Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region
The propagation of light in the epsilon-near-zero (ENZ) region of materials exhibits intriguing linear and nonlinear optical phenomenon that have been extensively exploited for a plethora of applications. Here, we show that the optical properties as well as the ENZ wavelength of magnetron-sputtered...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-08-01
|
| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2022-0306 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850159228911616000 |
|---|---|
| author | Lau Kuen Yao Yang Yuting Zhao Di Liu Xiaofeng Qiu Jianrong |
| author_facet | Lau Kuen Yao Yang Yuting Zhao Di Liu Xiaofeng Qiu Jianrong |
| author_sort | Lau Kuen Yao |
| collection | DOAJ |
| description | The propagation of light in the epsilon-near-zero (ENZ) region of materials exhibits intriguing linear and nonlinear optical phenomenon that have been extensively exploited for a plethora of applications. Here, we show that the optical properties as well as the ENZ wavelength of magnetron-sputtered indium tin oxide (ITO) thin films could be judiciously engineered. The measurement of nonlinear optical properties reveals that the control of deposition conditions allows for the tuning of absorptive optical nonlinearity between saturable absorption and reverse saturable absorption. The ENZ wavelength for the ITO film is deduced as around 1553 nm. We obtain the highest third-order nonlinear absorption coefficient and imaginary part of third-order nonlinear susceptibility for the ITO thin film through Z-scan method as −50.56 cm/GW and ∼38 × 10−14 e.s.u. at 1050 nm, and −64.50 cm/GW and ∼45 × 10−14 e.s.u. at 1550 nm, respectively. We demonstrate further that the strong saturable absorption of the ITO thin film enables Q-switched pulse laser generation in ∼1050 and ∼1550 nm regions with tunable repetition rates and pulse energies. The present results suggest the great application potential of the ITO thin film in the field of nonlinear optical devices. |
| format | Article |
| id | doaj-art-a3156f25e89c4fa0a551196abe5561d9 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-a3156f25e89c4fa0a551196abe5561d92025-08-20T02:23:36ZengDe GruyterNanophotonics2192-86142022-08-0111184209421910.1515/nanoph-2022-0306Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero regionLau Kuen Yao0Yang Yuting1Zhao Di2Liu Xiaofeng3Qiu Jianrong4College of Optical Science and Engineering and State Key Lab of Modern Optical Instrumentation, Zhejiang University, 310027, Hangzhou, ChinaSchool of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 430074, Wuhan, ChinaSchool of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, ChinaCollege of Optical Science and Engineering and State Key Lab of Modern Optical Instrumentation, Zhejiang University, 310027, Hangzhou, ChinaThe propagation of light in the epsilon-near-zero (ENZ) region of materials exhibits intriguing linear and nonlinear optical phenomenon that have been extensively exploited for a plethora of applications. Here, we show that the optical properties as well as the ENZ wavelength of magnetron-sputtered indium tin oxide (ITO) thin films could be judiciously engineered. The measurement of nonlinear optical properties reveals that the control of deposition conditions allows for the tuning of absorptive optical nonlinearity between saturable absorption and reverse saturable absorption. The ENZ wavelength for the ITO film is deduced as around 1553 nm. We obtain the highest third-order nonlinear absorption coefficient and imaginary part of third-order nonlinear susceptibility for the ITO thin film through Z-scan method as −50.56 cm/GW and ∼38 × 10−14 e.s.u. at 1050 nm, and −64.50 cm/GW and ∼45 × 10−14 e.s.u. at 1550 nm, respectively. We demonstrate further that the strong saturable absorption of the ITO thin film enables Q-switched pulse laser generation in ∼1050 and ∼1550 nm regions with tunable repetition rates and pulse energies. The present results suggest the great application potential of the ITO thin film in the field of nonlinear optical devices.https://doi.org/10.1515/nanoph-2022-0306magnetron sputtering depositionmetal oxide semiconductoroptical nonlinearitysaturable absorptionthin film |
| spellingShingle | Lau Kuen Yao Yang Yuting Zhao Di Liu Xiaofeng Qiu Jianrong Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region Nanophotonics magnetron sputtering deposition metal oxide semiconductor optical nonlinearity saturable absorption thin film |
| title | Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region |
| title_full | Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region |
| title_fullStr | Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region |
| title_full_unstemmed | Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region |
| title_short | Tunable optical nonlinearity of indium tin oxide for optical switching in epsilon-near-zero region |
| title_sort | tunable optical nonlinearity of indium tin oxide for optical switching in epsilon near zero region |
| topic | magnetron sputtering deposition metal oxide semiconductor optical nonlinearity saturable absorption thin film |
| url | https://doi.org/10.1515/nanoph-2022-0306 |
| work_keys_str_mv | AT laukuenyao tunableopticalnonlinearityofindiumtinoxideforopticalswitchinginepsilonnearzeroregion AT yangyuting tunableopticalnonlinearityofindiumtinoxideforopticalswitchinginepsilonnearzeroregion AT zhaodi tunableopticalnonlinearityofindiumtinoxideforopticalswitchinginepsilonnearzeroregion AT liuxiaofeng tunableopticalnonlinearityofindiumtinoxideforopticalswitchinginepsilonnearzeroregion AT qiujianrong tunableopticalnonlinearityofindiumtinoxideforopticalswitchinginepsilonnearzeroregion |