Kiwon Moon
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View article: Photonic Molecules via Coupled Thin-Film Lithium Niobate Fabry-Pérot Photonic Crystal Micro-resonators
Photonic Molecules via Coupled Thin-Film Lithium Niobate Fabry-Pérot Photonic Crystal Micro-resonators Open
We demonstrate a photonic molecule platform based on photonic crystal (PhC) Fabry-Pérot micro-resonators on thin-film lithium niobate, featuring standing-wave resonances confined between PhC mirrors. By adjusting the number of PhC unit cel…
View article: High-Q photonic crystal Fabry-Perot micro-resonator in thin-film lithium niobate
High-Q photonic crystal Fabry-Perot micro-resonator in thin-film lithium niobate Open
Thin-film lithium niobate (TFLN) has emerged as a powerful platform for integrated nonlinear and quantum photonics, owing to its strong optical nonlinearities, wide transparency window, and electro- and piezo-optic properties. However, con…
View article: A wide-spectrum mid-infrared electro-optic intensity modulator employing a two-point coupled lithium niobate racetrack resonator
A wide-spectrum mid-infrared electro-optic intensity modulator employing a two-point coupled lithium niobate racetrack resonator Open
Optical intensity modulators (OIMs) are essential for mid-infrared (mid-IR) photonics, enabling applications such as bond-selective molecular sensing, and free-space communications via atmospheric windows. Integrated photonics offers a com…
View article: Fabrication of low‐loss symmetrical rib waveguides based on x‐cut lithium niobate on insulator for integrated quantum photonics
Fabrication of low‐loss symmetrical rib waveguides based on x‐cut lithium niobate on insulator for integrated quantum photonics Open
Lithium niobate on insulator (LNOI) is a promising material platform for applications in integrated quantum photonics. A low optical loss is crucial for preserving fragile quantum states. Therefore, in this study, we have fabricated LNOI r…
View article: Er:LiNbO<sub>3</sub> Quantum Memory Platform Optimized with Dynamic Defect Annealing
Er:LiNbO<sub>3</sub> Quantum Memory Platform Optimized with Dynamic Defect Annealing Open
Lithium niobate (LiNbO 3 ) exhibits poor radiation resistance when conventionally implanted with Er at room temperature. To repair the structural disorder, high‐temperature post‐implantation anneals are typically required; however, such tr…
View article: Spontaneous parametric down-conversion photon pair generation in small footprint X-cut periodically poled lithium niobate micro-resonator
Spontaneous parametric down-conversion photon pair generation in small footprint X-cut periodically poled lithium niobate micro-resonator Open
Spontaneous parametric down-conversion (SPDC) has been crucial for producing non-classical light, such as correlated photon pairs and squeezed states, essential for optical quantum technologies. Recently, thin-film lithium niobate (TFLN)-b…
View article: Hyperband electro-optic modulator based on two-pulley coupled lithium niobate racetrack resonator
Hyperband electro-optic modulator based on two-pulley coupled lithium niobate racetrack resonator Open
Integrated optical modulators (IOMs) are crucial components of on-chip photonic circuits. However, most conventional IOMs are restricted to specific spectral bands. Here, we leveraged the wide transparency window of lithium niobate in conj…
View article: Hyperband electro-optic modulator based on two-pulley coupled lithium niobate racetrack resonator
Hyperband electro-optic modulator based on two-pulley coupled lithium niobate racetrack resonator Open
Integrated optical modulators (IOMs) are crucial components of on-chip photonic circuits. However, most conventional IOMs are restricted to specific spectral bands. Here, we leveraged the wide transparency window of lithium niobate in conj…
View article: THz Reflective Imaging System Utilizing Broadband Homodyne Amplification for Artifact-Free See-Through Imaging
THz Reflective Imaging System Utilizing Broadband Homodyne Amplification for Artifact-Free See-Through Imaging Open
Terahertz (THz) technology offers unique see-through imaging capability for various non-destructive inspection applications. In this work, we implemented a broadband continuous-wave THz imaging system to study technical issues related to t…
View article: Remote N<sub>2</sub>O gas sensing by enhanced 910-m propagation of THz pulses
Remote N<sub>2</sub>O gas sensing by enhanced 910-m propagation of THz pulses Open
We modified our 910-m long path THz system to increase the signal-to-noise ratio (S/N) with a nanostructure plasmonic THz transmitter (Tx) chip and a seven-mirror array reflector with 1 m diameter. When the THz pulse propagates the 910-m d…
View article: Terahertz continuous wave system using phase shift interferometry for measuring the thickness of sub-100-μm-thick samples without frequency sweep
Terahertz continuous wave system using phase shift interferometry for measuring the thickness of sub-100-μm-thick samples without frequency sweep Open
A terahertz continuous wave system is demonstrated for thickness measurement using Gouy phase shift interferometry without frequency sweep. One arm of the interferometer utilizes a collimated wave as a reference, and the other arm applies …
View article: Terahertz radiation using log-spiral-based low-temperature-grown InGaAs photoconductive antenna pumped by mode-locked Yb-doped fiber laser
Terahertz radiation using log-spiral-based low-temperature-grown InGaAs photoconductive antenna pumped by mode-locked Yb-doped fiber laser Open
We demonstrate a terahertz (THz) radiation using log-spiral-based low-temperature-grown (LTG) InGaAs photoconductive antenna (PCA) modules and a passively mode-locked 1030 nm Yb-doped fiber laser. The passively mode-locked Yb-doped fiber l…
View article: SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System
SOA-Integrated Dual-Mode Laser and a PIN-Photodiode for Compact CW Terahertz System Open
We designed and fabricated a semiconductor optical amplifier-integrated dual-mode laser (SOA-DML) as a compact and widely tunable continuous-wave terahertz (CW THz) beat source, and a pin-photodiode (pin-PD) integrated with a log-periodic …
View article: Bias field tailored plasmonic nano-electrode for high-power terahertz photonic devices
Bias field tailored plasmonic nano-electrode for high-power terahertz photonic devices Open
Photoconductive antennas with nano-structured electrodes and which show significantly improved performances have been proposed to satisfy the demand for compact and efficient terahertz (THz) sources. Plasmonic field enhancement was previou…
View article: Frequency modulation based continuous-wave terahertz homodyne system
Frequency modulation based continuous-wave terahertz homodyne system Open
In this study, inspired by the frequency-modulated continuous-wave (FMCW) method, an operation scheme of continuous-wave (CW) terahertz (THz) homodyne system is proposed and evaluated. For this purpose, we utilized the fast and stable wave…