Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Room-temperature excitonic optical properties in ZnSe-ZnS/GaAs multiple quantum wells

De Z. Shen, Hongyu Li, Jiying Zhang, Xiwu Fan

Published Feb 20, 1998• 0 citations
Publisher

Abstract

Excitonic optical bistability with nanosecond switching time in ZnSe-ZnS multiple quantum wells (MQWs) with a Fabry-Perot (FP) cavity is investigated at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnSe-ZnS MQWs with a FP cavity are about 0.2 MW/cm2 and 6:1, respectively. On the basis of the room temperature excitonic absorption spectra obtained here, we attribute the major nonlinear mechanism for the optical bistability to the excitonic saturating absorption due to phase space filling of excitonic states and excitonic band broadening.

DOI
10.1117/12.300723

Related papers

Picosecond Optical Bistability of ZnS-ZnTe/GaAs Multiple Quantum Wells on Reflection at Room Temperature

Dezhen Shen, Xiwu Fan, Baojun Yang Baojun Yang

The optical bistability with picosecond switching time in ZnS-ZnTe/GaAs multiple quantum wells (MQWs) on reflection at room temperature has been studied for the first time. The research results indicate that the switching threshold from high to low state and contrast ratio for the optical bistability are about 1.2 MW/cm2 and 3:1, respectively. The major nonlinear mechanism for the optical bistability is due to the change of refractive index caused by the band filling effect.

Japanese Journal of Applied Physics•Feb 1, 1995•0 citations

Saturating refractive nonlinearities and optical bistability in ZnSe/CdZnSe MQWs at room temperature

Hongyu Li, De Z. Shen, Jiying Zhang +3 more

The excitonic nonlinear refractive index was calculated by using Kramers-Kronig relation and the saturating absorption of ZnSe/CdZnSe multiple quantum wells (MQWs) was studied under different pump intensities. The maximum nonlinear refractive index change is about -6.19 X 10-3. Excitonic optical bistability in ZnSe/CdZnSe MQWs is investigated at room temperature. The result indicates that the threshold and contrast ratio for the optical bistability in ZnSe/CdZnSe MQWs are about 210Kw/cm2 and 2:1, respectively. On the basis of the excitonic nonlinear theories and excitonic absorption spectra in the ZnSe/CdZnSe MQWs, we attribute the major nonlinear mechanism of the optical bistability in the ZnSe/CdZnSe MQWs to the phase space filling of excitonic states and excitonic band broadening due to exciton-exciton interactions.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Aug 17, 1998•0 citations

ZnTe/CdZnTe MQWs optical bistable device on transmission at room temperature

Hongyu Li, De Z. Shen, Jiying Zhang +4 more

ZnTe/CdZnTe multiple quantum wells (MQWs) optical bistable device has been fabricated, and optical bistability in ZnTe/CdZnTe MQWs optical bistable device is investigated on transmission at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in Zn-Te/CdZnTe MQWs optical bistable device are about 363 kW/cm2 and 4:1, respectively. On the basis of the excitonic nonlinear theories, excitonic absorption spectrum in the ZnTe/CdZnTe MQWs obtained here, we attribute the major nonlinear mechanism for the optical bistability to the saturating effect of excitonic absorption.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Sep 30, 1996•0 citations

Optical bistability in a ZnTe/CdZnTe multiple quantum well optical bistable device at room temperature

Hongyu Li, De Z. Shen, Zhuhong Zheng +2 more

The band edge nonlinear absorption in ZnTe/CdZnTe multiple quantum wells (MQWs) is studied at room temperature. It is found that the exciton absorption peak tends to saturate, broaden and the absorption edge shift to lower energy side with increasing of pump intensities. The optical bistability in ZnTe/CdZnTe MQWs optical bistable device is investigated on transmission at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnTe/CdZnTe MQWs optical bistable device are about 292.5 kW/cm2 and 3:1, respectively.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 20, 1998•0 citations

Excitonic optical bistability in ZnSe/ZnS multiple quantum wells

Dezhen Shen, Iu Y

The excitonic nonlinearities in II-VI wide gap semiconductors have recently become an interesting research topic. Andersen et al.1 studied the saturating absorption of excitonic resonance in ZnSe single crystal films and (Zn, Mn)Se superlattices, which they attributed to Coulombic screening for the case of ZnSe film or a wide-well (Zn,Mn)Se quantum well structure at 77 K, and the Coulombic screening and phase space filling for a narrow-well structure. Gribkovskii et al.2 have observed the increase of excitonic absorption optical bistability in ZnSe film and attributed it to excitonic broadening and gap renormalization for the nonlinear mechanism. We report the first observation of optical bistability in ZnSe/ZnS MQWs grown by MOCVD on CaF2 substrates.

