Lasing and Steering an integrated Vortex Laser

Bahari, Babak; Valini, Felipe; Lepetit, Thomas; Tellez-Limon, Ricardo; Park, Jun‐Hee; Kodigala, Ashok; Fainman, Yeshaiahu; Kanté, Boubacar

doi:10.1364/fio.2017.ftu4a.2

Cited by 4 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The flexibility that BICs have introduced to the design and realizations of high-Q resonances in nanophotonic systems has positioned them to benefit the nonlinear photonics community immensely. BICs have thus far been utilized to boost a plethora of nonlinear effects, including the optical Kerr effect, [57,58] lasing action, [18,55,[59][60][61][62][63][64] second-and third-harmonic generation, [56,[65][66][67][68][69][70] four-wave mixing, [65] dynamical nonlinear image tuning, [71] and many more. This section will shed a brief light on the latest advancements pertinent to the role of BICs in intensifying nonlinearities in nanophotonic platforms.…”

Section: Bics For Enhancing Optical Nonlinearitiesmentioning

confidence: 99%

“…[18,55,[59][60][61][62] In addition, due to the nonzero topological charges associated with BICs, the laser emission at the BIC points is naturally a vector beam. [63,64] While the first experimental demonstration of BICs in optical structures did not take place until around a decade ago, [4,25,27] BIC-based lasers had been reported long before that. A closer look at many distributed feedback and surface-emitting lasers indicates that they operate at the band edge (i.e., the Γ point, which is a symmetry protected BIC).…”

Section: Bic-based Lasersmentioning

confidence: 99%

“…The structure is optically pumped (yellow beam) and generates a vortex beam at a controllable angle (blue beam). [ 63 ] d–g) Measured k‐space images of the emission from lasers shown in (c) with different radii. The images show that the emission angle of the lasing increases as the radius of the holes decreases from d) 250 nm, to e) 240 nm, then to f) 225, and finally to g) 190 nm demonstrating beaming of the lasing emission.…”

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

“…(c)–(g) are adapted with permission. [ 63 ] Copyright 2020, Babak Bahari et al h) Vortex lasing from a perovskite metasurface. [ 64 ] When the array is pumped with one beam, a donut‐shaped lasing emission is observed (inset top).…”

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

“…Additionally, BICs have been exploited to demonstrate integrated and steerable‐by‐design vortex lasers, [ 63 ] Figure 2c. In that case, BICs carrying a non‐zero topological charge have been controlled by the topology of the lasing structure.…”

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

See 4 more Smart Citations

Photonic Bound States in the Continuum: From Basics to Applications

Azzam

Kildishev

2020

Advanced Optical Materials

327

141

View full text Add to dashboard Cite

In theory, BICs are dark states with infinite radiative lifetime and generally require at least one dimension of the structure extending to infinity. [6] Similar conditions can also be obtained in localized systems of finite extent when the permittivity approaches zero. [5,11] However, in practice, due to the finite extent of structures, material absorption, and other external perturbations, BICs collapse to a Fano resonance with a limited radiative Q factor. Such resonances are known as quasi-BIC and they have been used to obtain very high Q resonances in numerous photonic systems to date. [6,8,12] Even though practical implementations of BICs are limited to quasi-BIC, in the literature, as well as in this review, quasi-BIC are commonly referred to as BICs. Another type of high-Q resonances called near-BIC is obtained in the vicinity of the BIC through detuning the system from the BIC regime. [9,13,14] Near-BICs can be explained by the Theory of Resonance Reactions by Fonda [13,14] as a bound state can exist in the continuum at an energy where some channels are open even when the open and closed channels are strongly coupled. If the Hamiltonian of the system differs slightly from the one that can produce such a bound state, a sharp resonance appears in all scattering and reaction cross-sections. Near-BIC resonances can be obtained over an interval of values of a specific parameter of the system, unlike BICs that are generally achieved at a single value of the parameter. [9,15] This is of importance for practical systems as it provides stability to fabrication errors and other imperfections. [12] It is also worth mentioning that the total Q factor (Q t) realizable through BICs is generally limited by the material loss. While the radiative Q-factor (Q r) at BICs can diverge, the non-radiative Q-factor (Q nr) is limited by material absorption and its inhomogeneous broadening, scattering from the structural disorder, and in-plane lateral leakage. It is therefore, important to have an accurate distinction between Q r and Q nr and account for non-radiative processes as generally the main contributors to the total Q." 1.2. BIC Types and Formation Mechanisms Since the time of initial prediction of BICs in photonics, they have been realized in numerous geometrical systems, including gratings, waveguides, metasurfaces, and photonic crystals. [4,7,9,16-24] Such a broad diversity of photonic systems supports different types of BICs that originate from various physical mechanisms. We will briefly highlight the different The introduction of bound states in the continuum (BICs) to photonics has revolutionized the way cavity design and light-matter interactions are thought about in general. BICs can have very high quality factors, even in open structures where access to radiation is permissible. Now, BICs found applications in a large class of areas, including nonlinear enhancement, coherent light generation, sensors, filters, integrated circuits, and many others. In this review, the different types of BICs in photonic systems,...

