High-frequency operation of spin vertical-cavity surface-emitting lasers: towards 100 GHz

Nils C. Gerhardt; Markus Lindemann; Tobias Pusch; Rainer Michalzik; Martin R. Hofmann

doi:10.1117/12.2237163

26 September 2016 High-frequency operation of spin vertical-cavity surface-emitting lasers: towards 100 GHz

Nils C. Gerhardt, Markus Lindemann, Tobias Pusch, Rainer Michalzik, Martin R. Hofmann

Proceedings Volume 9931, Spintronics IX; 99310C (2016) https://doi.org/10.1117/12.2237163
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

Spin-controlled vertical-cavity surface-emitting lasers (spin-VCSELs) have a high potential to overcome limitations of conventional purely charge-based lasers. Probably the most important feature of such spin-lasers lies in their ultrafast spin and polarization dynamics which are decoupled from the intensity dynamics and their limitations. This yields the potential to modulate the polarization state of spin-VCSELs with frequencies far above the barriers known for the intensity modulation dynamics of conventional VCSELs. Such a quality makes them ideal devices for fast optical interconnects. While in conventional devices relaxation oscillations provide insights in the intensity dynamics and modulation bandwidth, in spin-VCSELs oscillations in the circular polarization degree are an ideal measure for investigating the dynamics of the coupled spin-photon system. These polarization oscillations (POs) can be generated using pulsed spin injection and have been proven to be much faster than intensity dynamics in the devices. Their frequency is mainly dependent on the birefringence in the cavities and can be increased by adding mechanical strain. Using an approach for manipulating the birefringence via mechanical strain we demonstrated tunable POs with frequencies up to 44 GHz, recently. Taking our results for strain-induced birefringence splitting of more than 250 GHz into account, the concept has the potential to overcome conventional limitations and to provide polarization modulation in VCSELs with bit rates beyond 100 Gbit=s. In this paper we investigate numerically the in uence of the spin decay rate on the PO amplitude and frequency in order to investigate potential limitations for future ultrafast polarization modulation schemes.

Citation Download Citation

Nils C. Gerhardt, Markus Lindemann, Tobias Pusch, Rainer Michalzik, and Martin R. Hofmann "High-frequency operation of spin vertical-cavity surface-emitting lasers: towards 100 GHz", Proc. SPIE 9931, Spintronics IX, 99310C (26 September 2016); https://doi.org/10.1117/12.2237163

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Polarization

Modulation

Vertical cavity surface emitting lasers

Birefringence

Polonium

Picosecond phenomena

Ultrafast phenomena

Show All Keywords

Keywords/Phrases

Search In:

Publication Years