Enhanced tunable second harmonic generation from twistable interfaces and vertical superlattices in boron nitride homostructures

Yao, Kaiyuan; Finney, Nathan; Zhang, Jin; Moore, Samuel L.; Xian, Lede; Tancogne-Dejean, Nicolas; Liu, Fang; Ardelean, Jenny; Xu, Xinyi; Halbertal, Dorri; Watanabe, Kenji; Taniguchi, Takashi; Ochoa, Héctor; Asenjo-Garcı́a, Ana; Zhu, Xiaoyang; Basov, D. N.; Rubio, Ángel; Dean, Cory; Hone, James; Schuck, P. James

doi:10.1126/sciadv.abe8691

Cited by 100 publications

(109 citation statements)

References 45 publications

(54 reference statements)

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“…[ 31 ] Additionally, a layer dependent SHG response is found to follow SHG iL = i 2 (SHG 1L ) for hBN. [ 189 ] Layer dependent SHG has also been investigated for layered group III–VI MNs such as, GaSe. [ 119 ] ε‐GaSe is a non‐centrosymmetric structure (space group D 3h ) which is reported to show layer dependent SHG enhancement.…”

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

“…Similarly, polarization dependent SHG has been employed to determine the lattice orientation of other D 3h symmetry class members, such as, other TMDs, [ 112 ] hBN, [ 43,189 ] and GaSe. [ 121 ] InSe is found to show a sixfold SHG polar plot due to its hexagonal structure with a C 3v symmetry class.…”

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

“…In the past, artificial layer stacking techniques such as, homostructures, [ 46,52,189 ] heterostructures, [ 190–193 ] and folds, [ 194,195 ] were used successfully to tune the optical and electrical properties of various 2D materials. For instance, a modulation in stacking angle in TMD heterostructures is reported to tune electronic properties and PL response.…”

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

See 2 more Smart Citations

Optical Harmonic Generation in 2D Materials

Khan

Zhang

Ishfaq

et al. 2021

Adv Funct Materials

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2D materials are emerging as ideal candidates for fundamental investigations and new technologies due to their unique optoelectronic properties. Giant nonlinear susceptibility and perfect phase matching in 2D materials lead to extraordinary nonlinear light matter interactions, thus enabling several potential applications and fundamental scientific discoveries in nonlinear optics. For instance, second harmonic generation in 2D materials play an important role in optical devices such as, lasers, tunable waveguides, electro‐optic modulators, and switches. This review will discuss optical harmonic generation (OHG) processes, various characterization modes, and tuning techniques in 2D materials. The future prospectives for OHG in 2D materials is discussed. The extremely promising attributes of combining nonlinear optics and 2D materials is becoming a highly important multidisciplinary field.

show abstract

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

Section: Characterization Of 2d Materials Using Optical Harmonic Generationmentioning

confidence: 99%

See 1 more Smart Citation

Optical Harmonic Generation in 2D Materials

Khan

Zhang

Ishfaq

et al. 2021

Adv Funct Materials

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“…[ 131 ] h‐BN homostructures by nanomechanically rotating and locking stacks of h‐BN bulk crystals have been also fabricated, and the observation of second harmonic generation can be modulated over 50 times. [ 132 ] The findings from h‐BN homojunctions are opening up more possibilities for heterostructure design. The challenges are all there together with many opportunities.…”

Section: Challenges and Opportunities For The Futurementioning

confidence: 99%

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Ren

Innocenzi

2021

Small Structures

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Hexagonal boron nitride (h‐BN) is one of the most attractive 2D materials because of its remarkable properties. Combining h‐BN with other components (e.g., graphene, carbonitride, semiconductors) to form heterostructures opens new perspectives to developing advanced functional devices. In this review, the state‐of‐the‐art in h‐BN heterojunctions is highlighted. The preparation of high‐quality 2D h‐BN structures with fewer defects can maximize its intrinsic properties, such as thermal conductivity and electrical insulation, which are particularly important in 2D van der Waals electronics. On the other hand, the controlled introduction in 2D h‐BN of multiple defects creates new properties and advanced functions. In this last case, only through a better understanding of the nature and function of defects, it is possible to develop advanced applications based on h‐BN heterostructures. Engineering of the heterojunctions, such as the design of bonding at the interfaces, also plays a primary role. Several applications are proposed for h‐BN heterostructures, mostly in sensing and photocatalysis, and some new perspectives worth further studies are opened. Finally, the current challenges and the rising opportunities for the future developments of next‐generation h‐BN heterostructures are discussed.

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“…Controlling the inversion symmetry at the crystal interfaces can be used to introduce broken symmetries that induce a strong nonlinear optical response. Such tunable second harmonic generation was demonstrated with twisted stacks in h-BN homostructures by controlling the twist angle and the underlying moire interface [33].…”

Section: Monolayers Of Two-dimensional H-bnmentioning

confidence: 99%

Review on coherent quantum emitters in hexagonal boron nitride

Kubanek¹

2022

Preprint

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Hexagonal boron nitride is an emerging two-dimensional material with far-reaching applications in fields like nanophotonics or nanomechanics. Its layered architecture plays a key role for new materials such as Van der Waals heterostructures. The layered structure has also unique implications for hosted, optically active defect centers. A very special type of defect center arises from the possibility to host mechanically isolated orbitals localized between the layers. The resulting absence of coupling to low-frequency acoustic phonons turns out to be the essential element to protect the coherence of optical transitions from mechanical interactions with the environment. Consequently, the spectral transition linewidth remains unusually narrow even at room temperature, thus paving a new way towards coherent quantum optics under ambient conditions. In this review, I summarize the state-of-the-art of defect centers in hexagonal boron nitride with a focus on optically coherent defect centers. I discuss the current understanding of the defect centers, remaining questions and potential research directions to overcome pervasive challenges. The field is put into a broad perspective with impact on quantum technology such as quantum optics, quantum photonics as well as spin optomechanics.

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Enhanced tunable second harmonic generation from twistable interfaces and vertical superlattices in boron nitride homostructures

Cited by 100 publications

References 45 publications

Optical Harmonic Generation in 2D Materials

Optical Harmonic Generation in 2D Materials

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Review on coherent quantum emitters in hexagonal boron nitride

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