Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/137226
Title: Large photothermal effect in sub-40 nm h-BN nanostructures patterned via high-resolution ion beam
Authors: López, Josué J
Ambrosio, Antonio
Dai, Siyuan
Huynh, Chuong
Bell, David C
Lin, Xiao
Rivera, Nicholas
Huang, Shengxi
Ma, Qiong
Eyhusen, Soeren
Kaminer, Ido E
Watanabe, Kenji
Taniguchi, Takashi
Kong, Jing
Basov, Dimitri N
Jarillo-Herrero, Pablo
Soljačić, Marin
Keywords: Science::Physics
Issue Date: 2018
Source: López, J. J., Ambrosio, A., Dai, S., Huynh, C., Bell, D. C., Lin, X., . . . Soljačić, M. (2018). Large photothermal effect in sub‐40 nm h‐BN nanostructures patterned via high‐resolution ion beam. Small, 14(22), 1800072-. doi:10.1002/smll.201800072
Journal: Small
Abstract: The controlled nanoscale patterning of 2D materials is a promising approach for engineering the optoelectronic, thermal, and mechanical properties of these materials to achieve novel functionalities and devices. Herein, high-resolution patterning of hexagonal boron nitride (h-BN) is demonstrated via both helium and neon ion beams and an optimal dosage range for both ions that serve as a baseline for insulating 2D materials is identified. Through this nanofabrication approach, a grating with a 35 nm pitch, individual structure sizes down to 20 nm, and additional nanostructures created by patterning crystal step edges are demonstrated. Raman spectroscopy is used to study the defects induced by the ion beam patterning and is correlated to scanning probe microscopy. Photothermal and scanning near-field optical microscopy measure the resulting near-field absorption and scattering of the nanostructures. These measurements reveal a large photothermal expansion of nanostructured h-BN that is dependent on the height to width aspect ratio of the nanostructures. This effect is attributed to the large anisotropy of the thermal expansion coefficients of h-BN and the nanostructuring implemented. The photothermal expansion should be present in other van der Waals materials with large anisotropy and can lead to applications such as nanomechanical switches driven by light.
URI: https://hdl.handle.net/10356/137226
ISSN: 1613-6810
DOI: 10.1002/smll.201800072
Schools: School of Physical and Mathematical Sciences 
Rights: This is the peer reviewed version of the following article: López, J. J., Ambrosio, A., Dai, S., Huynh, C., Bell, D. C., Lin, X., . . . Soljačić, M. (2018). Large photothermal effect in sub‐40 nm h‐BN nanostructures patterned via high‐resolution ion beam. Small, 14(22), 1800072-, which has been published in final form at https://doi.org/10.1002/smll.201800072. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

SCOPUSTM   
Citations 20

13
Updated on Mar 24, 2024

Web of ScienceTM
Citations 20

12
Updated on Oct 28, 2023

Page view(s)

264
Updated on Mar 28, 2024

Download(s) 50

61
Updated on Mar 28, 2024

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.