Ultrafast optical switches using quantum wells
Colloidal quantum wells have discrete energy states and electrons in the quantum wells undergo interband and intersubband state transitions. The transmissivity of a colloidal quantum well may be tuned by actively controlling the states of the colloidal quantum wells enabling ultrafast optical switching. A primary excitation source is configured to provide a primary excitation to promote a colloidal quantum well from a ground state to a first excitation state. A secondary excitation source is configured to provide a secondary excitation to the colloidal quantum well to promote the colloidal quantum well from the first excitation state to the second excitation state with the first and second excitation states being subbands in the conduction band of the colloidal quantum well.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-06CH11357
- Assignee:
- UChicago Argonne, LLC (Chicago, IL)
- Patent Number(s):
- 11,333,908
- Application Number:
- 16/431,777
- OSTI ID:
- 1892936
- Country of Publication:
- United States
- Language:
- English
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Comparative study of ultrafast intersubband electron scattering times at ∼1.55 μm wavelength in GaN/AlGaN heterostructures
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journal | August 2002 |
Sub-picosecond electron relaxation of near-infrared intersubband transitions in n -doped (CdS/ZnSe)/BeTe quantum wells
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journal | October 2002 |
Optimization of barrier layer thickness in MgSe/CdSe quantum wells for intersubband devices in the near infrared region
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journal | October 2015 |
Near- and mid-infrared intersubband absorption in top-down GaN/AlN nano- and micro-pillars
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journal | November 2018 |
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