1.5k citations · 4k across the 26 of their papers we have counts for
26 papers
Entanglement-enhanced dual-comb spectroscopy
Haowei Shi, Zaijun Chen, Scott E. Fraser +3
Dual-comb interferometry harnesses the interference of two laser frequency combs to provide unprecedented capability in spectroscopy applications. In the past decade, the state-of-…
Integrated photonics on thin-film lithium niobate
Di Zhu, Linbo Shao, Mengjie Yu +12
Lithium niobate (LN), an outstanding and versatile material, has influenced our daily life for decades: from enabling high-speed optical communications that form the backbone of th…
Reconfigurable electro-optic frequency shifter
Yaowen Hu, Mengjie Yu, Di Zhu +7
Here we demonstrate an on-chip electro-optic frequency shifter that is precisely controlled using only a single-tone microwave signal. This is accomplished by engineering the densi…
Integrated microwave acousto-optic frequency shifter on thin-film lithium niobate
Linbo Shao, Neil Sinclair, James Leatham +5
Electrically driven acousto-optic devices that provide beam deflection and optical frequency shifting have broad applications from pulse synthesis to heterodyne detection. Commerci…
An integrated lithium-niobate electro-optic platform for spectrally tailored dual-comb spectroscopy
Amirhassan Shams-Ansari, Mengjie Yu, Zaijun Chen +4
A high-resolution broad-spectral-bandwidth spectrometer on a chip would create new opportunities for gas-phase molecular fingerprinting, especially in environmental sensing. A reso…
Chip-Based Lithium-Niobate Frequency Combs
Mengjie Yu, Cheng Wang, Mian Zhang +1
Lithium niobate is an excellent photonic material with large and nonlinearities. Recent breakthroughs in nanofabrication technology have enabled ultralow-loss nanophoto…
Raman lasing and soliton modelocking in lithium-niobate microresonators
Mengjie Yu, Yoshitomo Okawachi, Rebecca Cheng +4
The recent advancement in lithium niobate on insulator (LNOI) technology is revolutionizing the optoelectronic industry as devices of higher performance, lower power consumption, a…
Turn-key, high-efficiency Kerr comb source
Bok Young Kim, Yoshitomo Okawachi, Jae K. Jang +6
We demonstrate an approach for automated Kerr comb generation in the normal group-velocity dispersion (GVD) regime. Using a coupled-ring geometry in silicon nitride, we precisely c…
Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators
Linbo Shao, Mengjie Yu, Smarak Maity +8
We demonstrate conversion of up to 4.5 GHz-frequency microwaves to 1500 nm-wavelength light using optomechanical interactions on suspended thin-film lithium niobate. Our method uti…
Visible nonlinear photonics via high-order-mode dispersion engineering
Yun Zhao, Xingchen Ji, Bok Young Kim +11
Over the past decade, remarkable advances have been realized in chip-based nonlinear photonic devices for classical and quantum applications in the near- and mid-infrared regimes.…
Supercontinuum generation in angle-etched diamond waveguides
Amirhassan Shams-Ansari, Pawel Latawiec, Yoshitomo Okawachi +8
We experimentally demonstrate on-chip supercontinuum generation in the visible region in angle etched diamond waveguides. We measure an output spectrum spanning 670 nm to 920 nm in…
Coherent two-octave-spanning supercontinuum generation in lithium-niobate waveguides
Mengjie Yu, Boris Desiatov, Yoshitomo Okawachi +2
We demonstrate coherent supercontinuum generation (SCG) in a monolithically integrated lithium-niobate waveguide, under the presence of second- and third-order nonlinear effects. W…
Monolithic photonic circuits for Kerr frequency comb generation, filtering and modulation
Cheng Wang, Mian Zhang, Rongrong Zhu +2
Microresonator Kerr frequency combs, which rely on third-order nonlinearity (), are of great interest for a wide range of applications including optical clocks, pulse shap…
Gas-phase microresonator-based comb spectroscopy without an external pump laser
Mengjie Yu, Yoshitomo Okawachi, Chaitanya Joshi +3
We present a novel approach to realize microresonator-comb-based high resolution spectroscopy that combines a fiber-laser cavity with a microresonator. Although the spectral resolu…
Counter-rotating cavity solitons in a silicon nitride microresonator
Chaitanya Joshi, Alexander Klenner, Yoshitomo Okawachi +5
We demonstrate the generation of counter-rotating cavity solitons in a silicon nitride microresonator using a fixed, single-frequency laser. We demonstrate a dual 3-soliton state w…
Coherent, directional supercontinuum via cascaded dispersive wave generation
Yoshitomo Okawachi, Mengjie Yu, Jaime Cardenas +3
We demonstrate a novel approach to producing coherent, directional supercontinuum via cascaded dispersive wave generation. By pumping in the normal group-velocity dispersion regime…
Microresonator-based high-resolution gas spectroscopy
Mengjie Yu, Yoshitomo Okawachi, Austin G. Griffith +2
In recent years, microresonator-based optical frequency combs have created up opportunities for developing a spectroscopy laboratory on a chip due to its broadband emission and hig…
Competition between Raman and Kerr effects in microresonator comb generation
Yoshitomo Okawachi, Mengjie Yu, Vivek Venkataraman +5
We investigate the effects of Raman and Kerr gain in crystalline microresonators and determine the conditions required to generate modelocked frequency combs. We show theoretically…
Low-Loss Silicon Platform for Broadband Mid-Infrared Photonics
Steven A. Miller, Mengjie Yu, Xingchen Ji +4
Broadband mid-infrared (mid-IR) spectroscopy applications could greatly benefit from today's well-developed, highly scalable silicon photonics technology; however, this platform la…
Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion
Jae K. Jang, Yoshitomo Okawachi, Mengjie Yu +4
We experimentally and theoretically investigate the dynamics of microresonator-based frequency comb generation assisted by mode coupling in the normal group-velocity dispersion (GV…
Silicon-chip-based mid-infrared dual-comb spectroscopy
Mengjie Yu, Yoshitomo Okawachi, Austin G. Griffith +3
On-chip spectroscopy that could realize real-time fingerprinting with label-free and high-throughput detection of trace molecules is one of the 'holy grails" of sensing. Such minia…
Breather soliton dynamics in microresonators
Mengjie Yu, Jae K. Jang, Yoshitomo Okawachi +6
The generation of temporal cavity solitons in microresonators results in low-noise optical frequency combs which are critical for applications in spectroscopy, astronomy, navigatio…
Modelocked mid-infrared frequency combs in a silicon microresonator
Mengjie Yu, Yoshitomo Okawachi, Austin G. Griffith +2
Mid-infrared (mid-IR) frequency combs have broad applications in molecular spectroscopy and chemical/biological sensing. Recently developed microresonator-based combs in this wavel…
Raman-assisted coherent, mid-infrared frequency combs in silicon microresonators
Austin G. Griffith, Mengjie Yu, Yoshitomo Okawachi +4
We demonstrate the first low-noise mid-IR frequency comb source using a silicon microresonator. Our observation of strong Raman scattering lines in the generated comb suggests that…