Photon‐Pair Generation with a 100 nm Thick Carbon Nanotube Film
Abstract
Nonlinear optics based on bulk materials is the current technique of choice for quantum‐state generation and information processing. Scaling of nonlinear optical quantum devices is of significant interest to enable quantum devices with high performance. However, it is challenging to scale the nonlinear optical devices down to the nanoscale dimension due to relatively small nonlinear optical response of traditional bulk materials. Here, correlated photon pairs are generated in the nanometer scale using a nonlinear optical device for the first time. The approach uses spontaneous four‐wave mixing in a carbon nanotube film with extremely large Kerr‐nonlinearity (≈100 000 times larger than that of the widely used silica), which is achieved through careful control of the tube diameter during the carbon nanotube growth. Photon pairs with a coincidence to accidental ratio of 18 at the telecom wavelength of 1.5 µm are generated at room temperature in a ≈100 nm thick carbon nanotube film device, i.e., 1000 times thinner than the smallest existing devices. These results are promising for future integrated nonlinear quantum devices (e.g., quantum emission and processing devices).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 24, 2017
- Source ID
- 10.1002/adma.201605978
Entities
People
- Amos Martinez
- Esko I. Kauppinen
- John Malowicki
- Kim Fook Lee
- Kimmo Mustonen
- Prem Kumar
- Qing Dai
- Yang He
- Ying Tian
- Zhipei Sun
Organizations
- Aalto University
- Air Force Research Laboratory
- Aston University
- Dalian Maritime University
- National Center for Nanoscience and Technology
- National Natural Science Foundation of China
- Northwestern University
- Research Council of Finland
- Seventh Framework Programme
- Tekes