show abstract

Section: Bics For Enhancing Optical Nonlinearitiesmentioning

confidence: 99%

Section: Bic-based Lasersmentioning

confidence: 99%

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

See 3 more Smart Citations

Photonic Bound States in the Continuum: From Basics to Applications

Azzam

Kildishev

2020

Advanced Optical Materials

327

141

View full text Add to dashboard Cite

show abstract

Solution‐Processed Perovskite Quantum Dot Quasi‐BIC Laser from Miniaturized Low‐Lateral‐Loss Cavity

Xing,

Chen,

Wang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Laser devices produced via solution‐processed perovskite quantum dots (QDs) offer broad spectral tunability as well as ease of fabrication. Utilizing quasi‐bound states in the continuum (quasi‐BIC) modes, solution‐processed QD laser devices have been demonstrated with a nanostructure coated in a thin‐film gain media configuration. However, light leakage through thin‐film guiding from the cavity side edges becomes more pronounced when shrinking the cavity size, posing challenges for the miniaturization of quasi‐BIC‐based lasers. Here, the fabrication of well‐defined patterns of QDs via a solution process allows them to take advantage of the pattern edges to reduce losses through the cavity edges. A single‐mode BIC laser is reported by using CsPbBr3 QDs with a narrow linewidth of ≈0.1 nm. Importantly, a miniaturized quasi‐BIC laser is realized with a device size as small as 10 × 10 µm2, making it the smallest among existing solution‐processed BIC lasers. This work provides a strategy for developing ultra‐compact BIC lasers via solution‐processed gain media.

show abstract

Photonic Bound States in the Continuum in Si Structures with the Self‐Assembled Ge Nanoislands

Dyakov

Stepikhova

Bogdanov

et al. 2021

Laser & Photonics Reviews

View full text Add to dashboard Cite

Germanium self-assembled nanoislands and quantum dots are very prospective for CMOS-compatible optoelectronic integrated circuits but their photoluminescence (PL) intensity is still insufficient for many practical applications. Here, it is demonstrated experimentally that the PL of Ge nanoislands in silicon photonic crystal slabs (PCS) with hexagonal lattice can be dramatically enhanced due to the involvement in the emission process of the bounds states in the continuum. These high-Q photonic resonances allow to achieve PL resonant peaks with the quality factor as high as 2200 and with the peak PL enhancement factor of more than two orders of magnitude. The corresponding integrated PL enhancement is demonstrated to be more than one order of magnitude. This effect is studied theoretically by the Fourier modal method in the scattering matrix form. The symmetry of the quasi-normal guided modes in the PCS is described in terms of group theory. This work paves the way toward a new class of optoelectronic components compatible with silicon technology.

show abstract

Lasing and Steering an integrated Vortex Laser

Cited by 4 publications

References 5 publications

Photonic Bound States in the Continuum: From Basics to Applications

Photonic Bound States in the Continuum: From Basics to Applications

Solution‐Processed Perovskite Quantum Dot Quasi‐BIC Laser from Miniaturized Low‐Lateral‐Loss Cavity

Photonic Bound States in the Continuum in Si Structures with the Self‐Assembled Ge Nanoislands

Contact Info

Product

Resources

About