Twisted black phosphorus–based van der Waals stacks for fiber-integrated polarimeters

Abstract

The real-time, in-line analysis of light polarization is critical in optical networks, currently suffering from complex systems with numerous bulky opto-electro-mechanical elements tandemly arranged along the optical path. Here, we design and fabricate a fiber-integrated polarimeter by vertically stacking three photodetection units based on six-layer van der Waals materials, including one bismuth selenide (Bi 2 Se 3 ) layer for power calibration, two twisted black phosphorus (BP) layers for polarization detection, and three hexagonal boron nitride (hBN) layers for encapsulation. The self-power-calibrated, self-driven, and unambiguous detection of both linearly polarized (LP) and circularly polarized (CP) light is realized by the broken symmetry–induced linear photogalvanic effects (LPGEs) and circular photogalvanic effects (CPGEs) in the two BP units. Moreover, the device enables single-pixel polarimetric imaging to acquire spatial polarization information. The ultracompact device structure, free from external optical and mechanical modules, may inspire the development of miniaturized optical and optoelectronic systems.

High Performance Broadband Full Linear Polarimeter based on ReS2 Nanobelts

“…Figure S4 (Supporting Information) shows the 2D plot of the measured polarization‐resolved photocurrent for those two stacked ReS 2 nanobelt devices illuminated by a linearly polarized light with defined polarization directions under different excitation wavelengths and excitation powers. The color dots are experimental data, which can be fitted by the closed elliptic equation, (a I 1 + bI 2 + c ) 2 + ( dI 1 + e ) 2 = 1 [ 34 ] where a , b , c , d , and e are fitting parameters.…”

Preparation, properties and applications of two-dimensional superlattices

“…10e). 180 They established the following relationship between photocurrent ( I ), light power ( P ) and polarization angle ( φ ): I = m · P n , I = I C ·sin(2 φ ) + I L ·sin(4 φ + φ 0 ) + I 0 , where m and n are fitting coefficients, and φ , φ 0 and I 0 are the polarized angle, initial polarized angle and light power, respectively. The in-plane anisotropic properties of BP and ingenious geometric structure of devices are mainly considered.…”

Polarization‐Driven Ultrafast Optical Switching in TiS3 Nanoribbons via Anisotropic Hot Carrier Dynamics

“…Based on these advantages, recent research has demonstrated the potential of quasi-1D materials in high-performance polarization-selective optoelectronic and nanophotonic devices, such as polarization-selective optical sensors and polarized-light emitters. [12][13][14][15][16][17][18][19][20][21] In particular, the combination of their optical anisotropy with low-dimensionalityoriginated ultrafast photoresponse enables polarization-driven optical modulations on femtosecond and picosecond time scales. [22][23][24][25][26][27] This makes quasi-1D materials an ideal platform for realizing polarization-selective and polarization-controlled ultrafast optical switches and modulators, essential components for high-speed optical information processing.…”