Hydrogenated Zinc Oxide as an Alternative Low-Loss Plasmonic Material with Fano Resonance in Near-IR

Abstract

Low-loss plasmonic materials are of great importance due to their use in many photonic and optoelectronic devices. Doped transparent conducting oxides (TCOs) are potential alternatives to metallic plasmonic materials owing to their reduced losses and the tunability of their complex dielectric function. In this work, first-principles calculations were employed to reveal the role of interstitial hydrogen (H i ) doping in zinc oxide (ZnO) to achieve low losses and excite surface plasmon polaritons (SPPs). Three different concentrations of H i doping (4.16, 6.25, 8.33%) were investigated. The results show that an H i concentration as low as 4.16% achieves excellent low-loss plasmonic behavior. The fitted Drude damping parameter at 4.16% H i doping was found to be lower than that reported for the same aluminum (Al) concentration. Finally, we numerically show that Fano resonance can be excited in near-infrared (IR) using a simple symmetric cylinder with an air hole made of hydrogen-doped ZnO placed on a pure ZnO substrate, revealing its potential use in numerous applications.

Tailoring the Optical Properties of Zinc Oxide via Bismuth Doping and Codoping Strategies: From Birefringence to Metallicity

“…Beyond 3 μm, the in-plane index n x , y is not as high as in the case of no O v but is still greater than 3. Moreover, codoping with Al Zn and H i causes similar behavior, supporting our claim in a previous work that interstitial H doping and substitutional Al doping in ZnO are correlated . Beyond 2.6 μm, the in-plane index n x , y is approximately 1.5 times larger than that of 6Bi.…”

“…Moreover, codoping with Al Zn and H i causes similar behavior, supporting our claim in a previous work that interstitial H doping and substitutional Al doping in ZnO are correlated. 20 Beyond 2.6 μm, the in-plane index n x,y is approximately 1.5 times larger than that of 6Bi. It is also worth mentioning that the out-of-plane index n z becomes greater than 3 while maintaining the birefringence.…”

“…17−19 Also, transparent conducting oxides have been intensively studied as they are CMOS compatible and their optical properties can be easily tailored. 20,21 Herein, we report Bi-doped ZnO, which behaves as a highindex birefringent material as well as indefinite media with metallic properties depending on the excitation wavelength and the doping concentration. With the desired bismuth properties, we investigated the effects of its use as a dopant in three metal oxides using density functional theory (DFT).…”

“…Moreover, MoS 2 , WS 2 , and other transition-metal dichalcogenides possess high index and high birefringence in the UV–vis region . In addition, bismuth is known to have high index in IR and plasmonic properties in UV and has been used in many applications. − Also, transparent conducting oxides have been intensively studied as they are CMOS compatible and their optical properties can be easily tailored. , …”

Photoactivation of peroxymonosulfate (PMS) over a CuO–ZnO p–n heterojunction for the selective C2 trimerization of indoles

“…From the plot of partial density of states (PDOS), it was observed that the metal 3d and O 2p-orbitals contributed maximum near the Fermi level for both CuO 25 and ZnO 26 (Fig. 3a and b).…”