Enhancement of emission of InGaN/GaN multiple-quantum-well nanorods by coupling to Au-nanoparticle plasmons

Xing, Jieying; Chen, Yinsong; Liu, Yuebo; Liang, Jiezhi; Chen, Jie; Ren, Yuan; Han, Xiaobiao; Zhong, Changming; Yang, Hang; Huang, Dejia; Hou, Yaqian; Wu, Zhisheng; Liu, Yang; Zhang, Baijun

doi:10.1063/1.5022454

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…The LSPR produce strong evanescent electrical field which can enhance light absorption or light emission in adjacent semiconductor or chemical or biological environment. This is why LSPR in metallic nanoparticles in last two decades have been applying to enhance absorption in conventional or organic photovoltaics [1][2][3] or to enhance light emission in light-emitting device 4,5 . Strong evanescent field in metallic nanoparticles can enhance the emission in weakly fluorescent biomolecules such that it also has been applying in biological sensing [6][7][8][9] .…”

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confidence: 99%

Optical absorption in array of Ge/Al-shell nanoparticles in an Alumina matrix

Despoja

Basioli

Parramon

et al. 2020

Sci Rep

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The absorption spectra in array of Ge, Al and Ge/Al-shell nanoparticles immersed in alumina (Al 2 o 3) matrix is calculated in framework of ab initio macroscopic dielectric model. It is demonstrated that absorption is strongly enhanced when germanium nanospheres are encapsulated by Al-shell. Two absorption peaks, appearing in the spectra, correspond to low energy ω + and high energy ω − plasmons which lie in visible and ultraviolet frequency range, respectively. It is demonstrated that in Ge/Al-shell composite the ω + plasmon exists only because quantum confinement effect which provides larger Ge band gap (Δ ~ 1.5 eV) and thus prevent decay of ω + plasmon to continuum of interband electron-hole excitation in semiconducting core. Absorption in visible frequency range enhances additional 3 times when alumina is replaced by large dielectric constant insulator, such as SiC, and additional 6 times when Ge core is replaced by wide band-gap insulator, such as Si 3 n 4. Strong enhancement of optical absorption in visible frequency range make this composites suitable for optoelectronic application, such as solar cells or light emitting devices. The simulated plasmon peaks are brought in connection with peaks appearing in ellipsometry measurements.

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confidence: 99%

Optical absorption in array of Ge/Al-shell nanoparticles in an Alumina matrix

Despoja

Basioli

Parramon

et al. 2020

Sci Rep

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“…Young S [24][25][26][27] team used Au nanoparticles improved ZnO UV photodetectors, obtained responsivity and I ph /I dark reached 14.8 mA/W, 1320, respectively. Xing J [28] coupled InGaN/GaN multiple quantum well nanorods with localized surface plasmons of gold nanoparticles, and time-resolved photoluminescence measurements confirmed that the emission enhancement originated from the coupling. Zhai S Q [29] demonstrated a normal-incidence quantum cascade detector excited by surface plasmon resonance using Au 2D hole arrays, and the results showed that Au 2D hole arrays resulted in enhanced quantum efficiency at most measurement temperatures, with a quantum efficiency enhanced 69% at 140 K. Dixit T [30] reported a device using Au nanoparticles sandwiched between two ZnO layers, which is suitable for UV-A, UV-B and UV-C detection, the device exhibits a high UV-to-visible rejection ratio of 1.32×10 3 and a UV-to-NIR rejection ratio of 8.79×10 3 , with a photoresponsivity of 10.64 A/W (λ = 315 nm).…”

Section: Introductionmentioning

confidence: 91%

The Gold Nanoparticles Enhanced ZnO/GaN UV Detector

Song

Dai

et al. 2022

IEEE J. Electron Devices Soc.

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Ultraviolet detectors can be used in ultraviolet disinfection, missile guidance and short-wave communication fields. Here we have grown GaN (002) film by chemical vapor deposition (CVD), through depositing 100 nm ZnO film as buffer layers on sapphire substrates by magnetron sputtering. Using Ni as the electrode, the metal-semiconductor-metal (MSM) ultraviolet (UV) detector was prepared. The device dark current, photocurrent and UV on/off current ratio were 5.19×10 -9 A, 2.52×10 -7 A and 54, under 2V bias. Then, using Au nanoparticles as plasmons, the photocurrent and photoresponsivity of the device were increased by 5.32 times and 5.25 times, respectively, and the UV on/off current ratio reached 176. The photoresponsivity of the device reaches the maximum value 0.42A/W at 370nm, the response time and relaxation time reach 0.1s and 0.12s, respectively.

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“…It is well known that another surface plasmon can be induced when the confined carriers in QWs resonate with the oscillating electrons in the metal within a near-field distance . SPR excitation by the QW–metal coupling has been utilized to enhance the quantum efficiencies of InGaN-based LEDs, − as well as to detect localized refractive index variation . In the setup for Figure b, a similar plasmonic effect could be prompted considering the fact that the abundant electrons in the multiple QWs are only ∼1 nm from the Au NPs.…”

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confidence: 99%

Controlling the Electron Concentration for Surface-Enhanced Raman Spectroscopy

Nguyen

Chang

et al. 2021

ACS Photonics

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Controlling the intensity of surface-enhanced Raman spectroscopy (SERS) in a systematic manner is the key to understanding, and even predicting, the dynamics of the imposing phenomenon. It has been known that the SERS signal is intensified by resonant electron oscillation at the hot spots. To date, few of the reported SERS techniques are capable of confining the contributive charges with a controlled concentration and position. Here, we systematically increase the carrier population a few nanometers below the hot spots, aiming to quantify the dependence of SERS intensity on surface charge concentration. The work is accomplished by InGaN quantum wells (QWs) grown by metal–organic chemical vapor deposition (MOCVD). Characterizing the QW wafers with capacitance–voltage curves and the correspondent Raman spectra, we observe a linear logarithmic dependence of SERS intensity on the electron concentration. The intensity is further boosted by nanostructuring the QW surface with adjusted MOCVD conditions.

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Enhancement of emission of InGaN/GaN multiple-quantum-well nanorods by coupling to Au-nanoparticle plasmons

Cited by 6 publications

References 30 publications

Optical absorption in array of Ge/Al-shell nanoparticles in an Alumina matrix

Optical absorption in array of Ge/Al-shell nanoparticles in an Alumina matrix

The Gold Nanoparticles Enhanced ZnO/GaN UV Detector

Controlling the Electron Concentration for Surface-Enhanced Raman Spectroscopy

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