Construction of photodetectors to measure quantum noise

• Grant number: 22/02129-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2022
• End date: February 28, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - General Physics
• Principal Investigator: Felippe Alexandre Silva Barbosa
• Grantee: Leonardo Nogueira Falabella
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 18/03474-7 - Nonclassical states of light on chip, AP.JP

Abstract

Photo detection is a crucial step for any optical experiment. The detection accuracy and spectral response are the main factors determining which properties can be observed and on which time scales. The goal of this project is to design and build amplified photodetectors capable of measuring quantum noise. We will optimize the ratio between shot noise and dark noise, shot noise clearance, and the detector's spectral bandwidth. These detectors will be used to characterize the quantum states of light, in particular for measuring squeezed and entangled states.(AU)