Enhanced terahertz emission from imprinted halide perovskite nanostructures

Abstract

Lead halide perovskites were known to be a prospective family of materials for terahertz (THz) generation. On the other hand, perovskite nanostructures, nanoantennas, and metasurfaces allow tailoring perovskites optical characteristics, resulting in more efficient interaction with incident or emitted light. Moreover, the perovskites are robust materials against formation of defects caused by mechanical deformations and can be efficiently nanostructured by various high throughput methods. In this work, we have enhanced THz emission from MAPbI3 perovskite upon femtosecond laser irradiation using nanoimprint lithography. The formed nanostructures not only improve absorption of the incident laser pulses, but also lead to a non-symmetric near-field distribution. As a result, we have enhanced the efficiency of THz emission from the nanostructured perovskite by 3.5 times as compared with a smooth perovskite film. Our results paved the way for a new application of large-scale perovskite nanostructuring, making halide perovskites competitive with more expensive conventional semiconductors for THz generation.

Hybrid Perovskite Terahertz Photoconductive Antenna

“…The basic properties of perovskites that make them attractive for solar cells also make them appealing for terahertz (THz) range applications [ 7 , 8 ]. Recent experiments on the generation of ultrafast photocurrents in halide perovskites excited with a femtosecond laser leading to emission of THz pulses have demonstrated the potential of these hybrid materials for THz optoelectronics [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. However, while well examined in the optical range [ 16 ], hybrid perovskites remain almost completely unexplored for THz applications.…”

Terahertz spectroscopy in biomedical field: a review on signal-to-noise ratio improvement

“…Korolev et al reported using nanoimprint lithography to enhance THz emission from MAPbI 3 perovskite upon femtosecond laser irradiation. The efficiency of THz emission from the nanostructured perovskite was enhanced by 3.5 times as compared with a smooth perovskite film [70]. In 2020, Cheng et al coated THz antenna by an epsilon-near-zero (ENZ) metamaterial superstrate showed in Fig.…”

Recent Patterning Methods for Halide Perovskite Nanoparticles

“…[ 15 ] Many measures have been considered to resolve this, and various methods have been attempted, ranging from printing patterns with stamps to the use of lasers and inkjets. [ 16–33 ] These methods are presented in Figure .…”

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considered to resolve this, and various methods have been attempted, ranging from printing patterns with stamps to the use of lasers and inkjets. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] These methods are presented in Figure 1.In this article, we describe the perovskite patterning method, in two sections. In the first section, we briefly introduce the traditional perovskite patterning method employing PRs.

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“…considered to resolve this, and various methods have been attempted, ranging from printing patterns with stamps to the use of lasers and inkjets. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] These methods are presented in Figure 1.…”