Selective Defect Formation in Hexagonal Boron Nitride. Issue 13 (20th May 2019)

• Record Type: Journal Article
• Authors: Abidi, Irfan H.; Mendelson, Noah; Tran, Toan Trong; Tyagi, Abhishek; Zhuang, Minghao; Weng, Lu‐Tao; Özyilmaz, Barbaros; Aharonovich, Igor; Toth, Milos; Luo, Zhengtang
• Is Part Of: Advanced optical materials. Volume 7:Issue 13(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-20
• Subjects: 2D materials -- chemical vapor deposition -- hexagonal boron nitride -- nanophotonics -- single photon emitters; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201900397
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Luminescent defects in hexagonal boron nitride (hBN) have emerged as promising single photon emitters (SPEs) due to their high brightness and robust operation at room temperature. The ability to create such emitters with well‐defined optical properties is a cornerstone toward their integration into on‐chip photonic architectures. Here, an effective approach is reported to fabricate hBN SPEs with desired emission properties in distinct spectral regions via the manipulation of boron diffusion through copper during atmospheric pressure chemical vapor deposition (CVD)—a process termed gettering. Using the gettering technique the resulting zero‐phonon line is deterministically placed between the regions 550 and 600 nm or from 600 to 650 nm, paving the way for hBN SPEs with tailored emission properties. Additionally, rational control over the observed SPE density in the resulting films is demonstrated. The ability to control defect formation during hBN growth provides a cost effective means to improve the crystallinity of CVD hBN films, and lower defect density making it applicable to hBN growth for a wide‐range of applications. The results are important to understand defect formation of quantum emitters in hBN and deploy them for scalable photonic technologies. Abstract : Controlling the emission frequency of single photon emitters (SPEs) in hexagonal boron nitride has been a critical goal since their discovery in 2016. This work demonstrates a robust chemical vapor deposition method for producing SPEs of a preselectable frequency and density, based on modification of the catalytic behavior of copper using a gettering effect during growth.