
Summary: Optical Whispering Gallery Mode (WGM) resonators are ideal for high sensitivity sensors due to their extremely high Q factors and low detection limit. In this study, we fabricated and packaged a cm-scale silica rod resonator with a Q factor of 7.5 * 10^8. The demonstrated packaging allows for tuning and adjusting the coupling efficiency, enabling modulation of the transmission power and loaded Q factor of the resonator.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Elisa Will, Luke Masters, Arno Rauschenbeutel, Michael Scheucher, Juergen Volz
Summary: The study demonstrates trapping of a single Rb-85 atom approximately 200 nm away from the surface of a whispering-gallery-mode bottle microresonator, and shows the observation of vacuum Rabi splitting in the excitation spectrum of the atom-resonator system. This first stable and controlled interaction of a single atom with the whispering-gallery mode in the strong coupling regime has potential for implementing quantum protocols and applications utilizing the chiral atom-light coupling in such resonators.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Xing-Yu Wu, Yong Zhang, Yong-Pan Gao, Chuan Wang
Summary: Research on optomagnonic structures has shown that magnon modes located near the edge of microresonators exhibit stronger coupling strength with optical modes, leading to efficient magneto-optical interaction and promoting the development of magneto-optical control, optical-microwave interaction, and optical nonlinearity.
Article
Optics
Xavier Zambrana-Puyalto, Davide D'Ambrosio, Gianluca Gagliardi
Summary: Whispering gallery modes are light modes that arise in cylindrically symmetric structures, with intensity profile strongly confined around the interface. Analytical demonstration shows that the coupling mechanism is related to angular momentum matching between inner WGMs of the sphere and incident beam. The model quantitatively predicts optical coupling efficiency for any tangential position of the incident beam.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Zhenmin Chen, Xin Tu, Maolin Dai, Qian Li, H. Y. Fu
Summary: In this work, we conducted a theoretical investigation on the dispersion relationship of microsphere cavities based on the theory of microcavity dispersion. The results revealed that the size of the microcavity corresponding to the zero dispersion point of the higher order mode is larger than that of the lower order mode at a certain wavelength. By utilizing mode coupling, we successfully achieved optical frequency comb in microsphere cavities with a diameter as small as 105 micrometers, with total dispersions in the normal dispersion region.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Xiaoyu Shi, Wanting Song, Dan Guo, Junhua Tong, Tianrui Zhai
Summary: In order to achieve a higher level of secure communication, efforts have been made to develop encryption and anticounterfeiting strategies. One significant approach is the concept of a spectral encryption based on selectively visualized spectral modes in random lasers. By coupling with external whispering gallery mode cavity, hidden localized lasing modes with special multiple-peaks spectra are selected for secure information encryption.
LASER & PHOTONICS REVIEWS
(2021)
