Design of 2D GaN photonic crystal based on hole displacement for L3 cavity

Zamani, Nur Dalila Mohd; Nawi, Mohd Nuriman; Berhanuddin, Dilla Duryha; Majlis, Burhanuddin Yeop; Zain, Ahmad Rifqi Md

doi:10.1177/1847980420966887

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…The simulated Q factors of these modes are ∼(3–4) × 10 4 . While the Q values of these merged moiré patterns are high over the Brillouin zone and are comparable to other simulated Q’s of traditional GaN photonic crystals, in general they are lower than for their constitutive, unmerged monolayer patterns . This is intuitively reasonable, as the increased area of holes in the merged moiré pattern presents a greater number of surface–air interfaces and therefore greater coupling of the cavity fields to the external environment (see Figure a,b).…”

Section: Resultssupporting

confidence: 74%

GaN Magic Angle Laser in a Merged Moiré Photonic Crystal

Raun,

Tang,

et al. 2023

ACS Photonics

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We demonstrate optically pumped blue lasing at room temperature in a merged moiré photonic crystal fabricated out of gallium nitride with embedded, fragmented quantum wells. Lasing occurs at two closely spaced wavelengths of 450 and 451 nm, matched to simulated flat bands induced by the moiré superlattice. Both thresholds occur at 30 μJ/cm2. Light in–light out curves were taken at both room temperature and 77 K across different gain materials, including fragmented quantum wells, continuous quantum wells, and quantum dots. Lasing was observed only at room temperature in fragmented quantum well devices, suggesting the importance of gain material carrier dynamics in unconventional laser cavities like the moiré design explored. These insights and the experimental validation of moiré simulations in a previously unexplored III–V material indicate promise toward a new kind of efficient, tunable laser.

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Section: Resultssupporting

confidence: 74%

GaN Magic Angle Laser in a Merged Moiré Photonic Crystal

Raun,

Tang,

et al. 2023

ACS Photonics

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“…Knowing that among the optical sensors there is one that is used in the localization of blood fluid glucose with the purpose of shielding against electromagnetic interference (EMI) with light, high sensitivity and high accuracy [2]. Now, in order to develop ultra-compact optical sensors, different nano-and micrometer photonic structures have been used, such as optical decoders based on photonic crystal (PhC) [3], Mach-Zehnder interferometers (MZI) [4],electro-optical encoders based on PhC [5], surface plasmon resonators [6], micro-ring resonators [7,8], ultra-compact ultra-fast comparator based on PhC [9] and photonic crystal (PhC) cavities [10]. In order to use them as sensors, it is desirable to have PhC resonators with intense light/matter interaction between analyst and optical fields.…”

Section: Introductionmentioning

confidence: 99%

Study, simulation and detection of glucose concentrations through a biochip based on two-dimensional photonic crystals

Bella,

Ghoumazi,

Slimani

et al. 2023

Optica Applicata

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A biochip is made from a two-dimensional photonic crystal waveguide and a rhombus shape that acts as a resonator. This biochip is a sensor that can detect different concentrations of glucose with amounts of 10, 20 and 60% in water. Here, we studied and simulated the concentrations of glucose, which have a refractive index n of 1.3477, 1.3635 and 1.4394, respectively. To identify these quantities, we have proposed a square lattice structure formed by silicon rods with a n = 3.46. With the help of these dielectric rods immersed in the air, it was possible to analyze the detection characteristics. Our results are examined according to COMSOL software by using the PWE method and the finite element method in order to have the PBG and which helped us to create the structure and extract the propagation at resonance, the field norm, the total energy density (TED), the power flow norm (PFN), the transmission and the sensitivity. The concentrations of glucose in water answered yes to the variations for each of the E-field, the TED, the PFN and the sensitivity. These variations are due to the radius r and refractive index n of each concentration used. This structure can help with diabetes self-monitoring.

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“…However, critical aspects related to their design and fabrication still need to be addressed. 1 In this Special Collection, among the articles in the nanophotonics field, the article titled "Design of 2D GaN photonic crystal based on hole displacement for L3 cavity" by Nur Dalila Mohd Zamani et al 2 discusses about the 2D GaN Photonic Crystal that has the ability in controlling the propagation of light. The authors from university Kebangsaan Malaysia studied a 2D photonic crystal cavity side holes in GaN-AlN-sapphire layer that would improve the quality factor up to 22,500 at 152-nm cavity distance.…”

mentioning

confidence: 99%