# 2014-4-28 · Abstract: We demonstrated the dual-wavelength simultaneously Q-switched Nd: Lu 2 O 3 laser with a topological insulator Bi 2 Se 3 as the Q-switcher. The continuous-wave Nd:Lu 2 O 3 crystal laser with the slope efficiency of 31% was achieved, and the first Nd:Lu 2 O 3 pulsed laser operation was reported, as far as we know. By using the wavelength-insensitive saturable absorption of topological

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Here, we proposed the topological insulator laser: a photonic topological insulator that lases. The design of such a laser system is highly non-standard - a laser is an open, non-Hermitian (due to gain/loss) and nonlinear (due to saturation) system. The topological insulator laser alters current understanding of the interplay between disorder and lasing, and at the same time opens exciting possibilities in topological physics, such as We demonstrate a nonmagnetic topological insulator laser exhibiting topologically-protected transport. The topological properties of the system give rise to single mode lasing, robustness against fabrication defects, and higher slope efficiencies compared to its trivial counterpart. Schematic of one module of the topological insulator laser in synthetic dimensions. (a) The photonic array consists of modulated rings, in the form of two independent rows connected by two side resonators. The blue and white staggered pattern indicates the different pumping schemes.

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A topological insulator is characterized by a bulk bandgap where topological gapless unidirectional edge states reside. These edge states are robust to any perturbation that does not close the bandgap. Topological insulators are a game-changing class of materials; charged particles can flow freely on their edges and route themselves around defects, but can't pass through their interiors. This 2021-04-14 · Photonic topological insulator laser using III-V semiconductor nanowires. A topological insulator is an extraordinary material - it acts as an electrical bulk insulator that allows an electrical current flow along its surface.

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## 2018-03-16 · Here we demonstrate a nonmagnetic topological insulator laser system exhibiting topologically protected transport in the cavity. Its topological properties give rise to single-mode lasing, robustness against defects, and considerably higher slope efficiencies compared to the topologically trivial counterparts.

Scientists and engineers have created the first electrically-driven 'topological' laser, which has the ability to route light particles around corners -- and to cope with defects in the Studies on three dimensional topological insulators (TIs) such as Bi 2 Te 3, Bi 2 Se 3, and Sb 2 Te 3 over the past decade have been intense due to their unique physical properties and potential applications for spintronics and quantum computing. 1–6 1. M. Z. Hasan and C. L. Kane, “ Colloquium: Topological insulators,” Rev. Mod. Phys.

### In the topological-insulator laser demonstrated by the Technion-CREOL team, laser light goes around the perimeter unobstructed by sharp corners or other local disorder, and eventually exits through the output port. [Image: S. Wittek (CREOL) and M.A. Bandres …

Here we propose an all-dielectric topological insulator laser scheme in telecommunication 2020-1-1 2014-4-28 · Abstract: We demonstrated the dual-wavelength simultaneously Q-switched Nd: Lu 2 O 3 laser with a topological insulator Bi 2 Se 3 as the Q-switcher. The continuous-wave Nd:Lu 2 O 3 crystal laser with the slope efficiency of 31% was achieved, and the first Nd:Lu 2 O 3 pulsed laser operation was reported, as far as we know. By using the wavelength-insensitive saturable absorption of topological 2019-11-11 · Determining optimized conditions necessary to achieve high-quality films by pulsed laser deposition (PLD) for materials with multiple volatile elements is challenging. In this work, we present the optimized growth of epitaxial films of the topological insulator … 2016-1-27 2021-4-12 · The topological insulator crystal was intrinsically achiral, Sun et al. next adjusted the laser beam position on the BSTS flake and BSTS metamaterial to obtain the maximum photocurrent.

16 Mar 2018 Topological insulator lasers are lasers whose lasing mode exhibits topologically protected transport, such that the light propagates along the
27 Oct 2017 Physicists create first 'topological' laser A new kind of laser, in which light snakes around a cavity of any shape without scattering, has been
Topological insulator laser using valley-Hall photonic crystals. Y Gong, S Wong, AJ Bennett, DL Huffaker, SS Oh. ACS Photonics 7 (8), 2089-2097, 2020. 21 Nov 2018 “topological edge states,” which are peculiar to photonic topological insulators and of disorder immunity, in one-dimensional coupled laser
Research · Topological insulator lasers (Science 2018 and Science 2018) · Unidirectional light propagation in laser systems · Photonic topological Haldane model
4 Dec 2018 Topological Insulator Lasers. Mordechai Segev, Miguel A. Bandres, Gal Harari. Technion – Israel Institute of Technology, Haifa, Israel.

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The proposed system is realized as a truncated array of the lasing helical Topological insulators are a phase of matter with an insulating bulk and conducting edges. A topological insulator is characterized by a bulk bandgap where topological gapless unidirectional edge states reside. These edge states are robust to any perturbation that does not close the bandgap.

We show that for the topological insulator phase, the photoelectromagnetic effect amplitude is deﬁned by the number of incident radiation quanta, whereas for the trivial insulator phase, it depends on the power in a laser pulse irrespective of its wavelength.

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### 2020-02-12 · Previous demonstrations of topological lasers have required an external laser source for optical pumping and have operated in the conventional optical frequency regime 5, 6, 7, 8. Here we

While the topological … 2020-6-2 · We introduce a class of topological lasers based on the photonic Floquet topological insulator concept. The proposed system is realized as a truncated array of lasing helical waveguides, where the We introduce a class of topological lasers based on the photonic Floquet topological insulator concept.

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### TOPOLOGICAL PHOTONICS Topological insulator laser: Experiments Miguel A. Bandres,1* Steffen Wittek, 2* Gal Harari,1* Midya Parto, Jinhan Ren,2 Mordechai Segev,1† Demetrios N. Christodoulides, 2† Mercedeh Khajavikhan † Physical systems exhibiting topological inva riants are naturally endowed with robustness

The proposed system is realized as a truncated array of lasing helical waveguides, where the We introduce a class of topological lasers based on the photonic Floquet topological insulator concept.