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Optical frequency combs are utilized in a wide range of optical applications, including atomic clocks, interferometers, and various sensing technologies. They are often generated via four-wave mixing in chip-integrated microring resonators,…

Quantum Physics · Physics 2026-05-04 Patrick Tritschler , Torsten Ohms , André Zimmermann , Peter Degenfeld-Schonburg

The cavity electromechanical devices with radiation-pressure-interaction induced Kerr-like nonlinearity are promising candidates to generate microwave frequency combs. We construct a silicon-nitride-membrane-based superconducting cavity…

Quantum Physics · Physics 2022-04-14 Sishi Wu , Yulong Liu , Qichun Liu , Shuai-Peng Wang , Zhen Chen , Tiefu Li

We present an analytical and numerical investigation into the phenomenon of filter-induced modulation instability in passive hybrid optical resonators exhibiting quadratic and cubic nonlinearity. We show that asymmetric spectral losses,…

The optical microresonator-based frequency comb (microcomb) provides a versatile platform for nonlinear physics studies and has wide applications ranging from metrology to spectroscopy. Deterministic quantum regime is an unexplored aspect…

Quantum noise limits the sensitivity of optical measurements, but squeezed states of light enable quantum-enhanced metrology, sensing, and information processing. Most on-chip squeezed-light sources rely on Kerr ($\chi^{(3)}$)…

Four wave mixing (FWM) is an important way to generate supercontinuum and frequency combs in the mid-infrared band. Here, we obtain simultaneous synthetic FWM in the visible and mid-infrared bands by cascading quadratic nonlinear processes…

Scalable generation of nonclassical light sources on an integrated platform is a key requirement for photonic quantum information processing. In particular, realizing multiple indistinguishable squeezed light sources on a single chip is an…

Significant efforts have been made to enhance the performance of displacement sensors limited by quantum noise, such as gravitational wave detectors. Techniques like frequency-dependent squeezing have overcome the standard quantum limit in…

Quantum Physics · Physics 2024-10-23 Haodong Xu , Zijun Shu , Nianqin Li , Yang Shen , Bo Ji , Yongjun Yang , Tengfei Wu , Mingliang Long , Guangqiang He

Frequency combs consist of a spectrum of evenly spaced spectral lines. Optical frequency combs enable technologies ranging from timing, LiDAR, and ultra-stable signal sources. Microwave frequency combs are analogous to optical frequency…

Applied Physics · Physics 2026-02-23 Ian Anderson , Jack Kramer , Tzu-Hsuan Hsu , Yinan Wang , Vakhtang Chulukhadze , Ruochen Lu

Quantum frequency combs (QFCs) are versatile resources for multi-mode entanglement, such as cluster states, crucial for quantum communication and computation. On-chip whispering gallery mode resonators (WGMRs) can generate these states at…

Quantum Physics · Physics 2024-11-21 Bo Ji , Yongjun Yang , Tengfei Wu , Nianqin Li , Guangqiang He

Integrated microresonator facilitates the realization of quantum frequency comb (QFC), which provides a large number of discrete frequency modes with broadband spectral range and narrow linewidth. However, all previous demonstrations have…

Quantum Physics · Physics 2024-04-19 Wenjun Wen , Wenhan Yan , Chi Lu , Liangliang Lu , Xiaoyu Wu , Yanqing Lu , Shining Zhu , Xiao-song Ma

Squeezed light offers genuine quantum advantage in enhanced sensing and quantum computation; yet the level of squeezing or quantum noise reduction generated from nanophotonic chips has been limited. In addition to strong quantum noise…

Harmonic frequency combs, in which the lasing modes are separated by a period of tens of free spectral ranges from each other, have been recently discovered in quantum cascade lasers (QCLs). There is an ongoing debate how the harmonic combs…

Optics · Physics 2020-08-05 Yongrui Wang , Alexey Belyanin

We observe high optical quality factor (Q) polygonal and star coherent optical modes in a lithium niobate microdisk. In contrast to the previous polygon modes achieved by deformed microcavities at lower mechanical and optical Q, we adopted…

Frequency combs have revolutionized metrology, ranging, and optical clocks, which have motivated substantial efforts on the development of chip-scale comb sources. The on-chip comb sources are currently based on electro-optic modulation,…

The road towards the realization of quantum cascade laser (QCL) frequency combs (QCL-combs) has undoubtedly attracted ubiquitous attention from the scientific community, as these devices promise to deliver all-in-one (i.e. a single,…

Instrumentation and Detectors · Physics 2020-04-08 Luigi Consolino , Francesco Cappelli , Pablo Cancio , Iacopo Galli , Davide Mazzotti , Saverio Bartalini , Paolo De Natale

We explore self-induced parametric coupling, also called internal resonances (IRs), in a membrane nanoelectromechanical system. Specifically, we focus on the formation of a limit cycle manifesting as a phononic frequency comb. Utilizing a…

Mesoscale and Nanoscale Physics · Physics 2025-08-08 Mengqi Fu , Orjan Ameye , Fan Yang , Jan Košata , Javier del Pino , Oded Zilberberg , Elke Scheer

Advanced bosonic quantum computing architectures demand nonlocal Gaussian operations such as two-mode squeezing to unlock universal control, enable entanglement generation, and implement logical operations across distributed modes. This…

Quantum Physics · Physics 2025-07-31 Eliya Blumenthal , Nir Gutman , Ido Kaminer , Shay Hacohen-Gourgy

We present a theoretical model of multimode quantum correlations in bright frequency combs generated in continuous-wave regime by microresonators above threshold. Our analysis shows how these correlations emerge from cascading four-wave…

In this paper, we propose a liquid core suspended photonic crystal fiber (LCSPCF) as a potential waveguide structure for nonlinear applications. We emphasize the dramatic improvement of the nonlinear properties of the PCF through the…

Optics · Physics 2021-04-07 A. Sharafali , A. K. Shafeeque Ali , M. Lakshmanan
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