Asymmetric optical links using monolithic III-nitride diodes

Wang, Linning; Li, Xin; Gao, Xumin; Jia, Bolun; Guan, Qı; Ye, ZiQi; Fu, Kang; Jin, Ruixue; Wang, Yongjin

doi:10.1364/ol.415007

Cited by 13 publications

(7 citation statements)

References 31 publications

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“…2(a) and 2(b), and the dominant EL peak is measured at approximately 470.3 nm and FWHM of 19.3 nm at an injection current of 5 mA of the sample with a filter. Compared to our previously reported work with normal LEDs [20] , the device presents a red shifted central wavelength and similar turn on voltage. More interestingly, the back filter has no obvious influence on the EL properties (I-V or peak wavelength) of the device.…”

Section: Resultsmentioning

confidence: 44%

Self-filtering illumination source and application in fluorescence imaging

et al. 2023

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To date, fluorescence imaging systems have all relied on at least one beam splitter (BS) to ensure the separation of excitation light and fluorescence. Here, we reported SiO 2 =TiO 2 multi-layer long pass filter integrated GaN LED. It is considered as the potential source for imaging systems. Experimental results indicate that the GaN LED shows blue emission peaked at 470.3 nm and can be used to excite dye materials. Integrating with a long pass filter (550 nm), the light source can be used to establish a real-time fluorescence detection for dyes that emit light above 550 nm. More interestingly, with this source, a real-time imaging system with signature words written with the dyes, such as 'N J U P T', can be converted into CCD images. This work may lead to a new strategy for integrating light sources and BS mirrors to build mini and smart fluorescence imaging systems.

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Section: Resultsmentioning

confidence: 44%

Self-filtering illumination source and application in fluorescence imaging

et al. 2023

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“…Therefore, a bidirectional communication system is able to be established using a pair of identical QWDs, wherein one diode of the pair sends information and the other detects the incoming light encoded with data. 26 , 27 Combining transmission and reception capabilities into a single QWD would allow miniaturized and compact architectures and reduce material consumption.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The spectral emission–detection overlap is clearly observed, enabling the QWD with the capability to absorb light at wavelengths matching those of its own emission profile. Therefore, a bidirectional communication system is able to be established using a pair of identical QWDs, wherein one diode of the pair sends information and the other detects the incoming light encoded with data. , Combining transmission and reception capabilities into a single QWD would allow miniaturized and compact architectures and reduce material consumption.…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental Demonstration and Theoretical Analysis of Simultaneous Emission–Detection Phenomenon

2022

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The demand for on-chip multifunctional optoelectronic systems is increasing in the Internet-of-Things era. Spectral emission–detection overlap endows an InGaN/GaN quantum well diode (QWD) with an intriguing capability to detect and modulate light emitted by itself, which is of great interest when merging electronics and photonics together on a single chip for the development of advanced information systems. When biased and illuminated at approximately the same time, the InGaN/GaN QWD can achieve light emission and detection simultaneously. Herein, we experimentally demonstrate the simultaneous emission–detection phenomenon and analyze the irreversibility of spectral emission–detection overlap according to energy diagram theory, which may answer why the QWD can only detect and modulate higher-energy photons than those emitted by itself.

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“…In most cases, the receiver is stably placed on the same plane close to the light source to capture the reflected light carrying biological signals and convert them into electrical ones. [ 6,7 ] In this case, skin, subcutaneous tissue, and arterial blood can form modulating retro‐reflectors (MRRs), [ 8 ] which normally couple passive optical retroreflectors with electro‐optic modulators. When light emitted from transmitter propagates into the skin, part of the light is transmitted through or reflected by skin and tissue, and the rest is absorbed by vascular bed.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized III‐Nitride Asymmetric Optical Link for the Monitoring of Vascular Heart Rate and Cardiac‐Related Pulse Activity

Yan

Gao

et al. 2021

Adv Eng Mater

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Multifunctioning InGaN/GaN multi‐quantum well (MQW) diodes can transmit and detect light separately. In particular, MQW diodes have spectral overlap between electroluminescence (EL) and responsivity, conferring the unique ability to detect light emitted by another device sharing an identical MQW structure. Herein, a III‐nitride transmitter and a receiver on a single chip are monolithically integrated, which can establish an asymmetric optical link and significantly reduce material and processing costs. By attaching the chip to the skin with the transmitter emitting toward it, the device can monitor cardiac activity. Heart pulses change blood volume of the vascular bed, which modulates the reflected light. The receiver absorbs that light and converts it into electrical signals. Finally, by integrating a programmed circuit, the biological signals are analyzed. Herein, a feasible approach to monitor heart rate and cardiac‐related pulse information simultaneously is provided.

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Asymmetric optical links using monolithic III-nitride diodes

Cited by 13 publications

References 31 publications

Self-filtering illumination source and application in fluorescence imaging

Self-filtering illumination source and application in fluorescence imaging

Experimental Demonstration and Theoretical Analysis of Simultaneous Emission–Detection Phenomenon

Miniaturized III‐Nitride Asymmetric Optical Link for the Monitoring of Vascular Heart Rate and Cardiac‐Related Pulse Activity

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