Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators

Javerzac‐Galy, Clément; Kumar, Anshuman; Schilling, Ryan; Piro, Nicolás; Khorasani, Sina; Barbone, Matteo; Goykhman, Ilya; Khurgin, Jacob B.; Ferrari, Andrea C.; Kippenberg, Tobias J.

doi:10.1021/acs.nanolett.8b00749

Cited by 61 publications

(55 citation statements)

References 69 publications

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“…Intrinsically, the photoresponsivity is restricted by their absorption cross section and present lower values because of small thickness of TMDCs . Integration of TMDC materials into photonic structures such as photonic crystals and microcavities offers a solution to enhance the photoresponsivity . For example, Fano‐resonant photonic crystals could significantly boost light absorption in monolayer MoS 2 and the absorption can reach up to 90% at the resonant wavelength .…”

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confidence: 99%

Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector

Zhou

Tian

Kim

et al. 2019

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which is located in the near-infrared and visible region. [9] Bandgaps in TMDCs are tunable by applying external electric field or mechanical strain. Combined with broad-band optical absorption and mechanical flexibility, TMDCs are one of appealing materials for the application in optoelectronic devices such as field effect transistors, photodetectors, and light-emitting diodes. Photodetectors based on molybdenum disulfide (MoS 2 ), [1,3] tungsten disulfide (WS 2 ), [10,11] molybdenum diselenide (MoSe 2 ), [7,8] and their heterojunctions [12] were constructed and exhibited photoresponsivity ranging from a few mA W −1 to several hundred A W −1 , which is related to the materials selected, layer numbers, and device contacts. Intrinsically, the photoresponsivity is restricted by their absorption cross section and present lower values because of small thickness of TMDCs. [9] Integration of TMDC materials into photonic structures such as photonic crystals and microcavities offers a solution to enhance the photoresponsivity. [13][14][15] For example, Fano-resonant photonic crystals could significantly boost light absorption in monolayer MoS 2 and the absorption can reach up to 90% at the resonant wavelength. [13] Another typical approach to enhancing photoresponsivity is to hybridize TMDCs with plasmonic structures. A MoS 2 photodetector hybridized with Ag nanowire network was demonstrated and presented greatly enhanced photocurrent over the pristine MoS 2 photodetectors because of surface plasmon coupling. [5] However, the photoresponsivity can be only enhanced at designed and selected wavelength in these hybrid photodetectors mentioned above. It is promising that 3D mesostructures could enhance light absorption over wide range due to its circular geometry and thus improve photoelectric performance. [16][17][18][19] Rolled-up inorganic nanomembrane-based 3D architectures, [20][21][22] such as nanoscrolls and nanosprings, have great potential in applications of supercapacitors, [23] optical microcavity, [24][25][26] actuators, [27,28] resistive random access memory, [29] motors, [30] etc., because of their distinct properties arising from 3D geometry. In this work, a 3D tubular photodetector is proposed to increase the photoresponsivity of 2D materials benefiting from the significantly enhanced light absorption. We introduce this tubular microstructure into the MoSe 2based photodetector for improved detection performance. 3D photodetector based on rolled-up MoSe 2 nanomembrane was Transition metal dichalcogenides, as a kind of 2D material, are suitable for near-infrared to visible photodetection owing to the bandgaps ranging from 1.0 to 2.0 eV. However, limited light absorption restricts photoresponsivity due to the ultrathin thickness of 2D materials. 3D tubular structures offer a solution to solve the problem because of the light trapping effect which can enhance optical absorption. In this work, thanks to mechanical flexibility of 2D materials, self-rolled-up technology is applied to build up a 3D tubular structure ...

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Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector

Zhou

Tian

Kim

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“…We note that, however, the Purcell enhancement of TMDCs depends only on the cavity mode-volume and not quality factor, as the TMDC exciton-cavity operates at the good cavity regime (i.e. emitter linewidth larger than the cavity linewidth) [24,25]. Broad emitters coupled with large non-radiative decay of the TMDCs exciton further makes accurate measurement of the Purcell enhancement difficult.…”

Section: Enhanced Light-matter Interactionsmentioning

confidence: 96%

Van der Waals materials integrated nanophotonic devices [Invited]

Liu¹,

Zheng²,

Chen³

et al. 2019

Opt. Mater. Express

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Emerging van der Waals materials exhibit a wide range of optical and electronic properties, making them attractive for nanophotonic devices. Due to the nature of van der Waals interactions, this new class of materials can be readily integrated with other existing nanophotonic structures, leading to novel device architectures and operating principles. In this review, we will present the progress of active nanophotonics, realized by integrating van der Waals materials with on-chip optical waveguides or resonators. Additionally, we will review the emerging research area in van der Waals nanophotonics, where the nanophotonic structures are fully made of van der Waals materials. A variety of van der Waals nanophotonic structures, ranging from ultrathin Fresnel lens, metasurfaces to photonic crystal cavities and their potential impacts on miniaturized optical system and quantum technology will be discussed.

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“…The Purcell factor numerically characterizes the Purcell effect, i.e., changing (reducing or increasing) of the decay rate of an emitter near a resonator [132], [133]. The Purcell factor can be found analytically [134]- [142] or numerically [138] for different resonators. Of special interest is the single-mode scenario, when the Purcell factor ( tot F ) depends on the Q-factor and the effective volume ( eff V ) as ~e ff / QV :…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Active Nanophotonics

Krasnok

Alù

2020

Proc. IEEE

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Recent progress in nanofabrication has led to tremendous technological developments in nanophotonics, which rely on the interaction of light with nanostructured matter. Nanophotonics has experienced a large surge of interest in recent years, from basic research to applied technology.The increased importance of extremely low-energy data processing at ultra-fast speeds has been encouraging the use of light for signal transport and processing. Energy demands and interaction time scales become smaller with the physical size of the nanostructures, hence nanophotonics opens the opportunity of integrating a large number of devices that can generate, control, modulate, sense and process light signals at ultrafast speeds and below femtojoule/bit energy levels.However, losses and diffraction pose fundamental challenges to the fundamental ability of nanophotonic structures to confine light efficiently in smaller and smaller volumes. In this framework, active nanophotonics, which combines the latest advances in nanotechnology with gain materials, has become in recent years a vital area of optics research, both from the physics, material science, and engineering standpoint. In this paper, we review recent efforts in enabling active nanodevices for lasing and optical sources, loss compensation, and to realize new optical functionalities, like -symmetry, exceptional points and nontrivial lasing based on suitably engineered distributions of gain and loss in nanostructures.

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Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators

Cited by 61 publications

References 69 publications

Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector

Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector

Van der Waals materials integrated nanophotonic devices [Invited]

Active Nanophotonics

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Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators

Cited by 61 publications

References 69 publications

Rolling up MoSe2 Nanomembranes as a Sensitive Tubular Photodetector

Rolling up MoSe2 Nanomembranes as a Sensitive Tubular Photodetector

Van der Waals materials integrated nanophotonic devices [Invited]

Active Nanophotonics

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Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector

Rolling up MoSe₂ Nanomembranes as a Sensitive Tubular Photodetector