Chinese Journal of Lasers, Volume. 47, Issue 7, 701008(2020)
Lasers Based on Two-Dimensional Layered Materials
Figures & Tables(7)
Fig. 1. Atomic structure and optical properties of TMDC. (a) Schematic of atomic structure of TMDC; (b) calculated energies of energy band structures of bulk MoS2, quadri-layer MoS2, bilayer MoS2, and monolayer Mo
Fig. 2. Classifications of optical microcavities. (a) F-P microcavity; (b) microsphere microcavity (WGM); (c) microdisk microcavity (WGM); (d) distributed feedback microcavity; (e) photonic crystal microcavity; (f) distributed Bragg reflector microcavity
Fig. 3. Composite structure of photonic crystals and micro-disks with two-dimensional layered materials to achieve excitonic laser emission at low temperature. (a) Schematic of a monolayer WSe2/PCC device structure, where the electric-field profile (in-plane, x-y) of the fundamental cavity mode is embedded as the color plot, and the inset is the atomic structure of monolayer WS
Fig. 4. A composite microcavity coupled different optical microcavities with TMDC is used to achieve excitonic lasers at room temperature. (a) Structure of microsphere/micro-disk coupled optical cavity with monolayer MoS2 in the middle panel[79]; (b) micro-spectrum of the composite structure with excitation power of 3 μW and 30 μW at room temperature[79]; (c) full width at half maximum and inte
Fig. 5. Microsphere cavity combined with 2D MoS2 to achieve excitonic lasers at high temperatures[84]. (a) Schematic of placing SiO2 microsphere cavity on top of monolayer MoS2; (b) relationship between fluorescence intensity and excitation power at room temperature; (c) 2D pseudo-color plot of the emission spectrum of excitation density versus fluorescence intensity at high temperatures in the composite structure
Fig. 6. Inter-layer exciton laser using photonic crystal and grating structure combined with 2D layered TMDC heterojunction at low temperature. (a) 3D schematic of the fabricated WSe2/MoSe2 heterostructure-photonic crystal composite structure[85]; (b) schematic of the laser device, consisting of a hetero bilayer on a grating cavity[86]; (c) angle-resolved micro-PL spectra for the alo
Table 1. Summary of types and performance of 2D TMDC lasers
View tableTable 1. Summary of types and performance of 2D TMDC lasers
Material Cavity Wavelength / nm Temperature Threshold Linewidth Q-factor Pump source Ref. WSe2 Photonic crystal 739.5 80 K 1 W·cm-2 0.3 nm 2500 632 nm CW laser [77] WS2 Micro-disk resonator 612.2 10 K 5--8 W·cm-2 0.24 nm 2604 473 nm,190 fs, 80 MHz [78] MoS2 Microdisk and microsphere 600--800 RT ~5 μW <0.3 nm 1900--3300 514 nm CW laser [79] WS2 Distributed Bragg reflectors 636.3 RT 0.44 W·cm-2 (0.8±0.3) nm 532 nm CW laser [80] MoTe2 Photonic crystal 1132.25 RT 6.6 W·cm-2 0.202 nm 5603 633 nm CW laser [81] MoTe2 Photonic crystal 1305 RT 1.5 W·cm-2 0.520 nm 2660 785 nm CW laser [82] BN /MoTe2/BN heterostructures Single-mode Resonator 1319 RT 4.2 W·cm-2 0.294 nm 4500 785 nm CW laser [83] MoS2 Microsphere ~660 77--400 K 32--580 W·cm-2 0.30--2.05 nm 400--1900 532 nm CW laser [84] MoS2/WSe2 heterostructures Photonic crystal 1128 RT ~54 μW ~2.26 nm ~423 532 nm CW laser [85] WSe2/MoSe2 heterostructures Silicon nitride grating 912--917 70 K 0.18 μW ~2 meV ~630 633 nm CW laser [86]
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Wang Qi, Zhong Yangguang, Zhao Liyun, Shi Jianwei, Zhang Shuai, Wang Gongtang, Zhang Qing, Liu Xinfeng. Lasers Based on Two-Dimensional Layered Materials[J]. Chinese Journal of Lasers, 2020, 47(7): 701008
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Received: Jan. 19, 2020
Accepted: --
Published Online: Jul. 10, 2020
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