Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS
Abstract Using high‐resolution scanning transmission electron microscopy and low‐loss electron energy loss spectroscopy, the local bandgap (Eg), indium concentration, and strain distribution across multiple InxGa1‐xAs quantum wells (QWs), on a GaAs substrate, within a metamorphic laser structure are...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-05-01
|
| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202400897 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849714800373792768 |
|---|---|
| author | Nicholas Stephen Ivan Pinto‐Huguet Robert Lawrence Demie Kepaptsoglou Marc Botifoll Agnieszka Gocalinska Enrica Mura Quentin Ramasse Emanuele Pelucchi Jordi Arbiol Miryam Arredondo |
| author_facet | Nicholas Stephen Ivan Pinto‐Huguet Robert Lawrence Demie Kepaptsoglou Marc Botifoll Agnieszka Gocalinska Enrica Mura Quentin Ramasse Emanuele Pelucchi Jordi Arbiol Miryam Arredondo |
| author_sort | Nicholas Stephen |
| collection | DOAJ |
| description | Abstract Using high‐resolution scanning transmission electron microscopy and low‐loss electron energy loss spectroscopy, the local bandgap (Eg), indium concentration, and strain distribution across multiple InxGa1‐xAs quantum wells (QWs), on a GaAs substrate, within a metamorphic laser structure are correlated. The findings reveal significant inhomogeneities, particularly near the interfaces, for both the indium and strain distribution, and subtle variations in the Eg across individual QWs. The interplay between strain, composition, and Eg is further explored by density functional theory simulations, indicating that variations in the Eg are predominantly influenced by the indium concentration, with strain playing a minor role. The observed local inhomogeneities suggest that differences between individual QWs may affect the collective emission and performance of the final device. This study highlights the importance of spatially resolved analysis in understanding and optimizing the electronic and optical properties for designing next‐generation metamorphic lasers with multiple QWs as the active region. |
| format | Article |
| id | doaj-art-2eda4233ff8b4e168d214d92cb5d4bfe |
| institution | DOAJ |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-2eda4233ff8b4e168d214d92cb5d4bfe2025-08-20T03:13:36ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-05-011210n/an/a10.1002/admi.202400897Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELSNicholas Stephen0Ivan Pinto‐Huguet1Robert Lawrence2Demie Kepaptsoglou3Marc Botifoll4Agnieszka Gocalinska5Enrica Mura6Quentin Ramasse7Emanuele Pelucchi8Jordi Arbiol9Miryam Arredondo10School of Mathematics and Physics Queen's University Belfast University Road Belfast BT71NN UKCISC and BIST Catalan Institute of Nanoscience and Nanotechnology (ICN2) Campus UAB, Bellaterra Barcelona Catalonia 08193 SpainSchool of Physics Engineering and Technology University of York Heslington York YO10 5DD UKSchool of Physics Engineering and Technology University of York Heslington York YO10 5DD UKCISC and BIST Catalan Institute of Nanoscience and Nanotechnology (ICN2) Campus UAB, Bellaterra Barcelona Catalonia 08193 SpainTyndall National Institute University College Cork “Lee Maltings”, Dyke Parade Cork T12 R5CP IrelandTyndall National Institute University College Cork “Lee Maltings”, Dyke Parade Cork T12 R5CP IrelandSuperSTEM Laboratory SciTech Daresbury Campus Daresbury WA4 4AD UKTyndall National Institute University College Cork “Lee Maltings”, Dyke Parade Cork T12 R5CP IrelandCISC and BIST Catalan Institute of Nanoscience and Nanotechnology (ICN2) Campus UAB, Bellaterra Barcelona Catalonia 08193 SpainSchool of Mathematics and Physics Queen's University Belfast University Road Belfast BT71NN UKAbstract Using high‐resolution scanning transmission electron microscopy and low‐loss electron energy loss spectroscopy, the local bandgap (Eg), indium concentration, and strain distribution across multiple InxGa1‐xAs quantum wells (QWs), on a GaAs substrate, within a metamorphic laser structure are correlated. The findings reveal significant inhomogeneities, particularly near the interfaces, for both the indium and strain distribution, and subtle variations in the Eg across individual QWs. The interplay between strain, composition, and Eg is further explored by density functional theory simulations, indicating that variations in the Eg are predominantly influenced by the indium concentration, with strain playing a minor role. The observed local inhomogeneities suggest that differences between individual QWs may affect the collective emission and performance of the final device. This study highlights the importance of spatially resolved analysis in understanding and optimizing the electronic and optical properties for designing next‐generation metamorphic lasers with multiple QWs as the active region.https://doi.org/10.1002/admi.202400897bandgapelectron energy loss spectroscopyin concentrationInGaAsquantum wellstrain distribution |
| spellingShingle | Nicholas Stephen Ivan Pinto‐Huguet Robert Lawrence Demie Kepaptsoglou Marc Botifoll Agnieszka Gocalinska Enrica Mura Quentin Ramasse Emanuele Pelucchi Jordi Arbiol Miryam Arredondo Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS Advanced Materials Interfaces bandgap electron energy loss spectroscopy in concentration InGaAs quantum well strain distribution |
| title | Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS |
| title_full | Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS |
| title_fullStr | Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS |
| title_full_unstemmed | Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS |
| title_short | Evaluating the Local Bandgap Across inxGa1‐xas Multiple Quantum Wells in a Metamorphic Laser via Low‐Loss EELS |
| title_sort | evaluating the local bandgap across inxga1 xas multiple quantum wells in a metamorphic laser via low loss eels |
| topic | bandgap electron energy loss spectroscopy in concentration InGaAs quantum well strain distribution |
| url | https://doi.org/10.1002/admi.202400897 |
| work_keys_str_mv | AT nicholasstephen evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT ivanpintohuguet evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT robertlawrence evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT demiekepaptsoglou evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT marcbotifoll evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT agnieszkagocalinska evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT enricamura evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT quentinramasse evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT emanuelepelucchi evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT jordiarbiol evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels AT miryamarredondo evaluatingthelocalbandgapacrossinxga1xasmultiplequantumwellsinametamorphiclaservialowlosseels |