Liquid-Crystal Spin-VCSEL with Electro-Optically Controllable Birefringence

Panajotov, Krassimir; Petrov, M.; Marinov, Yordan G.

doi:10.3390/photonics10020179

Cited by 5 publications

(3 citation statements)

References 34 publications

(49 reference statements)

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“…Spin‐VCSELs have experienced increased research interest in the past years. Among others, experimental and theoretical work for birefringence control [7], radio‐over‐fibre systems [8], dynamics of laterally‐coupled pairs of Spin‐VCSELs [9] and a model for modulation dynamics up to the THz range based on grating structures has been conducted [10]. A description of the application‐related utilization of polarization dynamics in spin‐VCSELs and the required concepts for electrical spin‐injection for spin‐modulations can be found in a previous publication [3].…”

Section: Introductionmentioning

confidence: 99%

Polarization dynamics in spin‐VCSELs with integrated surface grating for high birefringence splitting

Lindemann,

Jung,

Manrique‐Nieto

et al. 2023

Electronics Letters

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Polarization dynamics in spin-polarized vertical-cavity surface-emitting lasers (spin-VCSELs) with high birefringence have recently been demonstrated to offer very high potential for optical data-transmission systems that outperform their counterparts based on conventional direct current modulation by far. For polarization dynamics in spin-VCSELs, the birefringence determines the resonance frequency and thus the modulation bandwidth. In previous work, birefringence was controlled using mechanical strain, which lacks the ability to be integrated in standard VCSEL manufacturing processes. In this work the polarization dynamics of a VCSEL with an integrated birefringence control mechanism is demonstrated based on custom designed integrated surface gratings. It is found that, despite the surface grating which is commonly known to stabilize the polarization, the presented spin-VCSELs are able to generate polarization oscillations with frequencies corresponding to the birefringence induced by the surface grating and show polarization dynamics up to 68 GHz.

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Section: Introductionmentioning

confidence: 99%

Polarization dynamics in spin‐VCSELs with integrated surface grating for high birefringence splitting

Lindemann,

Jung,

Manrique‐Nieto

et al. 2023

Electronics Letters

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“…Likewise, Panajotov and coworkers proposed a liquid crystal Spin-polarized Vertical-Cavity Surface-Emitting Lasers (VCSEL) with electro-optically controllable birefringence. [38] The liquid crystal-filled photonic cavity can be utilized in mimicking complex spin manipulation based on the coupling of the spin-orbit interaction by tuning synthetic Hamiltonian consisting of the Rashba-Dresselhaus and Zeeman terms. [39] Soft crystals are a new material class that can respond to gentle stimuli while maintaining their structural order.…”

Section: New Class Materials For Organic Spintronicsmentioning

confidence: 99%

Bridging Performance Gaps: Exploring New Classes of Materials for Future Spintronics Technological Challenges

Al‐Qatatsheh,

Juodkazis,

Hameed

2023

Adv Quantum Tech

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Technological challenges, such as insufficient computation power, inefficient data storage, and unsafe communication, may not be tackled by currently utilized semiconductors or superconductors, which are still far from meeting the requirements of quantum‐age applications. Spintronics, focused on electron transport phenomena dependent on spin, holds promise as an advanced technology. Nevertheless, most recent quantum technologies adopted by leading businesses and start‐ups rely heavily on others, and there is a race to increase the number of qubits to gain a computational advantage. Therefore, it is crucial to consider new classes of materials instead of the conventional ones. Developing high‐performance organic spintronics based on new classes of materials, namely, ionic liquids (ILs), liquid and soft crystals, and macroradicals, can support high‐speed and low‐power computing applications, offering higher spin‐relaxation times in the order of microsecond at room temperature. This perspective discusses the key challenges of the currently utilized inorganic semiconductors, small molecules, and π‐conjugated polymers. It also discusses how the new classes of organic spintronics can bridge these performance gaps.

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“…The second section of this Special Issue presents four papers dedicated to the exploration of new types of semiconductor lasers and devices. Among these, Panajotov et al introduced a groundbreaking spin-VCSEL, which embeds a nematic liquid crystal in a second cavity, achieving an astonishing small-signal modulation response of several hundreds of GHz [3]. This advancement represents a significant breakthrough, outperforming conventional VCSELs by more than 10-times.…”

mentioning

confidence: 99%