Advanced

Phase-synchronous detection of coherent and incoherent nonlinear signals

Karki, Khadga Jung LU ; Kringle, Loni; Marcus, Andrew H. and Pullerits, Tönu LU (2016) In Journal of Optics 18(1).
Abstract
The nonlinear optical response of a material system contains detailed information about its electronic structure. Standard approaches to nonlinear spectroscopy often use multiple beams crossed in a sample, and detect the wave vector matched polarization in transmission. Here, we apply a phase-synchronous digital detection scheme using an excitation geometry with two phase-modulated collinear ultrafast pulses. This scheme can be used to efficiently detect nonlinear coherent signals and incoherent signals, such as higher harmonics and multiphoton fluorescence and photocurrent, from various systems including a photocell device. We present theory and experiment to demonstrate that when the phase of each laser pulse is modulated at the... (More)
The nonlinear optical response of a material system contains detailed information about its electronic structure. Standard approaches to nonlinear spectroscopy often use multiple beams crossed in a sample, and detect the wave vector matched polarization in transmission. Here, we apply a phase-synchronous digital detection scheme using an excitation geometry with two phase-modulated collinear ultrafast pulses. This scheme can be used to efficiently detect nonlinear coherent signals and incoherent signals, such as higher harmonics and multiphoton fluorescence and photocurrent, from various systems including a photocell device. We present theory and experiment to demonstrate that when the phase of each laser pulse is modulated at the frequency phi(1) and phi(2), respectively, nonlinear signals can be isolated at the frequencies n(phi(2) - phi(1)), where n = 0, 1, 2, ... . This approach holds promise for performing nonlinear spectroscopic measurements under low-signal conditions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
nonlinear optics, ultrafast optics, phase-modulation
in
Journal of Optics
volume
18
issue
1
publisher
IOP Publishing
external identifiers
  • wos:000367187000032
  • scopus:84951790806
ISSN
2040-8986
DOI
10.1088/2040-8978/18/1/015504
language
English
LU publication?
yes
id
a5f22345-bcea-40c7-84ee-2f4db172713a (old id 8539916)
date added to LUP
2016-01-26 11:50:08
date last changed
2017-10-22 03:15:42
@article{a5f22345-bcea-40c7-84ee-2f4db172713a,
  abstract     = {The nonlinear optical response of a material system contains detailed information about its electronic structure. Standard approaches to nonlinear spectroscopy often use multiple beams crossed in a sample, and detect the wave vector matched polarization in transmission. Here, we apply a phase-synchronous digital detection scheme using an excitation geometry with two phase-modulated collinear ultrafast pulses. This scheme can be used to efficiently detect nonlinear coherent signals and incoherent signals, such as higher harmonics and multiphoton fluorescence and photocurrent, from various systems including a photocell device. We present theory and experiment to demonstrate that when the phase of each laser pulse is modulated at the frequency phi(1) and phi(2), respectively, nonlinear signals can be isolated at the frequencies n(phi(2) - phi(1)), where n = 0, 1, 2, ... . This approach holds promise for performing nonlinear spectroscopic measurements under low-signal conditions.},
  articleno    = {015504},
  author       = {Karki, Khadga Jung and Kringle, Loni and Marcus, Andrew H. and Pullerits, Tönu},
  issn         = {2040-8986},
  keyword      = {nonlinear optics,ultrafast optics,phase-modulation},
  language     = {eng},
  number       = {1},
  publisher    = {IOP Publishing},
  series       = {Journal of Optics},
  title        = {Phase-synchronous detection of coherent and incoherent nonlinear signals},
  url          = {http://dx.doi.org/10.1088/2040-8978/18/1/015504},
  volume       = {18},
  year         = {2016},
}