Self-Suspended Microdisk Lasers with Mode Selectivity by Manipulating the Spatial Symmetry of Whispering Gallery Modes

Noh, Wanwoo; Dupré, Matthieu; Ndao, Abdoulaye; Kodigala, Ashok; Kanté, Boubacar

doi:10.1021/acsphotonics.8b01218

Cited by 22 publications

(11 citation statements)

References 41 publications

(77 reference statements)

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“…Single-mode emission can be achieved by supressing the side modes and breaking the symmetry of the devices: One way to achieve single-mode lasing in microdisk cavities was demonstrated using suspended cavities with a proper choice of bridges manipulating the spatial symmetry . Another strategy involves using grooves or nanoantennae. , Recently, nanoantennae have also been combined with high-Q cavities containing quantum dots, leading to hybrid systems where emission enhancements exceed those of a bare cavity and allow for tuning the bandwidth. , These demonstrations show the strong potential of nanoantennae for single-photon devices and toward strongly coupled systems .…”

Section: Introductionmentioning

confidence: 99%

Single-Mode Emission in InP Microdisks on Si Using Au Antenna

et al. 2022

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An important building block for on-chip photonic applications is a scaled emitter. Whispering gallery mode cavities based on III–Vs on Si allow for small device footprints and lasing with low thresholds. However, multimodal emission and wavelength stability over a wider range of temperature can be challenging. Here, we explore the use of Au nanorod antennae on InP whispering gallery mode lasers on Si for single-mode emission. We show that by proper choice of the antenna size and positioning, we can suppress the side modes of a cavity and achieve single-mode emission over a wide excitation range. We establish emission trends by varying the size of the antenna and show that the far-field radiation pattern differs significantly for devices with and without antenna. Furthermore, the antenna-induced single-mode emission is dominant from room temperature (300 K) down to 200 K, whereas the cavity without an antenna is multimodal and its dominant emission wavelength is highly temperature-dependent.

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Section: Introductionmentioning

confidence: 99%

Single-Mode Emission in InP Microdisks on Si Using Au Antenna

et al. 2022

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“…Such cavity makes use of standing waves to confine the electromagnetic field. Whispering gallery microcavities can be constructed based on spheres, [130] disks or self-suspended disks, [131,132] and rings. [133,134] 3) The 2D photonic crystal microcavities is shown in Figure 5c.…”

Section: Optical Microcavitiesmentioning

confidence: 99%

Infrared Photodetectors Based on 2D Materials and Nanophotonics

Zha

Luo

et al. 2021

Adv Funct Materials

131

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2D materials, such as graphene, transition metal dichalcogenides, black phosphorus, and tellurium, have been demonstrated to be promising building blocks for the fabrication of next-generation high-performance infrared (IR) photodetectors with diverse device architectures and impressive device performance. Integrating IR photodetectors with nanophotonic structures, such as surface plasmon structures, optical waveguides, and optical cavities, has proven to be a promising strategy to maximize the light absorption of 2D absorbers, thus enhancing the detector performance. In this review, the state-of-the-art progress of IR photodetectors is comprehensively summarized based on 2D materials and nanophotonic structures. First, the advantages of using 2D materials for IR photodetectors are discussed. Following that, 2D material-based IR detectors are classified based on their composition, and their detection mechanisms, key figures-of-merit, and the principle of absorption enhancement are discussed using nanophotonic approaches. Then, recent advances in 2D material-based IR photodetectors are reviewed, categorized by device architecture, i.e., photoconductors, van der Waals heterojunctions, and hybrid systems consisting of 2D materials and nanophotonic structures. The review is concluded by providing perspectives on the challenges and future directions of this field.

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“…Wide bandgap semiconductors such as gallium nitride (GaN) have several potential applications in the field of laser devices. 1–4 In recent years, scholars have carried out numerous studies on the laser characteristics of GaN microcavities, hexagonal prisms, spheres, strips, and microdisk lasers that have been reported. 5,6 However, achieving a viable balance between their functionality and laser quality in chemical vapor deposited GaN microcavity is impossible.…”

Section: Introductionmentioning

confidence: 99%