Acta Optica Sinica•Jan 1, 1990•0 citations

Picosecond optical bistability in ZnCdSe/ZnSe multiple quantum wells at room temperature

Lian C. Chen, Xiwu Fan, Youming Lu +5 more

The picosecond optical bistability of Zn1-xCdxSe/ZnSe (x equals 0.23) multiple quantum well (MQW) has been observed by a Streak Camera at room temperature for the first time. In the absorption spectra of ZnCdSe/ZnSe MQW, there are two peaks at 515 nm and 530 nm. We discussed the origin of the two peaks and physical mechanism of the bistability.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Aug 5, 1994•0 citations
Excitonic optical bistability with nanosecond switching time in ZnSe-ZnS multiple quantum wells (MQWs) with a Fabry-Perot (FP) cavity is investigated at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnSe-ZnS MQWs with a FP cavity are about 0.2 MW/cm2 and 6:1, respectively. On the basis of the room temperature excitonic absorption spectra obtained here, we attribute the major nonlinear mechanism for the optical bistability to the excitonic saturating absorption due to phase space filling of excitonic states and excitonic band broadening.
The excitonic nonlinear refractive index was calculated by using Kramers-Kronig relation and the saturating absorption of ZnSe/CdZnSe multiple quantum wells (MQWs) was studied under different pump intensities. The maximum nonlinear refractive index change is about -6.19 X 10-3. Excitonic optical bistability in ZnSe/CdZnSe MQWs is investigated at room temperature. The result indicates that the threshold and contrast ratio for the optical bistability in ZnSe/CdZnSe MQWs are about 210Kw/cm2 and 2:1, respectively. On the basis of the excitonic nonlinear theories and excitonic absorption spectra in the ZnSe/CdZnSe MQWs, we attribute the major nonlinear mechanism of the optical bistability in the ZnSe/CdZnSe MQWs to the phase space filling of excitonic states and excitonic band broadening due to exciton-exciton interactions.
ZnTe/CdZnTe multiple quantum wells (MQWs) optical bistable device has been fabricated, and optical bistability in ZnTe/CdZnTe MQWs optical bistable device is investigated on transmission at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in Zn-Te/CdZnTe MQWs optical bistable device are about 363 kW/cm2 and 4:1, respectively. On the basis of the excitonic nonlinear theories, excitonic absorption spectrum in the ZnTe/CdZnTe MQWs obtained here, we attribute the major nonlinear mechanism for the optical bistability to the saturating effect of excitonic absorption.
The band edge nonlinear absorption in ZnTe/CdZnTe multiple quantum wells (MQWs) is studied at room temperature. It is found that the exciton absorption peak tends to saturate, broaden and the absorption edge shift to lower energy side with increasing of pump intensities. The optical bistability in ZnTe/CdZnTe MQWs optical bistable device is investigated on transmission at room temperature. The research result indicates that the threshold and contrast ratio for the optical bistability in ZnTe/CdZnTe MQWs optical bistable device are about 292.5 kW/cm2 and 3:1, respectively.
The excitonic nonlinearities in II-VI wide gap semiconductors have recently become an interesting research topic. Andersen et al.1 studied the saturating absorption of excitonic resonance in ZnSe single crystal films and (Zn, Mn)Se superlattices, which they attributed to Coulombic screening for the case of ZnSe film or a wide-well (Zn,Mn)Se quantum well structure at 77 K, and the Coulombic screening and phase space filling for a narrow-well structure. Gribkovskii et al.2 have observed the increase of excitonic absorption optical bistability in ZnSe film and attributed it to excitonic broadening and gap renormalization for the nonlinear mechanism. We report the first observation of optical bistability in ZnSe/ZnS MQWs grown by MOCVD on CaF2 substrates.