Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory

Taek Sung Lee, Hyun Seok Lee, Byung Ki Cheong, Jeung Hyun Jeong, Dae Hwan Kang, Wu Zhe, Won Mok Kim, Donghwan Kim, Kyuman Cho

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An experimental study is conducted toward understanding the mechanism of nonlinear optical properties of PbTe thin film that were demonstrated potentially usable for nano-optical memory based on super-resolution technology. By way of a real time optical-electrical characterization of a PbTe thin film device, it is found that absorption coefficient decreases with increasing laser power, accompanied by increase in carrier concentration. From z-scan measurements, nonlinear optical coefficient due to a long pulse (1 μs) z-scan is found nearly 3 order of magnitude higher than the one due to a short pulse (30 ps) z-scan when input energy density is relatively comparable. Conceivably, these experimental findings call for a physical model that is able to account for the prevailing role of a thermal contribution within the framework of absorption saturation by band filling. We speculate that the absorption saturation might be enhanced dramatically by making various indirect interband transitions possible via participation of phonons in a photonic excitation process.

Original languageEnglish
Pages (from-to)293-297
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number1
Publication statusPublished - 2007 Jan 1

Fingerprint

Thin film devices
Optical data storage
Phonons
Photonics
Carrier concentration
Optical properties
saturation
Thin films
Lasers
thin films
pulses
Optics and Photonics
absorptivity
phonons
flux density
photonics
optical properties
coefficients
Hot Temperature
excitation

Keywords

  • Absorption Saturation
  • Band Filling
  • Nano-Optical Memory
  • Nonlinear Optical Property
  • PbTe
  • Super-Resolution (SR)
  • Thermoelectric

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Materials Science (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Lee, T. S., Lee, H. S., Cheong, B. K., Jeong, J. H., Kang, D. H., Zhe, W., ... Cho, K. (2007). Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory. Journal of Nanoscience and Nanotechnology, 7(1), 293-297.

Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory. / Lee, Taek Sung; Lee, Hyun Seok; Cheong, Byung Ki; Jeong, Jeung Hyun; Kang, Dae Hwan; Zhe, Wu; Kim, Won Mok; Kim, Donghwan; Cho, Kyuman.

In: Journal of Nanoscience and Nanotechnology, Vol. 7, No. 1, 01.01.2007, p. 293-297.

Research output: Contribution to journalArticle

Lee, TS, Lee, HS, Cheong, BK, Jeong, JH, Kang, DH, Zhe, W, Kim, WM, Kim, D & Cho, K 2007, 'Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory', Journal of Nanoscience and Nanotechnology, vol. 7, no. 1, pp. 293-297.
Lee, Taek Sung ; Lee, Hyun Seok ; Cheong, Byung Ki ; Jeong, Jeung Hyun ; Kang, Dae Hwan ; Zhe, Wu ; Kim, Won Mok ; Kim, Donghwan ; Cho, Kyuman. / Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory. In: Journal of Nanoscience and Nanotechnology. 2007 ; Vol. 7, No. 1. pp. 293-297.
@article{9242206a4b324119aea5afcf671ac882,
title = "Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory",
abstract = "An experimental study is conducted toward understanding the mechanism of nonlinear optical properties of PbTe thin film that were demonstrated potentially usable for nano-optical memory based on super-resolution technology. By way of a real time optical-electrical characterization of a PbTe thin film device, it is found that absorption coefficient decreases with increasing laser power, accompanied by increase in carrier concentration. From z-scan measurements, nonlinear optical coefficient due to a long pulse (1 μs) z-scan is found nearly 3 order of magnitude higher than the one due to a short pulse (30 ps) z-scan when input energy density is relatively comparable. Conceivably, these experimental findings call for a physical model that is able to account for the prevailing role of a thermal contribution within the framework of absorption saturation by band filling. We speculate that the absorption saturation might be enhanced dramatically by making various indirect interband transitions possible via participation of phonons in a photonic excitation process.",
keywords = "Absorption Saturation, Band Filling, Nano-Optical Memory, Nonlinear Optical Property, PbTe, Super-Resolution (SR), Thermoelectric",
author = "Lee, {Taek Sung} and Lee, {Hyun Seok} and Cheong, {Byung Ki} and Jeong, {Jeung Hyun} and Kang, {Dae Hwan} and Wu Zhe and Kim, {Won Mok} and Donghwan Kim and Kyuman Cho",
year = "2007",
month = "1",
day = "1",
language = "English",
volume = "7",
pages = "293--297",
journal = "Journal of Nanoscience and Nanotechnology",
issn = "1533-4880",
publisher = "American Scientific Publishers",
number = "1",

}

TY - JOUR

T1 - Toward understanding the mechanism of nonlinear optical characteristics of PbTe thin film for nano-optical memory

AU - Lee, Taek Sung

AU - Lee, Hyun Seok

AU - Cheong, Byung Ki

AU - Jeong, Jeung Hyun

AU - Kang, Dae Hwan

AU - Zhe, Wu

AU - Kim, Won Mok

AU - Kim, Donghwan

AU - Cho, Kyuman

PY - 2007/1/1

Y1 - 2007/1/1

N2 - An experimental study is conducted toward understanding the mechanism of nonlinear optical properties of PbTe thin film that were demonstrated potentially usable for nano-optical memory based on super-resolution technology. By way of a real time optical-electrical characterization of a PbTe thin film device, it is found that absorption coefficient decreases with increasing laser power, accompanied by increase in carrier concentration. From z-scan measurements, nonlinear optical coefficient due to a long pulse (1 μs) z-scan is found nearly 3 order of magnitude higher than the one due to a short pulse (30 ps) z-scan when input energy density is relatively comparable. Conceivably, these experimental findings call for a physical model that is able to account for the prevailing role of a thermal contribution within the framework of absorption saturation by band filling. We speculate that the absorption saturation might be enhanced dramatically by making various indirect interband transitions possible via participation of phonons in a photonic excitation process.

AB - An experimental study is conducted toward understanding the mechanism of nonlinear optical properties of PbTe thin film that were demonstrated potentially usable for nano-optical memory based on super-resolution technology. By way of a real time optical-electrical characterization of a PbTe thin film device, it is found that absorption coefficient decreases with increasing laser power, accompanied by increase in carrier concentration. From z-scan measurements, nonlinear optical coefficient due to a long pulse (1 μs) z-scan is found nearly 3 order of magnitude higher than the one due to a short pulse (30 ps) z-scan when input energy density is relatively comparable. Conceivably, these experimental findings call for a physical model that is able to account for the prevailing role of a thermal contribution within the framework of absorption saturation by band filling. We speculate that the absorption saturation might be enhanced dramatically by making various indirect interband transitions possible via participation of phonons in a photonic excitation process.

KW - Absorption Saturation

KW - Band Filling

KW - Nano-Optical Memory

KW - Nonlinear Optical Property

KW - PbTe

KW - Super-Resolution (SR)

KW - Thermoelectric

UR - http://www.scopus.com/inward/record.url?scp=34447296757&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447296757&partnerID=8YFLogxK

M3 - Article

C2 - 17455494

AN - SCOPUS:34447296757

VL - 7

SP - 293

EP - 297

JO - Journal of Nanoscience and Nanotechnology

JF - Journal of Nanoscience and Nanotechnology

SN - 1533-4880

IS - 1

ER -