Eui-Hyoun Ryu

A Universal Approach to Enhancing Silicon Hot‐Carrier Photodetectors for CMOS‐Compatible SWIR Imaging (Adv. Sci. 38/2026)

Eui-Hyoun Ryu, Hyun Woo Ko, Sunghyun Hwang, Nayeon Kim et autres

Silicon Hot-Carrier Photodetectors Silicon hot-carrier photodetectors offer a CMOS-compatible pathway toward SWIR imaging applications but typically suffer from low quantum efficiency. The image illustrates how the proposed quasi-generalized antireflection coating enhances optical absorption, leading to improved quantum efficiency. More details can be …

Hyperspectral imaging enabled by air-gap cavity tunable filter (Conference Presentation)

Nayeon Kim, Sunghyun Hwang, Eui-Hyoun Ryu, Ji-Hwan Son et autres

We demonstrate a hyperspectral imaging system employing an air-gap cavity as a wavelength-tunable filter. Unlike conventional Fabry-Pérot filters, the air-gap cavity filter offers a significantly broader tuning range, spanning from visible to infrared. Its simple design and wide spectral coverage provide a …

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A Universal Approach to Enhancing Silicon Hot‐Carrier Photodetectors for CMOS‐Compatible SWIR Imaging

Eui-Hyoun Ryu, Hyun Woo Ko, Sunghyun Hwang, Nayeon Kim et autres

Silicon hot-carrier photodetectors offer a CMOS-compatible pathway for short-wavelength infrared (SWIR) detection, yet their practical deployment in imaging systems has been constrained by intrinsically low quantum efficiency. Here, we present a universal approach to enhance the quantum efficiency of silicon hot-carrier photodetectors …

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Ultrastrong Plasmon–Phonon Coupling Enabled by Acoustic Graphene Plasmons

I.-K. Lee, Fernando de León‐Pérez, Daehan Yoo, Eui-Hyoun Ryu et autres

Vibrational ultrastrong coupling (USC) opens new opportunities for controlling chemical reactivity and advancing mid-infrared nanophotonics. Here, we demonstrate USC in an ultrathin polar dielectric using acoustic graphene plasmons (AGPs). Unlike conventional graphene plasmons, whose coupling weakens with a reduced dielectric thickness, AGPs …

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SWIR-transparent silicon hot-carrier photodetector for unobstructed real-time laser power monitoring

Eui-Hyoun Ryu, Sunghyun Hwang, Na Yeon Kim, Jihwan Song et autres

Optically transparent photodetectors are becoming essential components in next-generation photonic technologies such as augmented reality and light-field imaging. While transparent photodetectors have been extensively developed for the visible spectrum, extending this capability to the short-wavelength infrared (SWIR) regime remains a significant challenge. …

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Persistent and reliable electrical properties of ReS2 FETs using PMMA encapsulation

Eui-Hyoun Ryu, Miri Seo, Yugyeong Je, HyunJeong Jeong et autres

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